I want to write a command line application on my Ubuntu machine but I encountered a problem when I was installing the dart sdk of dart 2 on linux mint 19.

After the installation I can't run the pub command from the terminal. I always get this error:

   Command 'pub' not found, did you mean:
command ‘puf’ from deb puf
command ‘pdb’ from deb python
command ‘publ’ from deb atfs
command ‘pua’ from deb pglistener
command ‘dub’ from deb dub
command ‘pcb’ from deb pcb-gtk
command ‘pcb’ from deb pcb-lesstif
command ‘pudb’ from deb python-pudb
Try: sudo apt install <deb name>

I already tried some path settings from the internet but none of them work or only temporarily.

How can I fix this?

As someone mentioned in a comment to an (outdated) answer, the nowadays (due to Dart being supplied / integrated with / in Flutter now) suggested correct use of pub is to be called via the flutter command:

`flutter pub`

ie. to use gRPC / protobufs v3 w/ Dart / Flutter:

`flutter pub global activate protoc_plugin`