Links tagged “unix”

refp.se

A shell colon does nothing. Use it anyway - the colon as no-op, placeholder and guard. Short, immediately usable.

mareksuppa.com

HTTP requests without curl, using Bash /dev/TCP: the kind of TIL that makes you reread your own shell. A request with nothing but Bash.

github.com

modernish: a library for shell script programming

remysharp.com

Rundown of modern replacements for classic Unix tools — bat for cat, fd for find, plus fzf, htop, ncdu, jq and tldr.

github.com

Minimal init for containers, spawning a single child, forwarding signals to it and reaping zombie processes, with no change needed to the image.

make.mad-scientist.net

How to build one GNU Make source tree for several target architectures at once, comparing source copies, explicit paths, VPATH and a self-reinvoking VPATH method.

0pointer.de

Explains systemd socket activation and how a daemon accepts listening sockets pre-created by the init system, allowing services to start in parallel.

0pointer.de

Second part of the series, walking through adding socket activation and other on-demand activation modes to the CUPS printing server.

0pointer.de

Third part of the series, covering how programs submit log messages to the systemd journal, from syslog() and stdout to the native structured logging API.

seclists.org

Tavis Ormandy's Full Disclosure post on CVE-2010-3847: glibc's dynamic linker expands $ORIGIN in LD_AUDIT for setuid binaries, which a hardlink trick turns into local root.

code.google.com

Original home of xpra, screen for X — detach a running X application from one display and reattach it elsewhere; the code now lives in the archived partiwm repository.

lugatgt.org

Slide deck on GNU Screen: the basics, screenrc configuration and keybindings, split windows, logging, password protection and multi-user shared sessions.

pixelbeat.org

Cheat sheet of GNU screen keyboard shortcuts and command-line options — windows, splitting, detaching, copy mode and scrollback.

linuxjournal.com

Walkthrough of building a self-extracting installer by appending a tar.gz payload to a shell script that strips itself, decompresses the archive and runs the install step.

linuxgazette.net

Linux Gazette introduction to Vim for readers who already know the basics, collecting mnemonics and the slightly more advanced commands that speed up everyday editing.

linuxgazette.net

A walkthrough of building a Linux process that even root cannot stop, using a loop-mounted ISO, an inittab respawn entry and a patched init.

enseirb.ll.free.fr

Fiche pratique sur l'accès SSH aux serveurs de l'ENSEIRB : connexion, redirection X, compression, copie de fichiers avec scp et sftp.