August 25 Jobs

Useradd

useradd [options] LOGIN

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-R: Create a System user

-U uid: can specify uid;

-G GID: Specifies the base group to which the user belongs, which must exist beforehand

-C: comment some information

-d/path/to/somewhere: Specifies the user's home directory path;

-S shell: Sets the user's default shell;/bin/bash those

-G GID,... : Specifies the additional group to which it belongs;

Groupadd: Creating Groups

Groupadd [OPTIONS] GROUPNAME

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-G GID: indicates the group ID;

-R: Create a system group;

ID: View user-related ID information;

ID [OPTION] ... [USER]

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-u:uid

-g:gid

-g:groups

-n:name

Su:switch User, switching users or executing commands as other users;

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Su USERNAME: non-complete switching, non-login switching

su-username or su-l USERNAME: full switch, login switch

Usermod: User Property modification

usermod [OPTION] ... LOGIN

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-u uid modifies the value of the UID

-G gid modifies the value of GID

-G Gid[,gid,...] : Modify the additional group to which the user belongs

-S Shell, modifying the user Shell location

-C: Modify annotation information

-D home: when the user's home directory is modified to a new location, the user's original file is not moved to the new home;the-M option allows it to be moved to a new home directory at the same time;

note the location of the parameter, and the target directory cannot exist beforehand

-L : Account renaming

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passwd: To add a password to the user, ordinary users can change their own, the administrator can change everyone

passwd [OPTION] [UserName]

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-L: Lock account

-u: unlock

-N mindays: minimum term of use; Unit is day

-x maxdays: Default is 99999 days;

-W warndays: Alarm date, first n days of expiration date

-I inactivedays: Inactive days, expiry can give you really long time to struggle

Userdel: Deleting users

Userdel [-R] USERNAME

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-R: Delete theuser's home directory at the same time;

Groupmod: Group Property Modification

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groupmod [OPTION] GROUPNAME

-N Modify group name

-G Modify GID

gpasswd: Set password for group

NEWGRP: Toggles the base group for the specified group

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Groupdel: Deleting a group

Chage: Modify the properties of user account and password

chage [OPTION] ... LOGIN

-D Specify modified date

-e Specifies the number of days to expire

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August 25 Jobs