CompTIA Linux+ XK0-006 (V8) Practice Question

The correct command is lsof /var/log/syslog. The lsof (List Open Files) command is used to display information about files that are open by various processes. When given a file path as an argument, it will list all processes that have that specific file open, along with details like the PID, user, and command name. The ps -ef | grep /var/log/syslog command is incorrect because ps lists running processes, but grepping for a file path is not a reliable way to find which process has a file open, as the file path is not typically part of the process's command line information. The file /var/log/syslog command is used to determine the type of a file (e.g., ASCII text, binary), not which process is using it. The stat /var/log/syslog command displays detailed file metadata like size, permissions, and timestamps, but does not show process-related information.