Bash Tweaks

.bashrc

# don't put duplicate lines or lines starting with space in the history
HISTCONTROL=ignoreboth:erasedups

# append to the history file, don't overwrite it
shopt -s histappend

# don't execute expanded result immediately
shopt -s histverify

# https://unix.stackexchange.com/a/18443
PROMPT_COMMAND="history -n; history -w; history -c; history -r; $PROMPT_COMMAND"

if [ -z "$TMUX" ]; then
  if [[ $- =~ i ]] && shopt -q login_shell; then
    #[[ $(ps -p $PPID -o comm=) =~ sshd ]] && \
    tmux attach || tmux new
  fi
fi