Re: ssh tutorial
I just did this and it worked for me. ssh a...@p.q.r.s p.q.r.s is the ip address of the remote pc. Both pc have openssh-server,openssh-client installed. --- On Sun, 6/7/09, Rick Sewill rsew...@cableone.net wrote: From: Rick Sewill rsew...@cableone.net Subject: Re: ssh tutorial To: Community assistance, encouragement, and advice for using Fedora. fedora-list@redhat.com Date: Sunday, June 7, 2009, 5:53 AM On Sat, 2009-06-06 at 13:24 -0500, Gregory P. Ennis wrote: On Fri, 2009-06-05 at 23:39 -0700, gmspro wrote: Would anyone tell how to use ssh command in brief? Cris gave a great explanation. and looking at the man page is also a must. In practical terms ssh replaces telnet so that your computer to computer connections can be accomplished with encrypted tcp/ip packets. You can establish computer to computer connections with telnet, but it does not customarily encrypt which means the content of your connection can be sniffed and understood by someone monitoring your network. ssh prevents the sniffer from understanding what is being sent from computer to computer. Because ssh is so much better than telnet, telnet servers are usually turned off and not used. Greg Chris' explanation is good. May I suggest the original questioner needs to find the information needed to connect to that particular ssh server. The original questioner may need to talk with the person (ssh server administrator) who is running the ssh server. The ssh server administrator should have a cookbook telling how to connect to his server. I am assume the original questioner is not the ssh server administrator. The ssh server administrator can configure which ssh protocol version(s) of ssh will work, what types of authentication will work, whether X11 will will be forwarded, and many other options. The ssh server administrator can even force a particular user to execute a specific program when the user tries to connect. The ssh server administrator will need to create an account and make configuration changes to allow people to connect to that account. Sometimes, a ssh server administrator might create an anonymous account that runs a particular program, such as cvs to allow people to anonymously retrieve source code. In every case that I can think of, the original questioner will need to find documentation on how to connect or will need to talk with the ssh server administrator. I would also suggest, using the -v option on the ssh command. I believe one can type ssh -v -v -v u...@host From man ssh, -v Verbose mode. Causes ssh to print debugging messages about its progress. This is helpful in debugging connection, authentica- tion, and configuration problems. Multiple -v options increase the verbosity. The maximum is 3. The output from the -v -v -v options may help the ssh server administrator help the original questioner find out what is wrong when the original questioner tries to connect. -Inline Attachment Follows- -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
Thanks.
I did this and it works for me.
ssh a...@ipaddress
But if I do
ssh ipaddress
ssh: connect to host ipaddress port 22: No route to host
--- On Sun, 6/7/09, Chris Tyler ch...@tylers.info wrote:
From: Chris Tyler ch...@tylers.info
Subject: Re: ssh tutorial
To: Community assistance, encouragement, and advice for using Fedora.
fedora-list@redhat.com
Date: Sunday, June 7, 2009, 12:04 AM
On Fri, 2009-06-05 at 23:39 -0700,
gmspro wrote:
Would anyone tell how to use ssh command in brief?
Let me try my hand at a basic primer...
(1) SSH is used to login to a remote computer:
ssh u...@computer
Or:
ssh -l user computer
Where:
'user' is your username on the remote computer.
'computer' is the hostname of the remote computer, if it
has a DNS A
record or an entry in /etc/hosts, or the IP address.
Examples:
ssh ja...@argonaut
Logs in as 'jason' on the computer 'argonaut', assuming
that the IP
address for 'argonaut' is listed in the /etc/hosts file.
This approach
might be used on a small home network.
ssh ch...@global.proximity.on.ca
Logs in as 'chris' on the computer
'global.proximity.on.ca', where
'global.proximity.on.ca' has a correctly-configured DNS
entry so it can
be resolved into an IP address. This approach is used for
almost all
publicly-accessible machines.
ssh j...@172.16.16.1
Logs in as 'jane' on the computer with the IP address
172.16.97.1. With
this approach you need to know the IP address but don't
require an entry
in /etc/hosts or a DNS A record. This approach might be
used when
initially setting up some machines on a network.
These commands will give you shell access on the remote
machine, after
you have provided your password.
Additional information:
- You can leave the username out if it's exactly the same
as the
username under which you logged in to the local machine:
ssh global.proximity.on.ca
- You can add a command name if you want to run just one
command instead
of accessing a shell. For example, to run 'who' on
zenit.senecac.on.ca I
could use:
ssh ch...@zenit.senecac.on.ca
who
- Adding the '-C' option (note the capital letter) turns on
compression.
If you're going through a slow connection, this can improve
performance.
If you're on a local connection (LAN), don't bother.
- Adding the '-X' option (again, a capital letter) turns on
X11
forwarding. This lets you run a graphical command remotely
and have it
display locally, assuming that the local system has an X
server (e.g.,
the local computer is running Linux/BSD/Solaris/AIX/...
with a GUI, or
it's running OSX or Windows and an X server has been
started). For
example:
ssh -XC ch...@concord3 virt-manager
...will run the virt-manager application on concord3 and
display the
virt-manager graphical window on the local display. Note:
in some
situations, depending on the ssh server configuration, you
may need to
use '-Y' instead of '-X'. (Note that the -C option is also
being used
here; its use with -X is strongly recommended).
(2) You can use the related 'scp' secure copy utility (or,
alternately,
sftp) to transfer files to and from a remote system using
ssh:
scp u...@computer:/path/to/file name
This transfers /path/to/file from the account 'user' on the
remote
system 'computer' to 'name' on the local system. Note that
this is the
same syntax as the 'cp' (copy) command, except that
'u...@computer' is
placed in front of the source filename.
Examples:
scp ch...@concord3:/etc/services c3s
The file /etc/services on concord3 (using account name
'chris') is
transferred to the file 'c3s' in the local current
directory.
scp ch...@concord3:~/todo.txt .
The file 'todo.txt' in the home directory of user 'chris'
on 'concord3'
is transferred to the current directory ('.').
You can also transfer *to* a remote system, by putting the
u...@computer
part in front of the destination file:
scp todo.txt ja...@host3.example.com:/tmp/
The file 'todo.txt' on the local system (current directory)
is
transferred to the /tmp directory on the system
'host3.example.com'
using the account 'jason'.
(3) See the ssh documentation for information on how to use
ssh with
public/private keys, eliminating the need to constantly
retype the
password.
Hope this is useful--
--
Chris Tyler
--
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Re: ssh tutorial
gmspro wrote: I did this and it works for me. ssh a...@ipaddress But if I do ssh ipaddress ssh: connect to host ipaddress port 22: No route to host I would try ssh -v ipaddress and ssh -l abc ipaddress -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College Dublin -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
--- On Sat, 6/6/09, Timothy Murphy gayle...@eircom.net wrote: From: Timothy Murphy gayle...@eircom.net Subject: Re: ssh tutorial To: fedora-list@redhat.com Date: Saturday, June 6, 2009, 6:49 PM Uwe Kiewel wrote: yourname=linux user account // Am i correct? yourserver=?? No. ssh -l yourusername yourserver I also think,it is a wrong format. Correct format is : ssh yourn...@yourserver ssh username_at_remote_ser...@remote_server is also possible Apologies. I thought I had tried that in the past, and it did not work. But it seems fine now. -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College Dublin, Ireland -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
I would try ssh -v ipaddress This does not work. It says permission denied after giving the password three times. and ssh -l abc ipaddress Giving the same password this works. -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
2009/6/11 gmspro gms...@yahoo.com: --- On Sat, 6/6/09, Timothy Murphy gayle...@eircom.net wrote: From: Timothy Murphy gayle...@eircom.net Subject: Re: ssh tutorial To: fedora-list@redhat.com Date: Saturday, June 6, 2009, 6:49 PM Uwe Kiewel wrote: yourname=linux user account // Am i correct? yourserver=?? No. ssh -l yourusername yourserver I also think,it is a wrong format. Correct format is : ssh yourn...@yourserver Both a correct formats. ssh -l sam machine.mydomain.com == ssh s...@machine.mydomain.com -- Sam -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
ssh -l yourusername yourserver Sorry,It is also correct. I also think,it is a wrong format. Correct format is : ssh yourn...@yourserver -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
--- On Thu, 6/11/09, Sharpe, Sam J sam.sharpe+lists.red...@gmail.com wrote: From: Sharpe, Sam J sam.sharpe+lists.red...@gmail.com Subject: Re: ssh tutorial To: Community assistance, encouragement, and advice for using Fedora. fedora-list@redhat.com Date: Thursday, June 11, 2009, 4:18 PM 2009/6/11 gmspro gms...@yahoo.com: --- On Sat, 6/6/09, Timothy Murphy gayle...@eircom.net wrote: From: Timothy Murphy gayle...@eircom.net Subject: Re: ssh tutorial To: fedora-list@redhat.com Date: Saturday, June 6, 2009, 6:49 PM Uwe Kiewel wrote: yourname=linux user account // Am i correct? yourserver=?? No. ssh -l yourusername yourserver I also think,it is a wrong format. Correct format is : ssh yourn...@yourserver Both a correct formats. ssh -l sam machine.mydomain.com == ssh s...@machine.mydomain.com -- Sam Yes ,both are correct.Sorry for previous post. -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
2009/6/11 gmspro gms...@yahoo.com: I would try ssh -v ipaddress This does not work. It says permission denied after giving the password three times. and ssh -l abc ipaddress Giving the same password this works. Is your username on the machine you are ssh'ing from the same as your username on the machine you are ssh'ing to? If your username locally is USERLOCAL, then ssh -v ipaddress is equivalent to ssh -v userlo...@ipaddress or ssh -v -l USERLOCAL ipaddress If your usernames are the same, then the only way I can see ssh ipaddress failing while ssh -l username ipaddress succeeds is if your .ssh/config file has a specific username for that machine set - something like this: # cat .ssh/config Host1.2.3.4 Userremoteuser The -l argument to ssh would override that, but without the -l you would be trying to ssh -l remoteuser 1.2.3.4 -- Sam -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
Is your username on the machine you are ssh'ing from the same as your username on the machine you are ssh'ing to? Never, usernames are different. If your username locally is USERLOCAL, then ssh -v ipaddress is equivalent to ssh -v userlo...@ipaddress or ssh -v -l USERLOCAL ipaddress Username is not USERLOCAL If your usernames are the same, then the only way I can see ssh ipaddress failing while ssh -l username ipaddress succeeds is if your .ssh/config file has a specific username for that machine set - something like this: # cat .ssh/config There is no file like config in .ssh directory. There is only one file here: known_hosts Host 1.2.3.4 User remoteuser The -l argument to ssh would override that, but without the -l you would be trying to ssh -l remoteuser 1.2.3.4 -- Sam -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
2009/6/11 gmspro gms...@yahoo.com: Is your username on the machine you are ssh'ing from the same as your username on the machine you are ssh'ing to? Never, usernames are different. Well that is why ssh -l abc ipaddress and ssh a...@ipaddress work for you, but ssh ipaddress won't. You are trying to login to your remote machine with the username you use on your local machine! If you want to set it up so that you don't need to type the username, you need to investigate the .ssh/config file (man ssh_config for details) -- Sam -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
file (man ssh_config for details) That's a long tutorial.I will read this if possible. However thanks for your reply. -- Sam -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
On Sat, 2009-06-06 at 17:26 -0700, gmspro wrote: Many thanks. This is a great tutorial. It helps to learn basic uses of ssh. I was looking for this. It saved my time from googling and reading long man ssh page. One last thing,reading other mail from fedora-list I knew that I must be the ssh administrator for log-in using ssh. How can I be the ssh administrator?Is it possible for me? Or is there any ssh server(free) where I can log-in using ssh without bothering about being ssh server administration or concerning of having an account in remote computer by the ssh administration. Like telnet, ssh works in a client-server fashion. When one does telnet ja...@argonaut, one is running the telnet client on one's PC. One is connecting to the telnet daemon (telnet server) on the computer, argonaut. Similarly, when one does ssh ja...@argonaut, one is running the ssh client on one's PC. One is connecting to the ssh daemon (ssh server) on the computer, argonaut. To make this example concrete, let us first get specific information on a specific implementation of ssh. You might be using the ssh client from openssh. Please see the URL: http://openssh.com/ In the second paragraph, at the time of this message, they mention the ssh program, and they mention the program, sshd, calling sshd the server side of the package. The ssh program has a URL to the openbsd man page for ssh: http://www.openbsd.org/cgi-bin/man.cgi?query=sshsektion=1 The sshd program has a URL to the openbsd man page for sshd: http://www.openbsd.org/cgi-bin/man.cgi?query=sshdsektion=8 Let's say the name of your computer is jefferson. You wish to connect to the remote computer, argonaut. On the remote computer, argonaut, is the account, jason. On your computer, jefferson, you do the command, ssh ja...@argonaut. Your ssh client, on jefferson, will attempt to connect to the ssh server, running on the computer, argonaut. The user name, jason, needs to exist on the computer, argonaut. If you are supposed to give a password, the password will be the password used on the computer, argonaut. The ssh server administrator controls the computer, argonaut. He must set up the account, jason, on the computer, argonaut. He must allow people to ssh to the account, jason, on argonaut. He will configure what types of authentications are permitted. He will configure if you can enter the password for the account, jason, to log-in, or you need public key authentication. He will configure other options. I assume you are not the ssh server administrator for argonaut. I assume you do not control the computer, argonaut, in our example. If you did control the computer, argonaut, and were trying to connect to the computer, argonaut, from another computer, you would need to know how to configure the ssh server running on argonaut. Configuring a ssh server incorrectly is a security risk. If you need to do this, I would suggest you find a person, you trust, who has configured ssh servers before, to help you do this. You ask the question, could someone let you use ssh to connect to their computer without creating an account on their computer? The answer is no. They have to set up the account. They might set up an anonymous or guest account that allows limited access for a specific purpose, but that account, be it anonymous or guest must be set up. An anonymous account might be set up that lets you download publicly available source code for Linux using cvs. You wouldn't be able to do anything else. You wouldn't be able to use that account to do shell commands on their computer. You wish to use ssh to connect to the remote computer so you can issue shell commands. This requires a higher degree of trust. The people controlling the computer, argonaut, need to be able to identify who you are. They need to be able to trust you are who you say you are. signature.asc Description: This is a digitally signed message part -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
On Fri, 2009-06-05 at 23:39 -0700, gmspro wrote: Would anyone tell how to use ssh command in brief? ssh --help less brief man ssh Craig -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
Can anyone give an example how to log in remote computer with ssh? --- On Sat, 6/6/09, Craig White craigwh...@azapple.com wrote: From: Craig White craigwh...@azapple.com Subject: Re: ssh tutorial To: Community assistance, encouragement, and advice for using Fedora. fedora-list@redhat.com Date: Saturday, June 6, 2009, 1:51 PM On Fri, 2009-06-05 at 23:39 -0700, gmspro wrote: Would anyone tell how to use ssh command in brief? ssh --help less brief man ssh Craig -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
Some confusion ssh yourusern...@yourserver Here yourname=linux user account // Am i correct? yourserver=?? -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
gmspro wrote: Some confusion ssh yourusern...@yourserver Here yourname=linux user account // Am i correct? yourserver=?? No. ssh -l yourusername yourserver Or just ssh yourserver if the user name is the same on both machines. Nb The remote machine must be running sshd (and accept your connection). -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College Dublin, Ireland -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Timothy Murphy schrieb: gmspro wrote: Some confusion ssh yourusern...@yourserver Here yourname=linux user account // Am i correct? yourserver=?? No. ssh -l yourusername yourserver ssh username_at_remote_ser...@remote_server is also possible -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.7 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iQIVAwUBSioyzkJXG7BUuynnAQJXzw/7BAq38Y/j1kX8yGc6+88dPpAxz6KQiSbe QTeyD9rshAvsX2r5SCCQwEKE4XUi5N7Nkjw/KT9pwowRYNZgHeRd6dq8qWZeravh l90uV6cOyZnL46vPc5KEsI2at4h6+ueGQ2BYSNx5fZ7ldGY29z1cLSJmHJiUJNvT JcaHaMA5AK5quI7+AnEdLG6EXA1YGMk93I4Z57M/2F561ywVXONXxoQH/XYw+HUm N0By9UPhUc3etCCRY9KznjmdMcWdqg6jZ4Fri9JMsmUGIXqDleR5SBodNqsmSkGR PVFGY6Z4usXyJg1ZEtNXqcBJVOGK9fhzlo7H6uk9ov2Q65WxvMMCK5kcC0T0zViM FfiV181a+6dhG3ffpbH5comwT+1+yj92GXKvAx39IhJkUoQGrdOLDcvZU3HN1hO8 Mh+qOg9S342eOAZvJ4xrdq15RE2bkVm1dvvMU2NEb6Sc9Z0Sk0/uau0/HsP1JMRd ZyieVA7o9dPQfxNAW4CpFzeGqOG+j7JnXvT2bSNzd+IaywEA77o/luMhBh+FEI4U oXjCecJz17p0OA0Eb404qX/cQ8jyb2jyAsakOxU9u1+tDvH4IPFXvVvVMh6aYGTZ REQsYYMDaLgF72/FlOd91b3givCj7X0AYqkHUVLLzdg1TtccIOZy8fXQ0s5IbuQg 4O5SyhJo5y4= =p30L -END PGP SIGNATURE- -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
Thank you. Can you give a specific example of ssh yourserver What would be the yourserver? --- On Sat, 6/6/09, Timothy Murphy gayle...@eircom.net wrote: From: Timothy Murphy gayle...@eircom.net Subject: Re: ssh tutorial To: fedora-list@redhat.com Date: Saturday, June 6, 2009, 2:37 PM gmspro wrote: Some confusion ssh yourusern...@yourserver Here yourname=linux user account // Am i correct? yourserver=?? No. ssh -l yourusername yourserver Or just ssh yourserver if the user name is the same on both machines. Nb The remote machine must be running sshd (and accept your connection). -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College Dublin, Ireland -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
gmspro wrote: Thank you. Can you give a specific example of ssh yourserver ssh alpha.beta.gamma.org tries to login as yourself at alpha.beta.gamma.org where you have an account. On alpha.beta.gamma.org, sshd must be running. What would be the yourserver? --- On Sat, 6/6/09, Timothy Murphy gayle...@eircom.net wrote: From: Timothy Murphy gayle...@eircom.net Subject: Re: ssh tutorial To: fedora-list@redhat.com Date: Saturday, June 6, 2009, 2:37 PM gmspro wrote: Some confusion ssh yourusern...@yourserver Here yourname=linux user account // Am i correct? yourserver=?? No. ssh -l yourusername yourserver Or just ssh yourserver if the user name is the same on both machines. Nb The remote machine must be running sshd (and accept your connection). -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College Dublin, Ireland -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines -- Joachim Backes joachim.bac...@rhrk.uni-kl.de http://www.rhrk.uni-kl.de/~backes smime.p7s Description: S/MIME Cryptographic Signature -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
On Sat, 6 Jun 2009, gmspro wrote: Thank you. Can you give a specific example of ssh yourserver What would be the yourserver? i'm sorry but i have to ask -- do you actually know what the ssh command is supposed to do? seriously, asking how to use ssh, reproducing the sample line ssh yourserver and asking what to put in place of yourserver is like saying, i want to log into another machine with telnet. help tells me that the command is 'telnet othermachine'. what do i use for 'othermachine'? i apologize if that sounds harsh but, given that you've asked the same trivial question about four times now, i'm not convinced that you're ready for ssh. rday -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Annoying Kernel Pedantry. Web page: http://crashcourse.ca Linked In: http://www.linkedin.com/in/rpjday Twitter: http://twitter.com/rpjday -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
Thank you. Can you give a specific example of ssh yourserver What would be the yourserver? i'm sorry but i have to ask -- do you actually know what the ssh command is supposed to do? seriously, asking how to use ssh, reproducing the sample line ssh yourserver and asking what to put in place of yourserver is like saying, i want to log into another machine with telnet. help tells me that the command is 'telnet othermachine'. what do i use for 'othermachine'? i apologize if that sounds harsh but, given that you've asked the same trivial question about four times now, i'm not convinced that you're ready for ssh. rday -- Excellent resource: http://kimmo.suominen.com/docs/ssh/ Others are available: Google search - ssh tutorial -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
Uwe Kiewel wrote: yourname=linux user account // Am i correct? yourserver=?? No. ssh -l yourusername yourserver ssh username_at_remote_ser...@remote_server is also possible Apologies. I thought I had tried that in the past, and it did not work. But it seems fine now. -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College Dublin, Ireland -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
gmspro wrote: Thank you. Can you give a specific example of ssh yourserver What would be the yourserver? 1) You could use the IP address of the machine you are trying to connect to, eg ssh 192.168.1.4 2) Or if you have the name of the machine in your /etc/hosts you could use that, eg ssh joe 3) Or you could give the complete name of the machine, eg ssh maths.tcd.ie (Nb This won't work because you don't have an account on this machine, and even if you did you would have had to somehow get your public key, generated with ssh-keygen, into your .ssh directory on this machine. In other words, you need the blessing of the person running the remote machine.) Here yourname=linux user account // Am i correct? yourserver=?? No. ssh -l yourusername yourserver Or just ssh yourserver if the user name is the same on both machines. Note. I was wrong in saying that ssh yourn...@yourserver would not work. -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College Dublin, Ireland -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
On Fri, 2009-06-05 at 23:39 -0700, gmspro wrote:
Would anyone tell how to use ssh command in brief?
Let me try my hand at a basic primer...
(1) SSH is used to login to a remote computer:
ssh u...@computer
Or:
ssh -l user computer
Where:
'user' is your username on the remote computer.
'computer' is the hostname of the remote computer, if it has a DNS A
record or an entry in /etc/hosts, or the IP address.
Examples:
ssh ja...@argonaut
Logs in as 'jason' on the computer 'argonaut', assuming that the IP
address for 'argonaut' is listed in the /etc/hosts file. This approach
might be used on a small home network.
ssh ch...@global.proximity.on.ca
Logs in as 'chris' on the computer 'global.proximity.on.ca', where
'global.proximity.on.ca' has a correctly-configured DNS entry so it can
be resolved into an IP address. This approach is used for almost all
publicly-accessible machines.
ssh j...@172.16.16.1
Logs in as 'jane' on the computer with the IP address 172.16.97.1. With
this approach you need to know the IP address but don't require an entry
in /etc/hosts or a DNS A record. This approach might be used when
initially setting up some machines on a network.
These commands will give you shell access on the remote machine, after
you have provided your password.
Additional information:
- You can leave the username out if it's exactly the same as the
username under which you logged in to the local machine:
ssh global.proximity.on.ca
- You can add a command name if you want to run just one command instead
of accessing a shell. For example, to run 'who' on zenit.senecac.on.ca I
could use:
ssh ch...@zenit.senecac.on.ca who
- Adding the '-C' option (note the capital letter) turns on compression.
If you're going through a slow connection, this can improve performance.
If you're on a local connection (LAN), don't bother.
- Adding the '-X' option (again, a capital letter) turns on X11
forwarding. This lets you run a graphical command remotely and have it
display locally, assuming that the local system has an X server (e.g.,
the local computer is running Linux/BSD/Solaris/AIX/... with a GUI, or
it's running OSX or Windows and an X server has been started). For
example:
ssh -XC ch...@concord3 virt-manager
...will run the virt-manager application on concord3 and display the
virt-manager graphical window on the local display. Note: in some
situations, depending on the ssh server configuration, you may need to
use '-Y' instead of '-X'. (Note that the -C option is also being used
here; its use with -X is strongly recommended).
(2) You can use the related 'scp' secure copy utility (or, alternately,
sftp) to transfer files to and from a remote system using ssh:
scp u...@computer:/path/to/file name
This transfers /path/to/file from the account 'user' on the remote
system 'computer' to 'name' on the local system. Note that this is the
same syntax as the 'cp' (copy) command, except that 'u...@computer' is
placed in front of the source filename.
Examples:
scp ch...@concord3:/etc/services c3s
The file /etc/services on concord3 (using account name 'chris') is
transferred to the file 'c3s' in the local current directory.
scp ch...@concord3:~/todo.txt .
The file 'todo.txt' in the home directory of user 'chris' on 'concord3'
is transferred to the current directory ('.').
You can also transfer *to* a remote system, by putting the u...@computer
part in front of the destination file:
scp todo.txt ja...@host3.example.com:/tmp/
The file 'todo.txt' on the local system (current directory) is
transferred to the /tmp directory on the system 'host3.example.com'
using the account 'jason'.
(3) See the ssh documentation for information on how to use ssh with
public/private keys, eliminating the need to constantly retype the
password.
Hope this is useful--
--
Chris Tyler
--
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Re: ssh tutorial
On Fri, 2009-06-05 at 23:39 -0700, gmspro wrote: Would anyone tell how to use ssh command in brief? Cris gave a great explanation. and looking at the man page is also a must. In practical terms ssh replaces telnet so that your computer to computer connections can be accomplished with encrypted tcp/ip packets. You can establish computer to computer connections with telnet, but it does not customarily encrypt which means the content of your connection can be sniffed and understood by someone monitoring your network. ssh prevents the sniffer from understanding what is being sent from computer to computer. Because ssh is so much better than telnet, telnet servers are usually turned off and not used. Greg -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
Yes,I am not ssh administrator. Chris' explanation is good. May I suggest the original questioner needs to find the information needed to connect to that particular ssh server. The original questioner may need to talk with the person (ssh server administrator) who is running the ssh server. The ssh server administrator should have a cookbook telling how to connect to his server. I am assume the original questioner is not the ssh server administrator. The ssh server administrator can configure which ssh protocol version(s) of ssh will work, what types of authentication will work, whether X11 will will be forwarded, and many other options. The ssh server administrator can even force a particular user to execute a specific program when the user tries to connect. The ssh server administrator will need to create an account and make configuration changes to allow people to connect to that account. Sometimes, a ssh server administrator might create an anonymous account that runs a particular program, such as cvs to allow people to anonymously retrieve source code. In every case that I can think of, the original questioner will need to find documentation on how to connect or will need to talk with the ssh server administrator. I would also suggest, using the -v option on the ssh command. I believe one can type ssh -v -v -v u...@host From man ssh, -v Verbose mode. Causes ssh to print debugging messages about its progress. This is helpful in debugging connection, authentica- tion, and configuration problems. Multiple -v options increase the verbosity. The maximum is 3. The output from the -v -v -v options may help the ssh server administrator help the original questioner find out what is wrong when the original questioner tries to connect. -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
Re: ssh tutorial
Many thanks.
This is a great tutorial.
It helps to learn basic uses of ssh.
I was looking for this.
It saved my time from googling and reading long man ssh page.
One last thing,reading other mail from fedora-list I knew that I
must be the ssh administrator for log-in using ssh.
How can I be the ssh administrator?Is it possible for me?
Or is there any ssh server(free) where I can log-in using ssh without bothering
about being ssh server administration or concerning of having an account in
remote computer by the ssh administration.
--- On Sun, 6/7/09, Chris Tyler ch...@tylers.info wrote:
From: Chris Tyler ch...@tylers.info
Subject: Re: ssh tutorial
To: Community assistance, encouragement, and advice for using Fedora.
fedora-list@redhat.com
Date: Sunday, June 7, 2009, 12:04 AM
On Fri, 2009-06-05 at 23:39 -0700,
gmspro wrote:
Would anyone tell how to use ssh command in brief?
Let me try my hand at a basic primer...
(1) SSH is used to login to a remote computer:
ssh u...@computer
Or:
ssh -l user computer
Where:
'user' is your username on the remote computer.
'computer' is the hostname of the remote computer, if it
has a DNS A
record or an entry in /etc/hosts, or the IP address.
Examples:
ssh ja...@argonaut
Logs in as 'jason' on the computer 'argonaut', assuming
that the IP
address for 'argonaut' is listed in the /etc/hosts file.
This approach
might be used on a small home network.
ssh ch...@global.proximity.on.ca
Logs in as 'chris' on the computer
'global.proximity.on.ca', where
'global.proximity.on.ca' has a correctly-configured DNS
entry so it can
be resolved into an IP address. This approach is used for
almost all
publicly-accessible machines.
ssh j...@172.16.16.1
Logs in as 'jane' on the computer with the IP address
172.16.97.1. With
this approach you need to know the IP address but don't
require an entry
in /etc/hosts or a DNS A record. This approach might be
used when
initially setting up some machines on a network.
These commands will give you shell access on the remote
machine, after
you have provided your password.
Additional information:
- You can leave the username out if it's exactly the same
as the
username under which you logged in to the local machine:
ssh global.proximity.on.ca
- You can add a command name if you want to run just one
command instead
of accessing a shell. For example, to run 'who' on
zenit.senecac.on.ca I
could use:
ssh ch...@zenit.senecac.on.ca
who
- Adding the '-C' option (note the capital letter) turns on
compression.
If you're going through a slow connection, this can improve
performance.
If you're on a local connection (LAN), don't bother.
- Adding the '-X' option (again, a capital letter) turns on
X11
forwarding. This lets you run a graphical command remotely
and have it
display locally, assuming that the local system has an X
server (e.g.,
the local computer is running Linux/BSD/Solaris/AIX/...
with a GUI, or
it's running OSX or Windows and an X server has been
started). For
example:
ssh -XC ch...@concord3 virt-manager
...will run the virt-manager application on concord3 and
display the
virt-manager graphical window on the local display. Note:
in some
situations, depending on the ssh server configuration, you
may need to
use '-Y' instead of '-X'. (Note that the -C option is also
being used
here; its use with -X is strongly recommended).
(2) You can use the related 'scp' secure copy utility (or,
alternately,
sftp) to transfer files to and from a remote system using
ssh:
scp u...@computer:/path/to/file name
This transfers /path/to/file from the account 'user' on the
remote
system 'computer' to 'name' on the local system. Note that
this is the
same syntax as the 'cp' (copy) command, except that
'u...@computer' is
placed in front of the source filename.
Examples:
scp ch...@concord3:/etc/services c3s
The file /etc/services on concord3 (using account name
'chris') is
transferred to the file 'c3s' in the local current
directory.
scp ch...@concord3:~/todo.txt .
The file 'todo.txt' in the home directory of user 'chris'
on 'concord3'
is transferred to the current directory ('.').
You can also transfer *to* a remote system, by putting the
u...@computer
part in front of the destination file:
scp todo.txt ja...@host3.example.com:/tmp/
The file 'todo.txt' on the local system (current directory)
is
transferred to the /tmp directory on the system
'host3.example.com'
using the account 'jason'.
(3) See the ssh documentation for information on how to use
ssh with
public/private keys, eliminating the need to constantly
retype the
password.
Hope this is useful--
--
Chris Tyler
--
fedora-list mailing list
fedora-list@redhat.com
To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
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