Use rozcietrzewiacz's bash history solution

http://unix.stackexchange.com/a/18443/9365

dotfiles/bash/main.bashrc

 ### BASH ###
 ### '''' ###
 
-HISTCONTROL=erasedups
+HISTCONTROL=ignoredups:erasedups
+shopt -s histappend
+PROMPT_COMMAND="history -n; history -w; history -c; history -r; $PROMPT_COMMAND"
+
 HISTIGNORE="$HISTIGNORE:ls:ll:la:cd"
 HISTIGNORE="$HISTIGNORE:git dc:git st"
 #export HISTIGNORE="$HISTIGNORE:se *:sc *"