Manage User and Group

From here we discuss some basic commands which used for basic administartion of User & Group in a Server.

#w Login deatils + on which terminal.

#pwd To know present working directory.

#uname To print system information.

#man {command name} A man page (manual page) is a form of software documentation usually found on a Unix-like operating system. 

Add User:

#adduser {new username}

Root user's USER ID will always '0'. Other created users USER ID always above '1000'.

The user deatils will write in /etc/passwd, user can see the file by #cat /etc/passwd

Home folder for the user will be /home/{username} and there will be 3 hidden file will be created

.profile .bashrc .logout

#chfn {username} To edit user details.

#passwd {username} To change password of user name.
#useradd -G {group name} {user name} To add a user to a group.

Add Group

Every user is part of a group, a administrator can change group of a user and also can set or permission to a group so it will automatically set for users in that group.

#groupadd {group name}

Root user's GROUP ID will always '0'. Other created users GROUP ID always above '1000'.

#usermod -G {group name} {username} to add a user to group.

#id -nG {group name} to view the users in group.

#groupdel {group name} to delete a group.
#groupmod -n {new group name} {old group name} To change group name. 
#chgrp {new group} {file name} -R Changes the group that has access to a file or directory.