$ sudo apt-get update
$ sudo apt-get install cl-std-srvs 

cl-std-srvs is installed in your system.

Make ensure the cl-std-srvs package were installed using the commands given below,

$ sudo dpkg-query -l | grep cl-std-srvs *

You will get with cl-std-srvs package name, version, architecture and description in a table

cl-std-srvs package basic information: