Question

I try to copy a command from history. How can I copy the 510th command? Please, see the data below. My bet is:

history | grep 510 | sed '1q;d' | awk '{print $2-$10}' | pbcopy 

but the output is 0. I cannot understand the reason. What is wrong in the command?

  505  find . -perm=750 -print0 | xargs -0 chmod 750   506  find . --perm=750 -print0 | xargs -0 chmod 750   507  find . -perm=750 -print0 | xargs -0 chmod 750   508  find . -perm=750 -print0 | xargs -0 chmod 750   510  find . -perm 750 -print0 | xargs -0 chmod 750   512  history | grep perm 750 -print0 | pbcopy 

Answer 1

If you’re using bash:

echo '!510' | pbcopy 

(See also ‘history expansion’ in the bash manual)