Manage user and group accounts and related system files

create a home directory with -m

set user password with passwd

adduser to group with usermod

run id temba to see if user is member of the group

add a group called finance with groupadd

make temba a group administrator with gpasswd -A

su to temba and see if you can add yourself as a member of a group with gpasswd -a

run id and see that temba is not a member of the group finance

less /etc/group and see that temba is an administrator of the group, by looking at the ::

exit the su context

create a directory /finance and copy some file to it.

change the group on /finance with chgrp -r /finance - this will make all files owned by the finance group

change the permissions on the directory and files so they are only accessible by the owner and group.

i.e chmod -R 660 /finance/* and change the directory to chmod 770 /finance

su to temba and observe that you cannot list the /finance directory or any file in it.

use the gpwasswd -a temba command to make temba a member of the group finance

observer that temba can enter the /finance directory and read files and create new ones

exit su

run groupdel finance. and do a ls -l /. Notice that the group id is displayed and not the group name.

this is because deleting a group does not change ownership of files owned by that group.

remove the /finance directory