Ofey Chan, aka 'ofey404'

How to recover your bashrc

If you deleted your bashrc by accident, don’t close current shell! Many valuable configurations can be extracted from it.

Or maybe you make these mistakes:

• While adding new environment variable with <<, mistyping it as <.
• Reversing source and destination while copying…

If you work under a version control system, you are lucky cause everything can be recovered. Or this post may help.

Environment variables

env
# SHELL=/bin/bash
# SESSION_MANAGER=local/unix:@/tmp/.ICE-unix/2668,unix/unix:/tmp/.ICE-unix/2668
# ...

Function definition

declare -F
# declare -f j
# declare -f jc
# declare -f unproxy
# ...

Executing this will print commands to show every bash function in current environment.

Aliases

alias
# ...
# alias tr='todo remove'
# alias typora='/opt/typora/Typora'
# alias vim='nvim'
# alias which='(alias; declare -f) | /usr/bin/which --tty-only --read-alias --read-functions --show-tilde --show-dot'
# alias xzegrep='xzegrep --color=auto'
# alias xzfgrep='xzfgrep --color=auto'
# alias xzgrep='xzgrep --color=auto'
# ...

The template bashrc of system

cat /etc/skel/.bashrc 

Things lost forever

All source ... , for bash won’t remember which file has been sourced. It just change the environment according the file.

The logic in bashrc is lost, eg: When login with ssh, set $EDITOR to vim.

After all, good luck!

Reference

• https://askubuntu.com/questions/404424/how-do-i-restore-bashrc-to-its-default

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* Style sheet refers to Dr. Brian Robert Callahan