Archlinux's package manager.
You may also be insterested in arch ABS.
Documentation
Locations
/etc/pacman.conf |
configure which repos to pull from (core, extra, communnity, multilib)
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/etc/pacman.d/mirrorlist |
configure which sources to pull from (waterloo, queensu etc)
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/var/cache/pacman/pkg |
currently installed programs. Can use these archives to rollback to older versions of program.
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/var/log/pacman.log |
history of pacman operations
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/var/lib/pacman/db.lck |
pacman lockfile
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Notes
Pacman Tools
Local Caching