Fedora 22

Docs

Issues

Unwarranted bandwidth usage

PackageKit may go and download a bunch of stuff in the background. Disable it. 
    # systemctl stop packagekit
    # systemctl mask packagekit
DNF may periodically update the repo caches. Disable it. 
    # systemctl stop dnf-makecache
    # systemctl stop dnf-makecache.timer
    # systemctl mask dnf-makecache
    # systemctl mask dnf-makecache.timer

Can't strace your own processes

This is due to a yama block on the ptrace system call. Red Hat Bugzilla Disable it. 
    # echo 0 > /proc/sys/kernel/yama/ptrace_scope
and 
    # echo "kernel.yama.ptrace_scope = 0" > /etc/sysctl.d/10-ptrace.conf

apt/dpkg style interactive package installs

If you find you have been inflicted with apt/dpkg style package installs/updates... 
    # dnf remove python3-dnf-plugins-extras-rpmconf

Keep systemd's grubby hands off core dumps

systemd sets itself up to intercept core dumps, doing who knows what with them (except consume loads of cpu). Prevent this madness and set things back the way they were 
    # echo "kernel.core_pattern = core" > /etc/sysctl.d/50-coredump.conf

Prevent audit totally spamming dmesg

Just disable it by adding audit=0 to the kernel command line.

Get dmesg back under control

Add 
    alias dmesg='dmesg -t -k --color=never'
to your ~/.bashrc

-t No timestamps
-k No systemd spam etc
--color=never Just good old black and white

Missing fonts

Some fonts not showing up? Run 
    # fc-cache -f
to update the font cache.