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Old 04-13-2006, 12:34 AM   #1
olbaid
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Some simple newbie questions


How do you doing the following?

- Change the server so that the default permissions on all newly created files are -rw- rw- r--/
- Change permissions on all files currently in the /tmp directory to 751
- Put back the passwords from the /etc/shadow file back in the /etc/passwd file

Thanks in advance...
 
Old 04-13-2006, 01:20 AM   #2
pixellany
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Homework, by any chance??

What server are you referring to? Is it one that you have administrator access to?

"Put back the passwords"---Why were they moved? In /etc/shadow, are they not encrypted?

Change permissions is done with chmod. "man chmod" for the details of the syntax.
 
Old 04-13-2006, 01:24 AM   #3
Simon Bridge
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You havn't told us which distro this is...
In general

- change server for file permissions ...
For me, I am using nautilus in FC4, and it has always done this. New files are always -rw-rw-r-- unless they are directories, in which case they are drwxrwxr-x because you need execution permission to view the directory contents.

So: what do you mean by "server"?

- change permissions of all files in temp dire to 751

chmod 751 /temp/*

for eg... on a spare directory of files I have:
Code:
# ls -l
total 640
-rw-r--r--  1 simon simon   2748 Jun 24  2005 general11.gif
-rw-r--r--  1 simon simon   2885 Jun 24  2005 general12.gif
-rw-r--r--  1 simon simon   7434 May 14  2005 kowhai_gold.jpg
[extra listings deleted]
# chmod 751 *
# ls -l
total 640
-rwxr-x--x  1 simon simon   2748 Jun 24  2005 general11.gif
-rwxr-x--x  1 simon simon   2885 Jun 24  2005 general12.gif
-rwxr-x--x  1 simon simon   7434 May 14  2005 kowhai_gold.jpg
[extra listings deleted]
#
man chmod for more detail. (Though, why you would want "others" to be able to execute files they cannot see, escapes me.)

- put passwords back into /etc/passwd
Why on earth would you want to do that?
http://geodsoft.com/howto/password/

Last edited by Simon Bridge; 04-13-2006 at 01:26 AM.
 
Old 04-13-2006, 01:36 AM   #4
raskin
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1. I guess umask 0111 (in the login script of every user)
2. chmod -R 0751 /tmp
 
Old 04-13-2006, 01:47 AM   #5
Simon Bridge
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umask 0113 for -rw-rw-r-- surely?
 
Old 04-13-2006, 01:50 AM   #6
raskin
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Oops, it's my typo..
 
Old 04-13-2006, 02:19 AM   #7
olbaid
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Sorry the distro is SuSE 9.0
 
Old 04-13-2006, 02:51 AM   #8
timmeke
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The umask can go in /etc/bashrc (for all bash shells) or /etc/profile (for all logins).

As for the chmod, the OP asked to change only the permissions on files, not subdirectories of /tmp.
So I suppose he'll be needing a script like this:
Code:
for i in `ls /tmp`; do
  if ( -f /tmp/$i ); then
    chmod 751 /tmp/$i;
  fi;
done;
or use a find command like:
Code:
find /tmp -type f -maxdepth 1 -exec chmod 751 {} \;
As for moving the passwords from shadow to passwd file, I agree with Simon_Bridge. They were put (encrypted) in the shadow file for a security reason. So, keep them in there.

Last edited by timmeke; 04-13-2006 at 10:59 AM.
 
Old 04-13-2006, 03:41 AM   #9
Simon Bridge
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olbaid: please put your distro in your profile. Thank you.
 
  


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