chmod/chgrp/chown etc.

tigertim71 · 06-11-2009, 05:22 PM

Hi,

I've done su before doing the above commands eg.

Code:

su

chmod 644 tims-text
chgrp board tims-text

I am getting this message, even when I

Code:

cd

Code:

pwd

in root:

Code:

chmod: cannot access `tims-text': No such file or directory

and am getting nowhere - any ideas?

jamescondron · 06-11-2009, 05:33 PM

Well, at a guess, I'd say the file doesn't exist in that location.

j1alu · 06-11-2009, 07:39 PM

hi,
when you run cd as root, you go to /root, you need to cd /home/username/documents.
(if tims_file is in /home/username/documents)

tigertim71 · 06-13-2009, 07:36 AM

This stage appears to be ok - I went to ls -l, but there doesn't seem to be any changes in the preliminary numbers.

Code:

drwxr-xr-x 2 tim7 tim7 4096 2009-06-11 23:13 CV
-rw-r--r-- 1 tim7 tim7  951 2009-06-02 23:13 fstab
-rw-r--r-- 1 tim7 tim7    7 2009-06-07 19:25 mikes
-rw-r--r-- 1 tim7 tim7    6 2009-06-07 19:22 mikes-text

What's the number to make a file read only (so I'm guessing a number will change somewhere) & can I delete it afterwards?

repo · 06-13-2009, 07:46 AM

Take a look at
http://en.wikipedia.org/wiki/File_system_permissions

pixellany · 06-13-2009, 08:15 AM

Quote:

Originally Posted by tigertim71

This stage appears to be ok - I went to ls -l, but there doesn't seem to be any changes in the preliminary numbers.

Code:

drwxr-xr-x 2 tim7 tim7 4096 2009-06-11 23:13 CV
-rw-r--r-- 1 tim7 tim7  951 2009-06-02 23:13 fstab
-rw-r--r-- 1 tim7 tim7    7 2009-06-07 19:25 mikes
-rw-r--r-- 1 tim7 tim7    6 2009-06-07 19:22 mikes-text

What's the number to make a file read only (so I'm guessing a number will change somewhere) & can I delete it afterwards?

I can't relate this to your original question......

read-only for all users:
chmod 444 filename

read=4
write=2
execute=1

Add the numbers to get the combination you want--the numbers for the example you show are 644.

tigertim71 · 06-13-2009, 04:34 PM

OK- I basically found what I was looking for.

With

Code:

chmod 444 mikes

I got (after using cmd

Code:

ls -l

):

-r--r--r-- 1 tim7 tim7 7 2009-06-07 19:25 mikes

and with

Code:

chmod 644 mikes

:

-rw-r--r-- 1 tim7 tim7 7 2009-06-07 19:25 mikes

so I'm guessing that this is simply the difference between a file with read only and read-write permissions.

What I wanted to do was just understand the second stage, and how I could confirm that these commands had been executed.

pixellany · 06-14-2009, 08:48 AM

If you don't get an error message, then you should be able to assume that the command was executed correctly. If in doubt do ls -l to check.