nsupdate to manually update DNS record

Chrome ask for Keyring

To disable,

Passwords and Keys -> Change Password -> changed it to empty

Wifi Driver for HP Elitebook 8470p

Device BCM43228, needs to install kmod-wl from rpmfussion.

HP 6730B Fan Issue Resuming from suspend

https://www.michelebologna.net/2015/hp-6730b-and-fan-at-full-speed-after-suspend-fedora-ubuntu-opensuse/ Does not work for Centos 7, use the following instead

[root@ ~]# cat /usr/lib/systemd/system-sleep/99fancontrol.sh 
#!/bin/bash
echo $1 > /tmp/x
case "$1" in
hibernate|suspend|hybrid-sleep)
# Stopping is not required.
;;
post)
# In background.
ls /sys/devices/virtual/thermal/cooling_device*/cur_state | while read A; do echo 1 > $A; echo 0 > $A; done
;;
*) exit $NA
;;
esac

systemctl status systemd-suspend.service and man systemd-suspend.service

KVM Guest Safe during Host Reboot

Use libvirt-guest.services and configuration is in /etc/sysconfig/libvirt-guests

Team and Bond Interface with WIFI in Fedora 25

Team interface won't work without Network Manager, and Network Manager doesn't accept WIFI as a team device. Similarly Network Manager does not accept WIFI as a bond device, but bond interface however will work without Network Manager. So WIFI works with NM_CONTROLLED=no and will have to restart network after boot to get it to work.

erase disk

badblocks -vs -p 2 -b 512 -t random -o badblocks.txt -w /dev/sdi

-p is number of passes, the more the better.

dd if=/dev/urandom of=/dev/sdi bs=512 conv=notrunc