Linux Professional Certificate (LPIC)

Zawadi is studying for his Linux Professional Certificate Exam (LPIC). Please give him 10 sample questions and their detailed answers.

Certainly! Here are ten sample questions for the LPIC exam, along with their detailed answers:

Question 1: What is the command to list all the files, including hidden ones, in a directory in long format?

Answer: The command would be ls -la. This command lists all files, including the hidden ones (files starting with a dot), and displays detailed information such as file permissions, number of links, owner, group, size, and time of last modification.

Question 2: How can you redirect the output of a command to a file, overwriting the file if it already exists?

Answer: You can use the > operator. For example, echo "Hello, World" > output.txt will redirect the text "Hello, World" to a file named output.txt, overwriting it if it already exists.

Question 3: What is the purpose of the chmod command in Linux?

Answer: chmod, which stands for "change mode", is used to change the permissions of a file or directory. It can modify the read, write, and execute permissions for the owner, group, and others.

Question 4: How do you search for a specific string within files in a directory recursively?

Answer: You can use the grep command along with the -r or --recursive option. For example, grep -r "search_string" /path/to/directory will search for "search_string" recursively in the specified directory.

Question 5: How do you create a symbolic link in Linux?

Answer: You can use the ln command with the -s option. For example, ln -s target_file link_name creates a symbolic link named link_name that points to target_file.

Question 6: What is the primary function of the apt-get command?

Answer: apt-get is a package management command-line tool used in Debian and Ubuntu distributions. It is used to handle packages, allowing the user to install, upgrade, and remove packages and their dependencies.

Question 7: How can you view the last ten lines of a file in Linux?

Answer: You can use the tail command. For instance, tail -n 10 filename will display the last ten lines of the specified file.

Question 8: How do you add a new user to a group in Linux?

Answer: You can use the usermod command. For example, usermod -aG groupname username will add the user username to the group groupname.

Question 9: How can you find the IP address of a Linux machine from the command line?

Answer: You can use the ip command. Executing ip addr show or ip a will display detailed network interface information, including the IP address.

Question 10: What is the purpose of the df command in Linux?

Answer: The df command, standing for "disk filesystem", is used to display the amount of disk space used and available on the filesystems of the system. Executing df -h provides the information in a human-readable format, showing sizes in GB, MB, or KB as needed.

These questions cover various basic aspects and common tasks related to Linux administration. Good luck to Zawadi in his LPIC exam preparation!