Core UNIX Commands

The table below is 80 % of what you’ll type each day. Flags shown are the safe defaults we review in PRs.

Command	Cheat‑description	Example
`pwd`	prints full path of current directory	`pwd`
`env`	dumps environment variables (useful for debugging config)	`env \| grep DATABASE`
`cd`	change directory (`cd ‑` jumps back)	`cd ~/projects`
`ls ‑la`	list files, humans size, dotfiles visible, colorized by default	`ls -la ~/Downloads`
`mkdir ‑p`	make directory, parents if needed	`mkdir -p tmp/cache`
`cp ‑a`	copy file/dir, preserve perms (`-r` not needed with `‑a`)	`cp -a src build/`
`mv`	move or rename file/dir	`mv foo.txt bar.txt`
`rm ‑rf`	delete recursively, no prompts; triple‑check path first!	`rm -rf build/`
`cat`	dump file to stdout (pipe into `less -R` for paging)	`cat README.md`
`grep ‑r`	search recursively for string in files	`grep -r 'foo' src/`
`ssh -v user@host`	secure shell; `-v` prints handshake debug	`ssh -v dev@10.0.0.5`
`sqlx migrate add <migration-name>`	create a new migration file with the given name.	`sqlx migrate add init-user`
`cargo check`	check the code for errors without building it.	`cargo check`
`cargo fmt`	format the code according to the Rust style guide.	`cargo fmt`
`cargo clippy`	lint the code to find potential issues.	`cargo clippy`
`cargo build`	build the code.	`cargo build`
`cargo run`	run the code.	`cargo run`
`cargo test`	run the tests.	`cargo test`
`cargo run -p <package>`	run a specific package.	`cargo run -p api`
`cargo add <package>`	add a new package to the project.	`cargo add tokio -F full`

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