For 2, see chronic[0] (part of moreutils[1]). It runs a command, muting stdout and stderr unless the command exits with a non-zero status. [0]: https://manpage

For 2, see chronic[0] (part of moreutils[1]). It runs a command, muting stdout and stderr unless the command exits with a non-zero status. [0]: https://manpages.debian.org/jessie/moreutils/chronic.1.en.html https://manpages.debian.org/jessie/moreutils/chronic.1.en.ht... [1]: https://joeyh.name/code/moreutils/ https://joeyh.name/code/moreutils/