[Ilugc] doubt on ssh connection
hai techies, would pls any one sort out the following questions... 1.how do we restart the 20 apache servers within 2 minutes using ssh connection. 2.how do we find out how many connections established to mysql database or apache server(number of hits) 3.when we using the top command on what basis it will give priority to display the process 4.main difference between linux filesystem vs windows filesystem 5.how do we filter the warning log message from /var/log/maillog 6.Is it necessary a windows user having id in linux box for accesing a file using in samba server 7.Default block size in linux 8. A system has 2 nic cards..how do we check which one is up or which one is down ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] doubt on ssh connection
1.how do we restart the 20 apache servers within 2 minutes using ssh connection. script it with password-less SSH. 3.when we using the top command on what basis it will give priority to display the process By default, based on CPU utilization. But you can change this using top's interactive commands. Read man top. 4. main difference between linux filesystem vs windows Linux use single Hierarchical FS, which starts with /. Windoz follow multiple hierarchical FS and each one linked with a drive(C,D,..). 5. how do we filter the warning log message from /var/log/maillog Use grep with appropriate pattern and redirect the output to an another file. 7.Default block size in linux FS Block size is variable. By default 4096. 8. A system has 2 nic cards. how do we check which one is up Use ifconfig or ip command and use the Mac to identify the NIC. Bye :) -- Bharathi S ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] doubt on ssh connection
I think U got the most of ur question's answer 7.Default block size in linux for finding default block size, u can see this command with o/p *tune2fs -l /dev/sda1 | grep Block* Block count: 4980736 Block size: 4096 Blocks per group: 32768 ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] doubt on ssh connection
On Mon, Apr 5, 2010 at 2:47 PM, venkat raman infoappu.li...@gmail.com wrote: hai techies, would pls any one sort out the following questions... 1.how do we restart the 20 apache servers within 2 minutes using ssh connection. On different machines? Why do you want to do it? Not a good idea. In case you want to do it, setup automatic keying by $ ssh-keygen -t rsa (give no password) $ cat ~/.ssh/id_rsa.pub | ssh remote cat ~/.ssh/authorized_keys And start ssh-agent -s like this in case you use bash. `ssh-agent -s` This is the hard part. You should see $ ssh-add -l should list your key fingerprint. Then your automated login is working. Then write a simple script like this. for i in `cat machines` do ssh $i apachectl restart done That is it. 2.how do we find out how many connections established to mysql database or apache server(number of hits) Apache log contains everything. access.log. There are several visualizers and log analyzers out there. A simple grep can also take you there. mysql I dunno. A lot of LUGGies use it. Ask them. 3.when we using the top command on what basis it will give priority to display the process top does not assign priorities. OS assigns. Read up the nice command. Lower the number, higher the priority. 4.main difference between linux filesystem vs windows filesystem I dunno how to answer this one. I have not gone deep into either. A file system should be judged by its ability to perform well with many small files or few large files and not tire the hard disk. It should also recover from crashes well. Linux file system was immature but with time it is improving I think. As to Windoze, of course it is worse than linux. When I say Linux file systems are not up to the mark I mean in relation to absolute terms or with other superior file systems. Well I am too ignorant to comment any further. 5.how do we filter the warning log message from /var/log/maillog Use grep -v. 6.Is it necessary a windows user having id in linux box for accesing a file using in samba server No. 7.Default block size in linux Used to 512 bytes. Not sure about now. You can easily find it out. 8. A system has 2 nic cards..how do we check which one is up or which one is down Just look at the LEDs. If you see a green and an amber light glowing on one, you know it is up. -Girish -- Gayatri Hitech web: http://gayatri-hitech.com SpamCheetah Spam filter: http://spam-cheetah.com ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] doubt on ssh connection
On Mon, Apr 5, 2010 at 2:47 PM, venkat raman infoappu.li...@gmail.com wrote: 1.how do we restart the 20 apache servers within 2 minutes using ssh connection. You might want to look at FUNC. but this would need initial setup. https://fedorahosted.org/func/ alternatively u can go the SSH path. setup key based logins any simple script should do. 2.how do we find out how many connections established to mysql database or apache server(number of hits) netstat might be a simple way. I am not sure if MYSQL let's u query that. 3.when we using the top command on what basis it will give priority to display the process CPU, but you can change the sorting order.. check manpage 5.how do we filter the warning log message from /var/log/maillog One way is you can setup your syslog to log the messages to a different file. the default Syslog/rsyslog, doesn't offer you much room, you can look at syslog-ng. It is pretty good might just meet you requirement. 6.Is it necessary a windows user having id in linux box for accesing a file using in samba server No 7.Default block size in linux 4K i guess. Not sure 8. A system has 2 nic cards..how do we check which one is up or which one is down ethtool - Kiran ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] doubt on ssh connection
8. A system has 2 nic cards..how do we check which one is up or which one is down ethtool Also try, mii-tool -v (both your NICs should support MII). S. Baskar CEO/LinuXpert Systems ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] doubt on ssh connection
2.how do we find out how many connections established to mysql database or apache server(number of hits) use apachetop ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
