Local checks

Local checks involve examining the state of the computer Specsheet is running on.

• apt — Apt packages
• defaults — the Apple settings database
• fs — the filesystem
• gem — the RubyGems database
• group — the groups database
• hash — file hashes
• homebrew — Homebrew packages, taps, and casks
• npm — NPM packages
• systemd — systemd units and services
• ufw — Uncomplicated Firewall rules
• user — the users database