Answer by Wasef Anwar for How to delete history of last 10 commands in shell?

for h in $(seq $(history | tail -1 | awk '{print $1-N}')  $(history | tail -1 | awk '{print $1}') | tac); do history -d $h; done; history -d $(history | tail -1 | awk '{print $1}')

If you want to delete 10 lines then just change the value of N to 10.