$ diff -u /tmp/a /tmp/b --- /tmp/a 2015-03-24 08:33:00.021919797 -0400 +++ /tmp/b 2015-03-24 08:33:05.629963015 -0400 @@ -1,5 +1,5 @@ #!/usr/bin/env bash set -e i=0 -let i++ +let i++ || true echo "i is $i" $ /tmp/a $ /tmp/b i is 1 $