MAN page from RedHat 5.X shadow-utils-980403-3.i386.rpm
Section: Maintenance Commands (8)Index
usermod - Modify a user account
- [-ccomment][-dhome_dir [-m]]
command modifies the system account files to reflectthe changes that are specified on the command line.The options which apply to the usermod
- -c comment
- The new value of the user's password file comment field.It is normally modified using the chfn(1) utility.
- -d home_dir
- The user's new login directory.If the -m option is given the contents of the current home directorywill be moved to the new home directory, which is created if it does notalready exist.
- -e expire_date
- The date on which the user account will be disabled.The date is specified in the format MM/DD/YY.
- -f inactive_days
- The number of days after a password expires until the accountis permanently disabled.A value of 0 disables the account as soon as the password hasexpired, and a value of -1 disables the feature.The default value is -1.
- -g initial_group
- The group name or number of the user's new initial login group.The group name must exist. A group number must refer to analready existing group.The default group number is 1.
- -G group,[...]
- A list of supplementary groups which the user is also a memberof.Each group is separated from the next by a comma, with nointervening whitespace.The groups are subject to the same restrictions as the groupgiven with the -g option.If the user is currently a member of a group which is not listed,the user will be removed from the group
- -l login_name
- The name of the user will be changed from login tologin_name.Nothing else is changed.In particular, the user's home directory name should probablybe changed to reflect the new login name.
- -s shell
- The name of the user's new login shell.Setting this field to blank causes the systemto select the default login shell.
- -u uid
- The numerical value of the user's ID.This value must be unique, unless the -o option is used.The value must be non-negative.Values between 0 and 99 are typically reserved for system accounts.Any files which the user owns and which are located in the directorytree rooted at the user's home directory will have the file user IDchanged automatically.Files outside of the user's home directory must be altered manually.
will not allow you to change the name of a user who islogged in.You must make certain that the named user is not executing any processeswhen this command is being executed if the user's numerical user ID isbeing changed.You must change the owner of any crontab files manually.You must change the owner of any at jobs manually.You must make any changes involving NIS on the NIS server.
/etc/passwd - user account information
/etc/shadow - secure user account information
/etc/group - group information
Julianne Frances Haugh (jfhAATTtab.com)
- SEE ALSO
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