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Full Discussion: lock an account
Top Forums Shell Programming and Scripting lock an account Post 302236436 by avronius on Monday 15th of September 2008 01:37:54 PM
Old 09-15-2008
root will still be able to su to the user. A test would be to su to a user that does not have root access - and try to su - to the locked user.

If you want to completely disable the account, change the default shell to /bin/false. This is a shell that doesn't exist, so will not allow root to su to it.

Code:
usermod -s /bin/false username

*LK* belongs in the second field, but again, you SHOULD NOT manually manipulate this file.

Last edited by avronius; 09-15-2008 at 02:40 PM.. Reason: added some clarity
 

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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 4.1.5.1 05/25/2012 CHSH(1)
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