$ echo "What a time to be alive" | sed s/a/an awful/ sed: -e expression #1, char 6: unterminated `s' command Whan awfult a time, indeed. :( Shoulda ran fred

$ echo "What a time to be alive" | sed s/a/an awful/ sed: -e expression #1, char 6: unterminated `s' command Whan awfult a time, indeed. :( Shoulda ran fred instead of sed.