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Top Forums UNIX for Dummies Questions & Answers group & user permission question Post 302224698 by redoubtable on Wednesday 13th of August 2008 06:55:53 PM
Old 08-13-2008
Be aware that the users will still be allowed on world writable directories (such as /tmp). Otherwise, you will got to stick with mcnamara's opinion on chroot(). Still, I must say chroot() is awfully easy to bypass without the proper kernel limitations (grsecurity).
 

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lgroupmod(1)						      General Commands Manual						      lgroupmod(1)

NAME
lgroupmod - Modify an user group SYNOPSIS
lgroupmod [OPTION]... group DESCRIPTION
Modifies the user group with name group. OPTIONS
-A, --admin-add=list Add users in comma-separated list among group's administrators. -a, --admin-remove=list Remove users in comma-separated list from group's administrators. Removing users that are not currently among group's administra- tors silently succeeds. -g, --gid=gid Change group's group ID to gid. -i, --interactive Ask all questions when connecting to the user database, even if default answers are set up in libuser configuration. -L, --lock Lock group. This prevents users from using the group password with newgrp(1) to become a member of group. -M, --member-add=list Add users in comma-separated list among group's members. -m, --member-remove=list Remove users in comma-separated list from group's members. Removing users that are not currently among group's members silently succeeds. -n, --name=name Rename group to name. -P, --plainpassword=password Set group's password to password. Note that the password can be viewed while running lgroupmod using tools such as ps(1). -p, --password=encrypted Set group's password to the password represented by the hash encrypted. Note that the hash can be viewed while running lgroupmod using tools such as ps(1). -U, --unlock Unlock group. EXIT STATUS
The exit status is 0 on success, nonzero on error. libuser Jan 11 2005 lgroupmod(1)
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