Htop Process Actions, Signals, and Priority Changes

F7 or ]

# Lower the nice value of the selected process.

F8 or [

# Raise the nice value of the selected process.

F9 or k

# Open the kill menu for the selected or tagged processes.

kill -TERM 12345

# Classic shell companion flow.

sudo renice -n -5 -p 12345

# Companion command when you prefer non-interactive changes.

Space to tag, U to untag

# Mark multiple processes, then send one action to all of them.

s

# Attach strace to the selected process if installed.

l

# Inspect file descriptors for the selected process.

x

# Inspect active file locks for the selected process.

sudo strace -p 12345

# Use the PID from htop with a direct shell command.

sudo lsof -p 12345

# Use lsof directly from the shell.

taskset -pc 12345

# Complement htop when tracking placement or pinning.