Enough Command Line

$  DATABASE_PASSWORD=xxxxxxxx psql ...

Adding a space before the command prevent secrets being stored in the shell history. See $HISTCONTROL.

split --bytes 100M --numeric-suffixes --suffix-length=3 large.csv large-

scp '' ./

ls -at | head -10

du -h file

macOS only because of say:

for i in {1..100}; rspec spec/flaky_spec.rb || { say 'test failed please take a look' }

du -sh ./*

file image.png

grep -v "pattern"

ls -1 | wc -l