Revision as of 18:44, 29 September 2019

Quirks

Now that dbus is no longer compiled with X11 support (Q4 2018) you have to call X11 apps like this:

sudo dbus-launch --exit-with-session nemo

Time

NTPd has been supplanted by Chrony and should not be used to serve time to clients.
If all that is required is a basic time client systemd's timesyncd should be used as it is the most lightweight.

systemd-timesyncd

• The default NTP settings are compiled in by the vendor and can be overriden via /etc/systemd/timesyncd.conf
• The most common commands are `timedatectl show-timesync` and `timedatectl set-ntp`

chrony

Packaging

• Recursively remove the package without saving any backups and also remove unneeded dependencies `pacman -Rnsu noto-fonts`

• Recursively removing orphans and their configuration files:

pacman -Rns $(pacman -Qtdq)

If no orphans were found pacman outputs error: no targets specified. This is expected as no arguments were passed to pacman -Rns.

Note: The arguments -Qt list only true orphans. To include packages which are optionally required by another package, pass the -t flag twice (i.e., -Qtt).

Updating Mirrors

reflector -c US --fastest 5 --age 48 --protocol http --sort rate --verbose --save /etc/pacman.d/mirrorlist

Pacman Entropy

pacman-key --init

cat /dev/sda > /dev/null

• After about 1 minute the kernel will have enough "true" entropy to finish the command.

pacman-key --populate archlinux

AUR

• You can automatically scan for updates to your aur installed packages with 'yay -a -Syu'

• Dealing with a Perl update

1. When Perl gets updated you have to run this command for the previous perl version to get a list of all of the old modules: pacman -Qqo '/usr/lib/perl5/5.30'
2. Then rebuild all of those modules: yay -a -S $Results_List

• Turn off compression for makepkg - edit /etc/makepkg.conf and remove the xz from the end of PKGEXT