CONFIGURATION EXPLANATION
=========================
`hh` works best with the optional configuration described in this section. 
You can configure `hh` just by running:
```bash
hh --show-configuration >> ~/.bashrc
```

CONFIGURATION OPTIONS
---------------------
Bind `hh` to a BASH key e.g. to `Ctrl-r`:
```bash
bind '"\C-r": "\C-ahh \C-j"'
```
or `Ctrl-Alt-r`:
```bash
bind '"\e\C-r":"\C-ahh \C-j"'
```
or `Ctrl-F12`:
```bash
bind '"\e[24;5~":"\C-ahh \C-j"'
```
bind `hh` to `Ctrl-r` only if this is interactive shell:
```bash
if [[ $- =~ .*i.* ]]; then bind '"\C-r": "\C-a hh \C-j"'; fi
```

To determine the character sequence emitted by a pressed key in terminal, 
type `Ctrl-v` and then press the key. Check your current bindings using:
```bash
bind -S
```

Get `hh` in more colors:
```bash
export HH_CONFIG=hicolor
```
show normal history by default (instead of metrics-based view):
```bash
export HH_CONFIG=rawhistory
```
show favorites by default (instead of metrics-based view):
```bash
export HH_CONFIG=favorites
```
make search case sensitive (insensitive by default):
```bash
export HH_CONFIG=casesensitive
```
show warnings:
```bash
export HH_CONFIG=warning
```
show debug messages:
```bash
export HH_CONFIG=debug
```
more colors and case sensitive search:
```bash
export HH_CONFIG=hicolor,casesensitive
```

Increase the size of history:
```bash
export HISTFILESIZE=10000
export HISTSIZE=${HISTFILESIZE}
```
Variables defined above increase the number of history items and history file size
(default value is 500).

Ensure syncing (flushing and reloading) of `.bash_history` with in-memory 
  history:
```bash
export PROMPT_COMMAND="history -a; history -n; ${PROMPT_COMMAND}"
```

Force appending of in-memory history to `.bash_history` 
  (instead of overwriting): 
```bash
shopt -s histappend
```

Use leading space to hide commands from history:
```bash
export HISTCONTROL=ignorespace
```
Suitable for a sensitive information like passwords.