Usermod - Revision history

Woozle: moved to htyp

2005-10-14T18:33:05Z

moved to htyp

← Older revision		Revision as of 18:33, 14 October 2005
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	~~[[Category:Linux Shell Commands]]~~		{{to htyp}}
	~~[[Techniques]]: [[Linux]]: [[usermod]]~~
	~~==Manpage Text==~~
	~~===Name===~~
	~~:'''usermod''' - Modify a [[Linux:user\|user]] account~~

	~~===Synopsis===~~
	:usermod [-c <u>comment</u>] [-d <u>home_dir</u> [ -m]] [-e <u>expire_date</u>] [-f <u>inactive_time</u>] [-g <u>initial_group</u>] [-G <u>group</u>[,...]] [-l <u>login_name</u>] [-p <u>passwd</u>] [-s <u>shell</u>] [-u <u>uid</u> [ -o]] [-L\|-U] <u>login</u>
	~~===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 <u>comment</u>'''
	*:The new value of the user's password file comment field. It is normally modified using the [[chfn]](1) utility.
	*'''-d <u>home_dir</u>'''
	*: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 <u>expire_date</u>'''
	*:The date on which the user account will be disabled. The date is specified in the format YYYY-MM-DD.
	*'''-f <u>inactive_days</u>'''
	*: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>'''
	*:The [[Linux:group\|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>,[...]'''
	*:A list of supplementary [[Linux:group\|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]]
	*'''-l <u>login_name</u>'''
	*: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 <u>passwd</u>'''
	*:The encrypted password, as returned by [[crypt]](3).
	*'''-s <u>shell</u>'''
	*:The name of the user's new login shell. Setting this field to blank causes the system to select the default login shell.
	*'''-u <u>uid</u>'''
	*: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.
	*'''<u>login</u>''' 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 (jfh@austin.ibm.com)~~
	~~==Edit Log==~~
	*2005-06-12 Transcribed from manpage in Red Hat 7

Woozle: /* Description */ addendum to -G option

2005-09-15T00:06:12Z

Description: addendum to -G option

← Older revision		Revision as of 00:06, 15 September 2005
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	*'''-G <u>group</u>,[...]'''		*'''-G <u>group</u>,[...]'''
	*:A list of supplementary [[Linux:group\|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		*:A list of supplementary [[Linux:group\|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]]
	*'''-l <u>login_name</u>'''		*'''-l <u>login_name</u>'''
	*: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.		*: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.

Woozle: added note about meaning of "login"

2005-06-12T22:18:31Z

added note about meaning of "login"

← Older revision		Revision as of 22:18, 12 June 2005
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	*'''-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.		*:Unlock a user's password. This removes the '!' in front of the encrypted password. You can't use this option with -p or -L.
			*'''<u>login</u>''' is the username whose parameters are to be changed.

	===Caveats===		===Caveats===

Woozle: /* Description */

2005-06-12T16:23:11Z

Description

← Older revision		Revision as of 16:23, 12 June 2005
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	*: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 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.		*:The [[Linux:group\|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 ~~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		*:A list of supplementary [[Linux:group\|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
	*'''-l <u>login_name</u>'''		*'''-l <u>login_name</u>'''
	*: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.		*: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.
Line 34:		Line 34:
	*'''-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.		*:Unlock a user's password. This removes the '!' in front of the encrypted password. You can't use this option with -p or -L.

	===Caveats===		===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.		[[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.

Woozle: /* Name */

2005-06-12T16:20:43Z

Name

← Older revision		Revision as of 16:20, 12 June 2005
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	==Manpage Text==		==Manpage Text==
	===Name===		===Name===
	:'''usermod''' - Modify a user account		:'''usermod''' - Modify a [[Linux:user\|user]] account

	===Synopsis===		===Synopsis===
	:usermod [-c <u>comment</u>] [-d <u>home_dir</u> [ -m]] [-e <u>expire_date</u>] [-f <u>inactive_time</u>] [-g <u>initial_group</u>] [-G <u>group</u>[,...]] [-l <u>login_name</u>] [-p <u>passwd</u>] [-s <u>shell</u>] [-u <u>uid</u> [ -o]] [-L\|-U] <u>login</u>		:usermod [-c <u>comment</u>] [-d <u>home_dir</u> [ -m]] [-e <u>expire_date</u>] [-f <u>inactive_time</u>] [-g <u>initial_group</u>] [-G <u>group</u>[,...]] [-l <u>login_name</u>] [-p <u>passwd</u>] [-s <u>shell</u>] [-u <u>uid</u> [ -o]] [-L\|-U] <u>login</u>

Woozle at 16:19, 12 June 2005

2005-06-12T16:19:12Z

New page

[[Category:Linux Shell Commands]]
[[Techniques]]: [[Linux]]: [[usermod]]
==Manpage Text==
===Name===
:'''usermod''' - Modify a user account
===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
*'''-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.
===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 (jfh@austin.ibm.com)
==Edit Log==
*2005-06-12 Transcribed from manpage in Red Hat 7