https://www.gnu.org/software/grep/manual/grep.html
nihilism is exhausting
https://www.gnu.org/software/grep/manual/grep.html
https://www.gnu.org/software/gawk/manual/gawk.html
htthttps://www.gnu.org/software/sed/manual/sed.html
https://regex101.com
https://fasterthanli.me/articles/a-half-hour-to-learn-rust
"You're entering a world of pain."