Change existing variable value only user enters non-empty string.

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LEARN ABOUT DEBIAN

lusermod

lusermod(8)						      System Manager's Manual						       lusermod(8)

NAME

       lusermod - Modify an user

SYNOPSIS

       lusermod [OPTION]... user

DESCRIPTION

       Modifies the user with name user.

OPTIONS

       -c, --gecos=gecos
	      Set user's GECOS field to gecos.	The GECOS field is traditionally used to store user's real name and other information.

       -d, --directory=directory
	      Set user's home directory to directory.

       -g, --gid=gid
	      Change  user's  primary  group ID to gid.  If group with ID gid does not exist, a warning is printed, but the operation is performed
	      anyway.

       -i, --interactive
	      Ask all questions when connecting to the user database, even if default answers are set up in libuser configuration.

       -L, --lock
	      Lock user's account.  This prevents logging in using user's password.

       -l, --login=name
	      Rename user to name.

       -m, --movedirectory
	      After changing user's home directory (using the -d option), move the old home directory to the new location.

       -P, --plainpassword=password
	      Set user's password to password.	Note that the password can be viewed while running lusermod using tools such as ps(1).

       -p, --password=encrypted
	      Set user's password to the password represented by the hash encrypted.  Note that the hash can  be  viewed  while  running  lusermod
	      using tools such as ps(1).

       -s, --shell=shell
	      Set user's login shell to shell.

       -U, --unlock
	      Unlock user's account.

       -u, --uid=uid
	      Change user's user ID to uid.

EXIT STATUS

       The exit status is 0 on success, nonzero on error.

libuser 							    Feb 27 2008 						       lusermod(8)

Shell Programming and Scripting