Using Let command in shell script error command not found solved,Linux Teacher Sourav,Kolkata 09748184075

If anyone is trying to learn shell script in ubuntu (in my case ubuntu 16.04), he or she might found out that bash built in commands such as let giving you command not found error ,to solve this you need to understand even if you put the line #!/bin/sh at the top of your script /bin/sh on ubuntu is dash not bash

So to solve this you need to reconfigure dash to not be the default shell

The command to accomplish this is

sudo dpkg-reconfigure dash

press no when asked for whether you like dash to be the default

and then everything should work fine

Source:https://ubuntuforums.org/showthread.php?t=1377218