Bash (shell, not scripting)

Created: 2016-03-01 16:18:51 -0800 Modified: 2020-10-29 11:15:31 -0700

Basics

”.” is an alias for “source”, so if you ever see something like ”. venv/bin/activate”, it’s sourcing the “activate” file. Also note: “venv” is a virtual environment for Python that is just going to set the environment for your current shell/project.

[12:40] c17r: it’s because python packages are, by default, stored at the machine/user level, not the project level

“bash —login” or “bash -l” (lowercase L) - starts a bash shell by invoking the various profiles you may have (e.g. /etc/profile, ~/.bash_profile). This is useful when you don’t want to “source” all of those profiles manually.
“type” is a shell built-in that will tell you if something is an alias.
- type Cd
  - Cd is aliased to `cd’
You can clear your command history with “history -c” (you can view it with just “history”)
- Note that if you type a space before commands, they won’t go into your history.
If you find yourself pressing the up arrow to get the last command and then changing the beginning of the command, then you may want to use “!$”, which represents the last argument of the previous command (reference). For example:
- Old
  - $ git diff t
  - Press up, delete “diff”, change to “add”
  - $ git add t
- You can instead do this:
  - $ git diff t
  - $git add !$

You’re probably using ”~” in your PATH, so “which NAME_OF_BINARY” doesn’t list it. You can use “$HOME” instead.