All About Linux.

Before checking filesystem free space, you may first want to know how much space a particular directory uses. The du command estimates the space used by that directory and its contents. I’ll explain what du measures and show how to request a total or inspect another directory level. TL;DR Use the readable-units option with a

At a Linux terminal, the right password command depends on whose account needs a change. passwd updates the password for your account or for another account when you name it. I’ll explain which passwd command to use for your own account or another user’s, and how to handle password-change errors and related tasks. TL;DR: Change

After a command is installed, its name may be clear while the executable’s location is not. The which command searches directories in PATH, the list of places used to find commands, and prints the path of a matching executable. You’ll learn how to look up a command and what to check when which prints no

An unfamiliar directory can contain several layers of folders, making its contents harder to scan. The tree command displays those folders and their files in a branching hierarchy. This article covers installing tree and tailoring its output with depth limits and name filters. TL;DR The tree command prints a directory and its contents as an

When Linux storage is running low, locating large files gives you paths to inspect. The find command searches a chosen directory for files above a size threshold. This article shows how to set that threshold and rank matching files by apparent size. It also explains when du helps compare directory usage. TL;DR: Find large files

Fetching a URL from a Linux shell can leave you deciding whether the response should go into a file or appear in the terminal. Wget and curl are command-line tools for transferring data to and from URLs, and they handle output differently by default. This article compares which command fits common transfer tasks and shows