How to Add or Remove Linux User From Group : Linux OS

How to Add or Remove Linux User From Group ?

Add the User to a Group in Linux

[root@0.0.0.0~]# usermod -aG wheel atharv

[root@0.0.0.0~]#

[root@0.0.0.0~]#

[root@0.0.0.0~]#

[root@0.0.0.0~]#

[root@0.0.0.0~]# id atharv

uid=1002(atharv) gid=1002(dba) groups=1002(dba),10(wheel)

[root@0.0.0.0~]#

Remove the User from a Group in Linux

[root@0.0.0.0~]#

[root@0.0.0.0~]# gpasswd -d atharv wheel

Removing user atharv from group wheel

[root@0.0.0.0~]#

[root@0.0.0.0~]#

[root@0.0.0.0~]# id atharv

uid=1002(atharv) gid=1002(dba) groups=1002(dba)

[root@0.0.0.0~]#

[root@0.0.0.0~]#

Your account has expired; please contact your system administrator : Linux OS

Re-Enable user In Linux : Your account has expired; please contact your system administrator

[atharv@0.0.0.0~]$

[atharv@0.0.0.0~]$ su - atharv

Password:

Your account has expired; please contact your system administrator

su: User account has expired

[atharv@0.0.0.0~]$

Login as root user :

[root@0.0.0.0home]# chage -l atharv

Last password change                                    : May 18, 2023

Password expires                                        : never

Password inactive                                       : never

Account expires                                         : May 18, 2023

Minimum number of days between password change          : 0

Maximum number of days between password change          : 99999

Number of days of warning before password expires       : 7

[root@0.0.0.0home]#

[root@0.0.0.0home]#

[root@0.0.0.0home]#

[root@0.0.0.0home]#

[root@0.0.0.0home]# chage --expiredate 2023-05-19 atharv

[root@0.0.0.0home]#

[root@0.0.0.0home]#

[root@0.0.0.0home]# chage --list atharv

Last password change                                    : May 18, 2023

Password expires                                        : never

Password inactive                                       : never

Account expires                                         : May 19, 2023

Minimum number of days between password change          : 0

Maximum number of days between password change          : 99999

Number of days of warning before password expires       : 7

[root@0.0.0.0home]#

How to get public IP from AWS EC2 instance ?

 

Use Below command 

login as root 

curl http://checkip.amazonaws.com

[root@ip-173-11-11-11 ~]#

[root@ip-173-11-11-11~]# curl http://checkip.amazonaws.com

55.2232.1123.123341

[root@ip-173-11-11-11 ~]#