Love for the Linux Users

It never hurts to have a quick reference for Linux administration commands, so I wanted to put out some helpful items for user, file, directory, and group management. Linux Commands for managing users: adduser - Command used to add user accounts. chage  - Used to change the time the user’s password will expire. chfn - Change a user’s finger information chsh - Change a user’s shell. chgrp - Changes the group ownership of files. chown - Change the owner of file(s ) to another user. gpasswd - Used to administer the /etc/group file. groupadd - Create a new group. grpconv - Creates /etc/gshadow from the file /etc/group which converts to shadow passwords. grpunconv- Uses the files /etc/passwd and /etc/shadow to create /etc/passwd, then deletes /etc/shadow which converts from shadow passwords. groupdel - Delete a group groupmod - Modify a group groups - print the groups a user is in grpck - Verify the integrity of group files. id - Print group or user ID numbers for the specified user. newgrp - Allows a user to log in to a new group. newusers - Update and create new users in batch form. nologin - Prevent non-root users from logging onto the system. passwd - Used to update a user’s password. The command “passwd username” will set the password for the given user. pwconv - Used to create the file /etc/shadow from the file /etc/passwd to convert to shadow passwords. pwunconv - Uses the files /etc/passwd and /etc/shadow to create /etc/passwd, then deletes /etc/shadow to convert from shadow passwords. su  - run a shell with substitute user and group IDs useradd...