Writing any script would be hell if the commands you call suddenly start modifying their behaviour. This is bad practice, and the GNU coding standards (for exam

Writing any script would be hell if the commands you call suddenly start modifying their behaviour. This is bad practice, and the GNU coding standards (for example) agree: https://www.gnu.org/prep/standards/standards.html#User-Interfaces https://www.gnu.org/prep/standards/standards.html#User-Inter... "Likewise, please don’t make the behavior of a command-line program depend on the type of output device it gets as standard output or standard input."