Execute one of your last 5 history commands with one key

lastc.sh

#!/bin/bash
# run with: history -a && ./lastc.sh
clear
echo "Use \"history -a\" before to populate ~/.bash_history with your current history"
sleep 2

last5=$(cat ~/.bash_history |tail -n6 |head -n1 |xargs echo -n)
last4=$(cat ~/.bash_history |tail -n5 |head -n1 |xargs echo -n)
last3=$(cat ~/.bash_history |tail -n4 |head -n1 |xargs echo -n)
last2=$(cat ~/.bash_history |tail -n3 |head -n1 |xargs echo -n)
last1=$(cat ~/.bash_history |tail -n2 |head -n1 |xargs echo -n)

function printCommands {
  clear
  for num in 5 4 3 2 1; do
    varname="last$num"
    printf " $num - ${!varname}\n"
  done
  printf " 0 - Exit\n\n\n"
}

printCommands

while :
do
  read -t 1 -n 1 key
  if [[ "$key" -gt 0 && "$key" -lt 6 ]]; then
    printCommands
    varname="last$key"
    printf "${!varname}:\n\n"
    ${!varname}
  fi

  if [[ $key = 0 ]]; then
    printf "\n"
    exit
  fi

done