How to delete history of last 10 commands in shell?

Question

Commands follows

  511  clear
  512  history
  513  history -d 505
  514  history
  515  history -d 507 510 513
  516  history
  517  history -d 509
  518  hist         


        

Answer 1

I use this script to delete last 10 commands in history:

pos=$HISTCMD; start=$(( $pos-11 )); end=$(( $pos-1 )); for i in $(eval echo "{${start}..${end}}"); do history -d $start; done

It uses $HISTCMD environment var to get the history index and uses that to delete last 10 entries in history.