Which of the following characters in a shell indicates the shell is running with superuser (root) privileges?

• ~

• #

• $

• >

Which symbol can be used with the cd command to change the current directory to the current user's home directory?

• ~

• #

• $

• >

Which character starts a comment line in a shell script file?

• ~

• #

• $

• >

When creating a bash script, which of the following must be placed in the first line to make it executable?

• ~!/tmp/exe

• &!/etc/sh

• $!/var/log

• #!/bin/bash

Which of the following linux commands will display processes that are running on the operating system? (Choose two)

• ps aux

• cat

• top

• powershell

You want to view the last tools installed by a user with the apt command. Which file contains this information?

• /var/log/apt/history.log

• /etc/apt/sources.list

• /var/lib/apt/lists/installed_packages

• /usr/share/apt/recent_installs

Instead of using password-based authentication, which option is more secure for connecting to a remote server?

• Telnet

• Open authentication

• Rsa-based authentication

• Key-based authentication

Which tool or protocol allows us to establish key-based authentication for connecting to a remote server?

• SSH key pairs

• TLS key

• SNMP keys

• FTP

How can you create SSH key pairs with the RSA type and 4096 bits?

• ssh-create -t rsa -b 4096

• ssh-generate -rsa -b 4096

• ssh rsa 2048

• ssh-keygen -t rsa -b 4096

When generating SSH key pairs using ssh-keygen, which files are created for authentication purposes?

• auth_rsa and auth_rsa.pub

• private_key and public_key

• id_rsa and id_rsa.pub

• ssh_private and ssh_public