Users, Groups, Privileges & Ownership

Create group/user
[root]# groupadd webuser
[root]# useradd -g me126904 webuser

Change permission
[root]# chmod a+x myscript.sh
[root]# chmod g-rwx yourscript.sh
[root]# chmod u+rwx g-rx o-rxw yourscript.sh

Change ownership
[root]# chown -R me126904.webuser phpweb/

Change group
[root]# chgrp -hR users /phpweb

Delete user
[root]# userdel -r me126904

Check current user
[root]# who