macOS

Homebrew

Task	Command
Update package index	`brew update`
Upgrade all installed packages	`brew upgrade`
Upgrade a specific package	`brew upgrade <package>`
Remove old versions of packages	`brew cleanup`
Check for problems	`brew doctor`
List installed packages	`brew list`
List outdated packages	`brew outdated`
List top-level installs (no dependents)	`brew leaves`
Show what depends on a package	`brew uses --installed <pkg>`
Uninstall a package	`brew uninstall <package>`

Brewfile

Use a Brewfile to declaratively manage your installed packages, useful for bootstrapping a new machine.

# Dump currently installed packages to a Brewfile
brew bundle dump --file=~/Brewfile

# Install everything in a Brewfile
brew bundle install --file=~/Brewfile

Example Brewfile:

brew "git"
brew "fnm"
brew "direnv"
cask "cursor"
cask "rectangle"

Networking

Ports & Processes

Find what is listening on a port:

lsof -i :3000

Kill whatever is on a port:

kill -9 $(lsof -ti :3000)