Linux User Management -3__linux

Root user created directory Normal user does not have write permission, you can change the file's owning group by

For example: 1.groupadd softadm Add a group. 2.usermod-g softadm username (gpasswd-a user name Softadm) 3.chgrp softadm/software Change Directory-owning group, 4.chmod G+w/software

Pwck Detect/etc/passwd File error

VIPW edit/etc/passwd file can lock this file and other users cannot edit it

ID View User ID and group information

Finger View User Details

Passwd-s View User Password status

Who,w View current logged-in user information

Su-User plus-after can switch environment variables such as user's host directory

Lock User:

PASSWD-L user name-U for unlocking some need to be-uf (usermod-l username can be locked)

The principle of locking: In the MD5 encrypted password before the join!!, you can edit the user password by editing Vi/etc/shadow password before joining!!

Delete User:

Manual deletion: Use the Find command to locate a file belonging to a user or group of users Find/home-user (-uid,-group,-gid) to find a user file

User Management commands

Chage Set Password (This command is only for Linux)

-L View User password settings

-M password modified minimum days

-M maximum Days

-D Password Modification date

Number of days to lock accounts after the-l password expires

-E

-W