Questions:

1. Which command is used to display the available disk space on mounted filesystems in a human-readable format in Linux?

du
df
fspace
diskstat

2. In Linux, what is the purpose of the "sudo" command?

Switch user
Execute a command with superuser privileges
Create a new user
Start a secure session

3. What is the 'chroot' bind mount vulnerability, and how can it be mitigated?

It is a vulnerability that allows an attacker to escape the chroot jail; it can be mitigated by using "chroot" with the "-r" option.
It is a vulnerability in the "chroot" command that can be exploited using symbolic links; it can be mitigated by disabling symbolic links in the filesystem.
It is a vulnerability that allows an attacker to access files outside the chroot jail using bind mounts; it can be mitigated by using read-only bind mounts.
It is a vulnerability that affects user authentication; it can be mitigated by using strong passwords.

4. Which file contains the DNS resolver configuration in Linux?

/etc/hosts
/etc/dns.conf
etc/resolv.conf
/etc/networks

5. What is the purpose of the "chown" command in Linux?

Change the user's password
Change file ownership
Change the system hostname
Change the shell prompt