Knowing:

• pwd, ls, cd, cat/less, cp, mv, rm, rmdir, rm -rf, ls -lah
• command --help
• man command | grep thing I care about
• bonus points if you have tldr command installed

And since Arch is rolling release it’s python-lib, not python3-lib. :)

Problem is that distro1 has req-lib2.5.3 while distro2 has req-lib2.7.8, but your project was developed on distro3 with req-lib2.9.5 so you have to deal with every distro having different lib versions and compatibility issues that come with it, not just different packaging formats.