Adding a linux user/group and modifying user's primary group

Adding a linux user/group and modifying the primary group of the user.

Steps:

[root@localhost ~]# groupadd bigdata

[root@localhost ~]# grep -i bigdata /etc/group
bigdata:x:1001:
[root@localhost ~]#

[root@localhost ~]# useradd -m hadoop

[root@localhost ~]# id hadoop
uid=1001(hadoop) gid=1002(hadoop) groups=1002(hadoop)

[root@localhost ~]# ls -altr /home/hadoop
total 12
-rw-r--r--. 1 hadoop hadoop 231 Mar 31  2020 .bashrc
-rw-r--r--. 1 hadoop hadoop 193 Mar 31  2020 .bash_profile
-rw-r--r--. 1 hadoop hadoop  18 Mar 31  2020 .bash_logout
drwxr-xr-x. 4 root   root    35 Mar  1 02:00 ..
drwx------. 2 hadoop hadoop  62 Mar  1 02:00 .

[root@localhost ~]# usermod -g bigdata hadoop

[root@localhost ~]# ls -altr /home/hadoop
total 12
-rw-r--r--. 1 hadoop bigdata 231 Mar 31  2020 .bashrc
-rw-r--r--. 1 hadoop bigdata 193 Mar 31  2020 .bash_profile
-rw-r--r--. 1 hadoop bigdata  18 Mar 31  2020 .bash_logout
drwxr-xr-x. 4 root   root     35 Mar  1 02:00 ..
drwx------. 2 hadoop bigdata  62 Mar  1 02:00 .

[root@localhost ~]#

[root@localhost ~]# passwd hadoop
Changing password for user hadoop.
New password:
BAD PASSWORD: The password is shorter than 8 characters
Retype new password:
passwd: all authentication tokens updated successfully.
[root@localhost ~]#

<<<<<<<<<<< set a strong password

Now logged in as hadoop.

Last failed login: Mon Mar  1 02:06:41 EST 2021 from gateway on ssh:notty
Last login: Mon Mar  1 02:06:20 2021

[hadoop@localhost ~]$

[hadoop@localhost ~]$ ls -altr
total 16
-rw-r--r--. 1 hadoop bigdata 231 Mar 31  2020 .bashrc
-rw-r--r--. 1 hadoop bigdata 193 Mar 31  2020 .bash_profile
-rw-r--r--. 1 hadoop bigdata  18 Mar 31  2020 .bash_logout
drwxr-xr-x. 4 root   root     35 Mar  1 02:00 ..
-rw-------. 1 hadoop bigdata   5 Mar  1 02:06 .bash_history
drwx------. 2 hadoop bigdata  83 Mar  1 02:06 .
[hadoop@localhost ~]$

This closes this blog.Thanks