chsh - change login shell
chsh [-s login_shell] [user]
chsh 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 their own account, the super user may change the login shell
for any account.
The only restrictions 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 their 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 every changing their login
shell back to its original value.
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 field, or leave the line blank to use the current
value. The current value is displayed between a pair of [ ] marks.
The file, /etc/login.defs, defines some configuration options that
affects how chsh operates, especially for non-root users.
/etc/passwd - user account information
/etc/shells - list of valid login shells
/etc/login.defs - config options for chsh
chfn(1), passwd(5), login.defs(5)
Julianne Frances Haugh (firstname.lastname@example.org)
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