Users, Groups and Permissions in Linux

Introduction to Linux Installing Linux Basic Linux Tasks VIM for File Editing Navigation in Linux Purpose of Class This class teaches students how to manage users, groups and permissions in a Linux enviornment. Topics Covered Adding and Deleting Users Editing the passwd File Which Contains User Configurations Changing User Passwords Adding and Deleting Groups Adding and Deleting Users from Groups Editing the group Configuration File Understanding Permission Numbering System Changing User and Group Ownership for Files and Folders Class Notes Users Add User = sudo adduser username Change User password = sudo passwd username Delete User = sudo userdel username Edit Users Configuration File = sudo vim /etc/passwd (shows usernames, names of users, home directories) Groups Sudo groupadd groupname Sudo groupdel groupname Sudo vim /etc/group (shows groups and users) Permissions Numbers = owner/group/everyone else 4 = read, 2 = write, 1 = execute To Chanege Permissions of a File or Folder = sudo chmod 777 file/folder (-R for recursive) Changing Ownership To Change User Ownership = sudo chown -R username file/folder To Change Group Ownership =sudo chgrp –R groupname file/folder -R for Recursive for Folders

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