Correct permission for home directory

2013-07-13 Thread Paul Smith
Dear All,

I was playing with the permissions of

/home
/home/psmith

because of the issue reported in previous posts.

Could someone please tell me the commands to restore the correct
permissions to those both directories?

In previous posts, some people recommended

chmod 755 /home

But what about

/home/psmith

?

Thanks in advance,

Paul
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Re: Correct permission for home directory

2013-07-13 Thread lee
Paul Smith  writes:

> chmod 755 /home
>
> But what about
>
> /home/psmith

It depends on what you want.  There is some tradition that home
directories are readable for everyone and writable for their owners
only.  It may be a good idea to make them readable for their owners only
--- or a bad idea like when you're exporting directories in homes
through apache (which I think is a very bad idea).

In case you have users in groups that need to access someones home
directory, you may want to allow group access.  When you have convoluted
requirements, you may want to use ACLs to accomplish what you need ...


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Re: Correct permission for home directory

2013-07-13 Thread Paul Smith
On Sat, Jul 13, 2013 at 3:47 PM, lee  wrote:
>> chmod 755 /home
>>
>> But what about
>>
>> /home/psmith
>
> It depends on what you want.  There is some tradition that home
> directories are readable for everyone and writable for their owners
> only.  It may be a good idea to make them readable for their owners only
> --- or a bad idea like when you're exporting directories in homes
> through apache (which I think is a very bad idea).
>
> In case you have users in groups that need to access someones home
> directory, you may want to allow group access.  When you have convoluted
> requirements, you may want to use ACLs to accomplish what you need ...

Thanks, Lee. I have done the following:

chmod 755 /home
chown psmith /home/psmith
chmod -R u=rwx,g=,o= /home/psmith

I hope those have left my system secure!

Paul
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Re: Correct permission for home directory

2013-07-13 Thread lee
Paul Smith  writes:

> On Sat, Jul 13, 2013 at 3:47 PM, lee  wrote:
>>> chmod 755 /home
>>>
>>> But what about
>>>
>>> /home/psmith
>>
>> It depends on what you want.  There is some tradition that home
>> directories are readable for everyone and writable for their owners
>> only.  It may be a good idea to make them readable for their owners only
>> --- or a bad idea like when you're exporting directories in homes
>> through apache (which I think is a very bad idea).
>>
>> In case you have users in groups that need to access someones home
>> directory, you may want to allow group access.  When you have convoluted
>> requirements, you may want to use ACLs to accomplish what you need ...
>
> Thanks, Lee. I have done the following:

yvw :)

> chmod 755 /home
> chown psmith /home/psmith
> chmod -R u=rwx,g=,o= /home/psmith
>
> I hope those have left my system secure!

I'd be wondering what 'g=,o=' actually does.  You may want

chmod u+rwx,go-rwx /home/psmith

and you probably do *not* want to set all files in /home/psmith to be
executable for their owner like you set them with '-R u=x'.

Be careful with chmod.  About twenty years ago when I had my first Linux
installation, I messed it up with chmod when I wanted to edit some files
and it won't let me.  I decided to re-install because all the
permissions were messed up and some things didn't work anymore.

That has been the only time I actually had to re-install a Linux
distribution, except for when switching from i386 to amd64.  Talk about
reliability ...


BTW, iirc there's also some settings for shells like bash that specify
the default mode to use when creating files which you may want to look
at.


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Re: Correct permission for home directory

2013-07-13 Thread James Hogarth
>
> I'd be wondering what 'g=,o=' actually does.  You may want
>
> chmod u+rwx,go-rwx /home/psmith
>
> and you probably do *not* want to set all files in /home/psmith to be
> executable for their owner like you set them with '-R u=x'.

Indeed the better option is chmod -R u=rwX,go-rwx /home/psmith ... Note the
capital X to only set the execute bit on directories.

Incidentally if you are the only user of this system all this talk of the
right permissions for your home directory to secure it is pretty moot ;-)
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Re: Correct permission for home directory

2013-07-14 Thread Junk

On 14 Jul 2013, at 02:24, lee  wrote:

> Paul Smith  writes:
> 
>> On Sat, Jul 13, 2013 at 3:47 PM, lee  wrote:
 chmod 755 /home
 
 But what about
 
 /home/psmith
>>> 
>>> It depends on what you want.  There is some tradition that home
>>> directories are readable for everyone and writable for their owners
>>> only.  It may be a good idea to make them readable for their owners only
>>> --- or a bad idea like when you're exporting directories in homes
>>> through apache (which I think is a very bad idea).
>>> 
>>> In case you have users in groups that need to access someones home
>>> directory, you may want to allow group access.  When you have convoluted
>>> requirements, you may want to use ACLs to accomplish what you need ...
>> 
>> Thanks, Lee. I have done the following:
> 
> yvw :)
> 
>> chmod 755 /home
>> chown psmith /home/psmith
>> chmod -R u=rwx,g=,o= /home/psmith
>> 
>> I hope those have left my system secure!
> 
> I'd be wondering what 'g=,o=' actually does.  You may want
> 
> 
You'd be wanting to take a peek in the man page for chmod then. They're 
designed for exactly what he's done. 

Junk. 
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