Many think the
passwd command only changes a user's password. Although passwd does perform this important function, it contains other features, as well.The most important function of
passwd is indeed changing a user's password. By following the rules set forth in the configuration files /etc/security/user and /etc/security/passwd, a standard user can change his or her own password or, if logged in as the root user, can change other users' passwords, as Listing shows.Listing Using passwd to change a user's password
# lsuser -c -a password xander
#name:password
xander:*
# passwd xander
Changing password for "xander"
xander's New password:
Enter the new password again:
# lsuser -c -a password xander
#name:password
xander:!
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The
passwd command can also change a user's GECOS information like chfn or his or her shell/command to execute during the login process, like chsh. Listing provides an example.Listing Using passwd to change a user's information
# passwd -f xander
xander's current gecos:
"Xander Cormany,317.555.1234"
Change (yes) or (no)? > yes
To?>Xander Cormany,317.555.7890
# passwd -s xander
Current available shells:
/bin/sh
/bin/bsh
/bin/csh
/bin/ksh
/bin/tsh
/bin/ksh93
/usr/bin/sh
/usr/bin/bsh
/usr/bin/csh
/usr/bin/ksh
/usr/bin/tsh
/usr/bin/ksh93
/usr/bin/rksh
/usr/bin/rksh93
/usr/sbin/uucp/uucico
/usr/sbin/sliplogin
/usr/sbin/snappd
xander's current login shell:
/usr/bin/ksh
Change (yes) or (no)? > yes
To?>/usr/bin/bsh
# finger xander
Login name: xander In real life: Xander Cormany
Site Info: 317.555.7890
Directory: /home/xander Shell: /usr/bin/bsh
No Plan.
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