Difference between revisions of "cmd/usermod/archive/Red Hat 7"
Jump to navigation
Jump to search
(→Examples: fixed formatting, made note that command doesn't seem to work) |
m (Woozle moved page usermod/archive/Red Hat 7 to cmd/usermod/archive/Red Hat 7: reorganizing command pages) |
||
| (2 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
| − | + | [[category:manpages]] | |
| + | [[category:Red Hat]] | ||
| + | [[category:Red Hat 7]] | ||
==Manpage Text== | ==Manpage Text== | ||
===Name=== | ===Name=== | ||
| − | : | + | : [[usermod]] - Modify a [[Linux users|user]] account |
===Synopsis=== | ===Synopsis=== | ||
| − | : | + | : [[usermod]] {{arg|-c <u>comment</u>}} {{arg|-d <u>home_dir</u> [ -m]}} {{arg|-e <u>expire_date</u>}} {{arg|-f <u>inactive_time</u>}} {{arg|-g <u>initial_group</u>}} {{arg|-G <u>group</u>[,...]}} {{arg|-l <u>login_name</u>}} {{arg|-p <u>passwd</u>}} {{arg|-s <u>shell</u>}} {{arg|-u <u>uid</u> [ -o]}} {{arg|-L<nowiki>|</nowiki>-U}} <u>login</u> |
===Description=== | ===Description=== | ||
The usermod command modifies the system account files to reflect the changes that are specified on the command line. The options which apply to the usermod command are | The usermod command modifies the system account files to reflect the changes that are specified on the command line. The options which apply to the usermod command are | ||
| Line 18: | Line 20: | ||
*:The number of days after a password expires until the account is permanently disabled. A value of 0 disables the account as soon as the password has expired, and a value of -1 disables the feature. The default value is -1. | *:The number of days after a password expires until the account is permanently disabled. A value of 0 disables the account as soon as the password has expired, and a value of -1 disables the feature. The default value is -1. | ||
*'''-g <u>initial_group</u>''' | *'''-g <u>initial_group</u>''' | ||
| − | *:The [[Linux | + | *:The [[Linux/groups|group]] name or number of the user's new initial login group. The group name must exist. A group number must refer to an already existing group. The default group number is 1. |
*'''-G <u>group</u>,[...]''' | *'''-G <u>group</u>,[...]''' | ||
| − | *:A list of supplementary [[Linux | + | *:A list of supplementary [[Linux/groups|group]]s which the user is also a member of. Each group is separated from the next by a comma, with no intervening whitespace. The groups are subject to the same restrictions as the group given 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 |
**'''Addendum''': groups are separated by commas without spaces, e.g. "-G ''group1'',''group2'',''group3''". --[[User:Woozle|Woozle]] | **'''Addendum''': groups are separated by commas without spaces, e.g. "-G ''group1'',''group2'',''group3''". --[[User:Woozle|Woozle]] | ||
*'''-l <u>login_name</u>''' | *'''-l <u>login_name</u>''' | ||
| Line 43: | Line 45: | ||
*'''/etc/group''' - group information | *'''/etc/group''' - group information | ||
===See Also=== | ===See Also=== | ||
| − | + | [[chfn]](1), [[chsh]](1), [[crypt]](3), [[groupadd]](8), [[groupdel]](8), [[groupmod]](8), [[passwd]](1), [[useradd]](8), [[userdel]](8) | |
===Author=== | ===Author=== | ||
| Line 49: | Line 51: | ||
==Examples== | ==Examples== | ||
The "/usr/sbin/" prefix may or may not be necessary depending on how your [[Linux distro]] is set up. | The "/usr/sbin/" prefix may or may not be necessary depending on how your [[Linux distro]] is set up. | ||
| − | * /usr/sbin/ | + | * /usr/sbin/usermod -G <u>group1</u>,<u>group2</u>,<u>group3</u> <u>username</u> |
| − | ** Joins user <u>username</u> to groups <u>group1</u>, <u>group2</u>, and <u>group3</u>, and unjoins from any other groups (get list of existing groups with " | + | ** Joins user <u>username</u> to groups <u>group1</u>, <u>group2</u>, and <u>group3</u>, and unjoins from any other groups (get list of existing groups with "groups <u>username</u>"). <u>Group</u>s may be identified by name or by ID; see {{l/sub|/etc/group|pfx=Linux/files}} for list of groups and IDs. |
** ''this doesn't seem to work -- usermod returns a quick guide to proper usage --[[User:Woozle|Woozle]] 01:16, 20 June 2010 (UTC)'' | ** ''this doesn't seem to work -- usermod returns a quick guide to proper usage --[[User:Woozle|Woozle]] 01:16, 20 June 2010 (UTC)'' | ||
| − | * | + | * usermod -G <u>groupname</u> -a <u>username</u> |
** Adds user <u>username</u> to group <u>groupname</u> without removing user from any other groups. | ** Adds user <u>username</u> to group <u>groupname</u> without removing user from any other groups. | ||
==Edit Log== | ==Edit Log== | ||
*2005-06-12 Transcribed from manpage in Red Hat 7 | *2005-06-12 Transcribed from manpage in Red Hat 7 | ||
Latest revision as of 22:52, 13 November 2022
Manpage Text
Name
Synopsis
- usermod <-c comment> <-d home_dir [ -m]> <-e expire_date> <-f inactive_time> <-g initial_group> <-G group[,...]> <-l login_name> <-p passwd> <-s shell> <-u uid [ -o]> <-L|-U> login
Description
The usermod command modifies the system account files to reflect the changes that are specified on the command line. The options which apply to the usermod command are
- -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 directory will be moved to the new home directory, which is created if it does not already exist.
- -e expire_date
- The date on which the user account will be disabled. The date is specified in the format YYYY-MM-DD.
- -f inactive_days
- The number of days after a password expires until the account is permanently disabled. A value of 0 disables the account as soon as the password has expired, 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 an already existing group. The default group number is 1.
- -G group,[...]
- A list of supplementary groups which the user is also a member of. Each group is separated from the next by a comma, with no intervening whitespace. The groups are subject to the same restrictions as the group given 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
- Addendum: groups are separated by commas without spaces, e.g. "-G group1,group2,group3". --Woozle
- -l login_name
- The name of the user will be changed from login to login_name. Nothing else is changed. In particular, the user's home directory name should probably be changed to reflect the new login name.
- -p passwd
- The encrypted password, as returned by crypt(3).
- -s shell
- The name of the user's new login shell. Setting this field to blank causes the system to 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 directory tree rooted at the user's home directory will have the file user ID changed automatically. Files outside of the user's home directory must be altered manually.
- -L
- Lock a user's password. This puts a '!' in front of the encrypted password, effectively disabling the password. You can't use this option with -p or -U.
- -U
- Unlock a user's password. This removes the '!' in front of the encrypted password. You can't use this option with -p or -L.
- login is the username whose parameters are to be changed.
Caveats
usermod will not allow you to change the name of a user who is logged in. You must make certain that the named user is not executing any processes when this command is being executed if the user's numerical user ID is being 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.
Files
- /etc/passwd - user account information
- /etc/shadow - secure user account information
- /etc/group - group information
See Also
chfn(1), chsh(1), crypt(3), groupadd(8), groupdel(8), groupmod(8), passwd(1), useradd(8), userdel(8)
Author
Julianne Frances Haugh (jfhspam@spamaustin.ibmspam.spamcom)
Examples
The "/usr/sbin/" prefix may or may not be necessary depending on how your Linux distro is set up.
- /usr/sbin/usermod -G group1,group2,group3 username
- Joins user username to groups group1, group2, and group3, and unjoins from any other groups (get list of existing groups with "groups username"). Groups may be identified by name or by ID; see /etc/group for list of groups and IDs.
- this doesn't seem to work -- usermod returns a quick guide to proper usage --Woozle 01:16, 20 June 2010 (UTC)
- usermod -G groupname -a username
- Adds user username to group groupname without removing user from any other groups.
Edit Log
- 2005-06-12 Transcribed from manpage in Red Hat 7