Get the number of threads for a running process in Linux

1. Get process PID:

   ps uax|grep {{ process_name }}

2. Get number of threads:

   cat /proc/{{ process_PID }}/status | grep Threads

Example for htop process:

$ cat /proc/$(ps aux | grep -E "htop\$" | grep -v grep | awk '{print $2}')/status | grep Threads
Threads:	1