Which command kills all of the processes associated with the terminal pts/0?

• A. pkill -u user
• B. pkill -f pts/0
• C. pkill -t pts/0
• D. killall -t pts/0

Answer: (C)

Targeting all processes on a specific terminal is done by pkill with a terminal filter. The correct approach uses the -t option followed by the terminal name (for example pts/0). pkill will then signal every process whose controlling terminal matches that name, effectively killing everything tied to that terminal session. This direct terminal-based targeting is more precise than filtering by user (which would kill all processes of that user on any terminal) or by searching the full command line (which can miss or misidentify processes). A variant using a killall form that pretends to target a terminal isn’t a reliable option on many systems, so it may not work as intended.