Usually when I find a command I want to alias, I echo it to my .bashrc like so:
[up button pressed to last command, then line edited so that it reads]
$echo "command-i-just-did" >> ~/.bashrc
There may be a better way to do this. But anyway, just now I overwrote the entire .rc file by using a single chevron. However, since the .bashrc is still current, it's still accepting my old aliases (for now of course). So is there a way to recover it?
alias without parameter outputs the definitions of currently defined aliases.declare -f outputs the definitions of currently defined functions.export -p outputs the definitions of currently defined variables.All those commands output definitions ready to be reused, you can redirect their outputs directly to a new ~/.bashrc.
All lists will contain a lot of elements defined elsewhere, for example /etc/profile and /etc/bash_completion. So you will have to clean up the list manually.
.bashrc for your system. In Debian it is in /etc/skel, or you can create a new user, if you can, to get a brand new .bashrc.
set and declare (without arguments) display all of this at once.
Commented
Nov 15, 2011 at 12:19
declare -f >> ~/.bashrc could perhaps add A LOT of lines to your .bashrc. In my case that was 13216 lines because of git, npm and rvm combined.
typeset -f > .bashrc
should do it, providing all you had were aliases.
functions command doesn't exist for me on 4.2.10(2)-release. You probably mean declare -f.
Commented
Nov 14, 2011 at 14:30
echo "set -o noclobber" > ~/.bashrc(remember to add a second angle bracket).bashrchad any logic in it that depended on local variables like host, user, etc. that is probably unrecoverable. The real answer is to restore from your most recent backup. You do have a recent backup right?