You have been tasked with deleting a user account on a Linux server, and you must ensure that the user's home directory and mail spool is also removed. Which command should you execute?
userdel --remove-all-files username
deluser --remove username
usermod --delete username
userdel -r username
The correct command is userdel -r username. The -r option removes the user's home directory and mail spool along with the user account itself. Without the -r option, the account will be deleted, but the home directory and mail spool would remain on the system. The usermod command is for modifying an existing user account, not deleting it. The deluser command does not exist by default in most Linux distributions, and userdel --remove-all-files is incorrect because the --remove-all-files option is not a valid option for the userdel command.
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