Commands

ISO building

Command	Where	What it does
sudo ./build.sh	profile repo root	Installs build deps, then builds the ISO (root required)
sudo mkarchiso -v iso/	profile repo root	Builds the ISO directly, skipping dep installation
7z -v500m a out/*.iso.zip out/*.iso	after build	Splits the ISO into 500 MB volumes for release upload
md5sum * > md5sums.txt	out/	Produces the published checksum file

Packages

Command	What it does
makepkg -s	Build a package, installing missing dependencies
makepkg -si	Build and install the result
makepkg -sc --check	Build in turn, run the check() suite
updpkgsums	Regenerate sha256sums from the actual sources
makepkg --printsrcinfo	Generate .SRCINFO to stdout
namcap PKGBUILD	Lint a PKGBUILD
pkgctl build	Build in a clean chroot
pkgctl repo clone <pkg>	Fetch upstream Arch PKGBUILDs (replaces the removed asp)
repo-add <db.tar.gz> <pkgs...>	Create/update a local repo database
pacman -U ./pkg.pkg.tar.zst	Install a built package file

Repositories and system

Command	What it does
pacman -Sl world	List packages in the world repository
pacman -Syu	Full sync + upgrade (never -Sy alone)
pacman -Ql <pkg>	List files owned by an installed package
pacman -Qo <file>	Which package owns a file
pacman -Fy && pacman -Fl <pkg>	Search file lists in sync databases
pactree -r <pkg>	Reverse dependency tree
systemctl --failed	Failed units after a boot problem
journalctl -b -p err	This boot's errors

App development

Command	What it does
GDK_DEBUG=all GTK_DEBUG=interactive <app>	Run a GTK app with the inspector
QT_LOGGING_RULES="qt.waylandclient.debug=true" <app>	Qt Wayland logging
coredumpctl gdb <pid>	Debug a crash from the journal
gdk-pixbuf-query-loaders --update-cache	Refresh icon/pixbuf caches (hook territory)
update-desktop-database	Refresh desktop entry database (hook territory)
desktop-file-validate <file>	Validate a desktop entry

Release workflow

Step	Command
Tag a release	git tag -a v2026.11 -m "..." && git push origin v2026.11
Create the release	GitHub UI or gh release create (this triggers CI)
Test channel check	mirror.parchlinux.com/test/ after a pre-release

Full context: release automation.