Nano opens from the terminal, and the two rows of caret keys along its bottom are the only manual it ships with. The caret means Ctrl, the M- prefix means Alt, and the rest of what you need stays on screen while you type. I ran each keystroke here in nano 7.2, the build Ubuntu
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A Netplan file can be valid YAML, apply without an error, and still leave the machine unreachable. The generator reports only what it can parse, so a wrong interface name, a missing default route, or a resolver that never lands surfaces once the network is gone. I checked the generator against a config that still
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Rename a file so its name begins with a dot and the default directory listing stops showing it. Nothing else about the file changes. The dot is a naming convention that listing tools respect rather than a permission the kernel enforces, so one flag brings every hidden entry back into view. What makes a file
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A directory count changes with the definition behind it. Pipe ls into wc -l and a directory with nine visible files and two hidden ones reports thirteen, because plain ls does not print dot-prefixed entries. Every number quoted beside a command below comes from that tree. What You Need Before Piping Anything Every command here
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speedtest-cli is the terminal answer every Linux admin reaches for when a link feels slow. Speedtest.net has started rejecting the tool’s plain-HTTP calls with an HTTP 403, and the flag that fixes it is worth knowing before the next outage. Each command below shows a fresh install: a pip install into a venv for the
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I checked Ubuntu’s service ownership and the read-only interface, route, and resolver commands before writing this guide. You get the matching command for NetworkManager, systemd-networkd, Netplan, or one interface, followed by checks that show whether the route and DNS returned too. Why Ubuntu has more than one networking restart path Ubuntu 24.04.4 LTS, also called
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Raspberry Pi Foundation does not support upgrading Raspberry Pi OS in place, so the supported answer is a clean flash. That trade is wrong when the Pi you are holding has a year of configured services on it. Here is the Bookworm to Trixie path end to end: the archive keyring that has to be
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If you run ls -lh and wonder why every directory shows 4.0K, you are looking at the directory entry itself, not what lives inside the tree. du reads what is underneath. Why ls cannot sort directories by size ls reads directory metadata, so ls -S sorts regular files correctly while directories stay at their inode
How to easily list all directories and sort them by size on Linux Read More »
A port is only open when a process is listening on it. Here you will list every listening socket, see which process holds it, and check if it is reachable from outside. What “open port” actually means on Linux An open port is a port number with a process in LISTEN state on an IP
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You run ls, see old_project, and you want it to be new_project without touching the files inside. Linux has no standalone rename step for directories, so you reuse the move operation with a new name, which means a single mv call does the rename in place. How renaming works on Linux Renaming a directory does
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