Linux

Security

Ubuntu Server Hardening

http://www.andrewault.net/2010/05/17/securing-an-ubuntu-server/
http://ubuntuforums.org/showthread.php?t=1002167

disable log

Run Spaceset +o history or Spaceshopt -uo history to disable history.

System Management

Install Kernel Headers

sudo apt-get install linux-headers-$(uname -r)

Remove all Kernel except the actual

sudo apt-get remove --purge $(dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d')

increase volume

pactl -- set-sink-volume 0 150%

Get active CPU scheduler

cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor

Lenovo Trackpoint Speed

create UDEV Rule - perm 755 root/root

SUBSYSTEM=="serio", DRIVERS=="psmouse", WAIT_FOR="/sys/devices/platform/i8042/serio1/serio2/sensitivity", ATTR{sensitivity}="220", ATTR{speed}="110"

execute command to immediate activate rules

sudo udevadm control --reload-rules
sudo udevadm trigger

Want to kill every process accessing /data/sales on a Linux operating systems? Try:

fuser -k -15 -m /data/sales
OR
fuser -k -9 -m /data/sales

config file view

Remove comments & blank lines from a config file:

egrep -v "^#|^$" file

for loop

for f in *.mp4; do ffmpeg -i $f -b:a 320K -vn $f.mp3; done

usefull links

https://help.ubuntu.com/community/PowerManagement/ReducedPower
ubuntu: PowerManagement/ReducedPower