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Full Discussion: Finding how done IT
Top Forums UNIX for Dummies Questions & Answers Finding how done IT Post 26929 by Neo on Monday 26th of August 2002 10:12:43 AM
Old 08-26-2002
In the future you might want to change the way you are managing user accounts. There are a number of ways to do this:

(1) The easiest (not very secure, but helps) is to simply not allow users to login directly as root from remote terminals. They must first login as 'themselves' and then 'su' to root.

(2) If you want more control, you could enable access control lists (ACLs) on your system and then only allow users to login as 'themselves' and then give them root / superuser rights/permissions for commands they need to do their work. This also turns on accounting so you can track exactly what they do.

There are other ways to help insure you can audit what others are doing. Very few, if any, experienced system administrators on a critical multi-user system allow direct remote superuser login.
 

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LEARN ABOUT MINIX

chsh

CHSH(1)                                                            User Commands                                                           CHSH(1)

NAME

       chsh - change login shell

SYNOPSIS

       chsh [options] [LOGIN]

DESCRIPTION

       The chsh command changes the user login shell. This determines the name of the user's initial login command. A normal user may only change
       the login shell for her own account; the superuser may change the login shell for any account.

OPTIONS

       The options which apply to the chsh command are:

       -h, --help
           Display help message and exit.

       -R, --root CHROOT_DIR
           Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory.

       -s, --shell SHELL
           The name of the user's new login shell. Setting this field to blank causes the system to select the default login shell.

       If the -s option is not selected, chsh operates in an interactive fashion, prompting the user with the current login shell. Enter the new
       value to change the shell, or leave the line blank to use the current one. The current shell is displayed between a pair of [ ] marks.

NOTE

       The only restriction placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker is the superuser,
       and then any value may be added. An account with a restricted login shell may not change her login shell. For this reason, placing /bin/rsh
       in /etc/shells is discouraged since accidentally changing to a restricted shell would prevent the user from ever changing her login shell
       back to its original value.

FILES

       /etc/passwd
           User account information.

       /etc/shells
           List of valid login shells.

       /etc/login.defs
           Shadow password suite configuration.

SEE ALSO

       chfn(1), login.defs(5), passwd(5).

shadow-utils 4.5                                                    01/25/2018                                                             CHSH(1)
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