FYI one can avoid duping a command to echo it out as in some of the examples by using set -x (set -o xtrace). It can be disabled with set +x afterwards, or you

FYI one can avoid duping a command to echo it out as in some of the examples by using set -x (set -o xtrace). It can be disabled with set +x afterwards, or you can run it and your desired command in a subshell if performance is not a priority. ( set -x ssh ... )