Ask HN: What are the Linux Tools/Scripts you don't want to live without anymore?

`up`, a small Bash function I once wrote. It allows you to walk up the directory tree by passing it a path or the number of levels you would like to walk up.

Has served me well in Java in projects with deep directory trees (due to deep package hierarchies).

https://github.com/helpermethod/up

Picked up very recently: https://github.com/peco/peco

Git alias for keeping branches up-to-date: https://gist.github.com/ricardobeat/9600953

Although not specifically Linux:

screen, ack, ssh-agent, git.

i have an alias for pwd | pbcopy which basically copies my current directory into clipboard.