[User management]--several commands for user function

Finger Command Query User information
Option parameters:
-S: Lists only the user's account number, full name, terminal code and login time, etc.;
-M: List the same person as the account followed, not the partial match (including the full name part)

View user Information # finger lyjlogin:lyj                        /home/lyj                    Shell:/bin/bashnever Lin.  No Mail. No Plan.

View the currently logged on system user and logon time # fingerlogin     Name       Tty      Idle Login hours   Office     Office Phoneroot      root       tty1        2 00:38root      root       pts/0    1:08  2 05:22 (10.0.2.29) root      root       pts/1  2 05:26 (10.0.2.29)

ID command to view the UID, GID, and group information of the user

# ID lyjuid=503(lyj) gid=503(lyj) group =503 (lyj)

W who whoami command

view currently logged in to the system users and various information # W -: $: -Up13:08, 3Users, load average:0.00,0.00,0.00USER TTY from [email protected] IDLE jcpu PCPU whatroot tty1-00:38 8:25m 22.57s 0.16s-bashroot pts/0 10.0.2.29 05:22 1:14m 0.06s 0.06s-bashroot pts/1 10.0.2.29 05:26 0.00s 0.22s 0.09s w# W.H.O.Root Tty1 .- ,- Geneva xx: -Root pts/0-08-02 05:22 (10.0.2.29)Root pts/1-08-02 05:26 (10.0.2.29)

view currently logged on user #  WhoAmI Root

Lastlog command

View User Last Login time # lastlog user name           port     from             last login time root             pts/1    10.0.  2.29        28 Month  2: £º                                        * * Never logged in * *daemon                                     * * Never logged in * *

[User management]--several commands for user function