What is Linux? How do you list files in a directory? How do you change file permissions? What is a shell? How do you check disk usage? How do you create a file? What is the root user? How do you move files? How do you copy files? What is a symlink? How do you delete a file? What is the difference between su and sudo? How do you update a package? How do you check the Linux version? What is a process? How do you kill a process? How do you search for a file? What is a cron job? How do you edit a file in Vim? What is the grep command used for? How do you view running processes? How do you switch users? How do you install software? What is the /etc directory for? How do you set environment variables? What is the purpose of the chmod command? How do you check network configuration? What is a package manager? How do you find the IP address? How do you compress files? What is a daemon? How do you reboot the system? How do you change the hostname? What is SSH? How do you check system uptime? What is a swap space? How do you mount a drive? What is the df command used for? How do you create a directory? How do you add a user? How do you change a password? What is a firewall? How do you configure a network interface? What is top used for? How do you check memory usage? What is a kernel? How do you run a script? What is the awk command used for? How do you schedule a task with at? How do you exit a terminal session?