* Option B (Correct):Theuseraddcommand with-mcreates a home directory for the user, and the-s /bin
/bashoption assigns the Bash shell. However, no password is set when the user is created withuseraddunless explicitly done with thepasswdcommand afterward.
* Option A (Incorrect):There is no mention of adding the user to thewheelgroup; theuseraddcommand does not imply this.
* Option C (Incorrect):The command does not automatically set a password; it only creates the user account with the specified shell.
* Option D (Incorrect):The-moption ensures that a home directory is created.
Oracle Linux Reference:Refer to:
* OracleLinux 8: Managing Users and Groups

Explanation of Answer B:The commandssh -L 5011:127.0.0.1:80 [email protected] -f sleep 30creates a local port forward. This means port5011on the client machine is forwarded to port80on the remote machine (10.10.2.20) using the SSH connection.
Explanation of Answer E:The-foption of thesshcommand causes the SSH connection process to fork to the background after authentication is complete. Thesleep 30command keeps the SSH connection alive for 30 seconds.

The530 Permission deniederror indicates that the user is not allowed to log in. In vsFTPd, if theUSERLIST_ENABLEoption is set toYESin/etc/vsftpd/vsftpd.conf, and theoracleuser is listed in/etc/vsftpd
/user_list, that user is explicitly denied access to the FTP server.