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Now that we know how to create users, it will be useful to understand how to 
remove them as well.
Removing users
Removing access is very important when a user no longer needs to access a system, 
as unmanaged accounts often become a security risk. To remove a user account, we'll 
use the 
userdel
 command.
Before removing an account, though, there is one very important question you 
should ask yourself. Will you still need access to the user's files? Most companies 
have retention policies in place that detail what should happen to a user's data when 
he or she leaves the organization. Sometimes, these files are copied into an archive 
for long-term storage. Often, a manager, coworker, or a new hire will need access to 
the former user's files, perhaps to continue working on a project where they left off. 
It's important to understand this policy ahead of managing users. If you don't have 
a policy in place that outlines retention requirements for files when users resign, you 
should probably work with your management and create one.
By default, the 
userdel
 command does not remove the contents of the user's 
home
 
directory. Here, we use the following command to remove 
dscully
 from the system:
sudo userdel dscully
We can see that the files for the 
dscully
 user still exist by entering the following 
command:
ls -l /home
The preceding commands will result in the following outputs:
Those of you with keen eyes will likely notice that the 
adduser
 
script is calling 
useradd
 to perform its actual work. So either way, 
you're either directly or indirectly using 
useradd
.

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Managing Users and Permissions