npm package getting installed but not working

Question

when I am using command npm install -g lerna it gets executed with no error but after that using command lerna --version gives output "lerna:command not found".

Possible solution
maybe if somehow I manage it to install in usr/local/lib/node_modules it should work cause other npm packages installed here are working fine but its getting installed in /home/surajkulriya/.npm-global/lib/node_modules.

OS: ubuntu 18.04

which npm:/usr/local/bin/npm
which node:/usr/local/bin/node
which nodejs:/usr/bin/nodejs

Answer 1

Finally after too much effort I sorted out the issue. I removed node nodejs and npm completely and reinstalled them again and used command

npm i -g npm

to fix the broken dependecies.I reinstalled lerna and it worked.