How to find PID of the current working shell in linux ?

Using Following methods u can get the  PID of shell in linux.

Method 1:

echo $$

Example:

dev@linuxforfreshers.com:~$ echo $$

29215

Where $$  is the PID of the current shell.

Method 2:

dev@linuxforfreshers.com:~$ ps -p $$

  PID TTY          TIME CMD

29215 pts/40   00:00:00 bash

Or

dev@linuxforfreshers.com:~$ ps -p $$ | awk '{ print $1 }'

PID

29215

Method 3:

It will give all the shell’s PID numbers.

Example:

dev@linuxforfreshers.com:~$ sudo pidof /bin/bash

31396 29248 29215 27940 15796 15764

Method 4:

Using BASHPID

Example:

dev@linuxforfreshers.com:~$ echo $BASHPID

29215