5 Simple Linux user modification methods on linux with /etc/passwd file.

4. Now make the second field blank.

[root@kalwa1 ~]# cat /etc/passwd|grep -i uxtechno
uxtechno::500:500::/home/uxtechno:/bin/bash
[root@kalwa1 ~]#

This time the user uxtechno able to login to system without password!!!!

 

5. Create the blank file “/etc/nologin”

[root@kalwa1 ~]# touch /etc/nologin
[root@kalwa1 ~]#

This makes the entire users unable to connect with the system except the root user.