/ linux / commands

Print the current working directory.

List all files (including hidden) with permissions, owners and timestamps.

Change to the specified directory.

Create a new directory called *new_folder*.

Recursively delete *old* and everything under it (use with caution!).

Copy a directory tree from *src* to *dest*.

Move (or rename) *file.txt* into your *Documents* folder.

Display the contents of a text file – here the system’s user database.

Search case‑insensitively for the word *error* in the system log.

Set executable permissions (rwxr‑xr‑x) on *script.sh*.

Change ownership of *file.txt* to the current user and group.

Show disk usage of all mounted filesystems in human‑readable units.

Show the total size of each item in the current directory.

Interactive view of running processes and resource usage.

List all processes and filter for those containing *node*.

Force‑kill the process with PID 1234.

Create a gzipped archive of your home directory.

Open an encrypted remote shell to *host* as *user*.

Securely copy *file.txt* to the remote host’s */tmp* directory.

Show the status of the *nginx* service (systemd).

Follow the live log of the *nginx* service.

Clone a remote Git repository into the current folder.

Install Node dependencies and start the dev server (common for Next.js).

Spin up your Docker‑Compose stack in detached mode.

A richer, colour‑coded version of *top* (install with `sudo apt install htop`).

Fetch only the HTTP headers of a URL – handy for checking redirects.