You need to modify a configuration file on a Linux server, but you don't have root access. What's the safest way to edit the file?

• Open the file directly in a text editor.
• Request root access from the administrator.
• Use the sudo command with the appropriate editor.
• Use a graphical file manager with root privileges.

You're working on a critical system configuration file. What's the BEST practice before making changes?

• Edit the file directly and save your work.
• Make the changes and reboot the system immediately.
• Create a backup copy of the original file before editing.
• Use the touch command to modify the file's timestamp.

You're editing a long log file and need to find a specific error message. Which command-line tool would be most helpful?

• cp
• mv
• grep
• rm

You accidentally delete a line of text while editing a file. How can you recover the lost line if you haven't saved the file yet?

• The changes are permanently lost.
• Use the history command to view past edits.
• Most text editors have an undo function (often Ctrl+Z).
• Restart the system and hope for the best.

You're collaborating with a teammate on a shell script. Which editor is known for its ease of use and clear visual interface?

• nano
• vi
• emacs
• All of the above

You need to edit a file that requires root privileges. What command would you use to open the file for editing with nano while using sudo?

• sudo nano filename.txt
• su nano filename.txt
• nano sudo filename.txt
• root nano filename.txt

You're working on a configuration file with sensitive information. How can you ensure the contents aren't displayed on your screen while editing?

• There's no way to hide the content.
• Use a graphical editor with a password prompt.
• Use the /dev/null trick with your editor.
• None of the above

You're editing a file containing website configuration data. How can you efficiently add comments to explain specific sections?

• Use the # symbol at the beginning of the line.
• Use quotation marks around the commented text.
• Bold or italicize the commented text.
• Add the comments at the end of the file.

You want to insert a line of text in the middle of a file. How can you achieve this using a text editor?

• Open the file in read-only mode.
• Use the arrow keys to navigate to the desired location.
• Search for a specific keyword and insert the line after.
• None of the above

You're working on a script and realize you need to copy a block of code from another file. Which command-line tool can help you achieve this?

• find
• cat
• cp
• mv