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A Linux user is unable to write to a file named 'report.txt' located in a directory they own. Which of the following commands should the system administrator use to BEST resolve this issue?
chmod u+w report.txt
chown :usergroup report.txt
chmod 777 report.txt
chmod a+wx report.txt
The correct answer is 'chmod u+w report.txt', as the use of the 'chmod' command with the 'u+w' option grants the user (owner) of the file write permissions. This aligns most closely with the presented scenario, where a user is unable to write to their own file. The other options either set overly permissive rights, change group ownership which may not be needed, or use an invalid option.
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