39th Week of 2021

Computer Science⚑

GNULinux⚑

cURL⚑

• New: Fetch a website that requires auth.

  curl -u username:password [url]
  

Docker⚑

• New: Remove unused data.

  Use docker system prune.

  And for automated clean up:

  Add the following line to crontab -e:

  0 3 * * * /usr/bin/docker system prune -f 2>&1 > /dev/null
  

  -f prevents manual confirmation from being asked.

Git⚑

• New: Pre-commit.

  pre-commit/pre-commit is a framework for managing and maintaining multi-language pre-commit hooks.

  You can skip specific hooks with:

  SKIP=no-commit-to-branch pre-commit run --all-files
  

  Which is useful if a CI runs for the main branch so that it doesn't complain about running in it.

netcat⚑

• New: Test TCP connections.

  nc -v -z -w 3 [host] [port]
  

  Options: * -v: verbose * -z: just check if the port is open and exit (without sending any data) * -w 3: 3 seconds timeout

  If it exists with return code 0, it means that the connection succeeded.

wget⚑

• New: Redirect output to stdout.

  wget -qO- [url]
  

Programming⚑

pip⚑

• New: Pip-tools.

  jazzband/pip-tools are a set of tools to keep your pinned Python dependencies fresh.

  Usage of pip-compile and of pip-sync.