limitation of user a/c ( telnet service )

[edwardspl at ita.org.mo]

Dear All,

How can we limit a user a/c when telnet to the server :
eg :

[edward at svr1 ~]$ ls -l -a
total 36
drwx------ 3 edward edward 4096 Feb 6 22:51 .
drwxr-xr-x 5 root root 4096 Feb 6 22:50 ..
-rw------- 1 edward edward 14 Feb 6 22:52 .bash_history
-rw-r--r-- 1 edward edward 24 Feb 6 22:50 .bash_logout
-rw-r--r-- 1 edward edward 176 Feb 6 22:50 .bash_profile
-rw-r--r-- 1 edward edward 124 Feb 6 22:50 .bashrc
drwxr-xr-x 3 edward edward 4096 Feb 6 22:50 .kde
-rw-r--r-- 1 edward edward 658 Feb 6 22:50 .zshrc
[edward at svr1 ~]$

Prevent user "edward" from doing the following :
modify / del the exiting files ( default by the system ).

Allow user "edward" create / del / modify other his own files / dirs.

Edward.
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