bash

Getting the most out of the venerable default shell

The following will create an eternal history for bash as well as preserving history from multiple terminal tabs and is drawn from the following Stack Overflow questions:
- [https://stackoverflow.com/questions/9457233/unlimited-bash-history]
- [https://unix.stackexchange.com/questions/1288/preserve-bash-history-in-multiple-terminal-windows/]
```
export HISTFILESIZE=
export HISTSIZE=
export HISTTIMEFORMAT="[%F %T] "
export HISTFILE=~/.bash_eternal_history
PROMPT_COMMAND="history -a; history -c; history -r; $PROMPT_COMMAND"
```
I have often found that when I searched backwards in history but hit the wrong key (something I do frequently) I had to hold down the down arrow for a long time to start over looking for that command again. I looked into this and it's not actually not necessary. M-> will take the user to the very end of history without any tedium.