linux--User and user group permissions

One, CentOS user rights related files

1./etc/passwd    (User rights information file)

[User name]:[password placeholder]:[user id]:[Group id]:[user description Information]:[user home directory]:[executable]

Users with "Bin/bash" in the [executable] section can log on normally, and users who are "Sbin/nologin" cannot log on.

2./etc/shadow   (user password file)

3./etc/group   (group file)

[Group name]:[Group Password placeholder]:[Group ID]

4./etc/gshadow   (group password file)

5./home/lihanx     (user home directory)

6./var/spool/mail/lihanx    (user mailbox file)

Second, user management related commands

ID lihanx     (view user lihanx information)

 Tom   (add new user Tom and specify uid=1000)
                            -G            
                                        -D (Specify home directory)
                                        -S (Specify user shell)
                                        -C (Specify user description information)

[[email protected] ~]# userdel-r Tom      (delete tom User and related information)

[Email protected] ~]# Usermod-D       (                            )-G                            -ug

linux--User and user group permissions