Linux

## Change ssh keysssh-keygen -t rsa -b 4096 echo “Regenerating SSH Host keys…” rm -rfv /etc/ssh/*key* /sbin/service sshd restart

First remove existing ImageMagick library: yum -y remove ImageMagick* && cd /root && rm -f ImageMagick.tar.gz Download and install the latest stable version: yum -y

find -L ./ -iname ‘*die*’

# send direct postqueue -f # requeue postsuper -r ALL

find <dir> -maxdepth 1 -type d -name ‘*foo*’ -print -quit

# if you have EPEL in your yum repo: yum -y install systester-cli # else install from source: yum -y groupinstall ‘Development Tools’ yum -y

sudo yum install alacarte press super key and type alacarte. Choose icon Main Menu Press New Item Name: KeePass Command: mono /home/bvbmedia/keepass/KeePass.exe Comment: KeePass rules! Press

# stop iptables /etc/init.d/iptables stop # remove all rules iptables -F iptables -X iptables -t nat -F iptables -t nat -X iptables -t mangle -F

Maximize throughput for rebuilding software RAID: One-time If you want to maximize performance for one time (till reboot) then run: echo 99999999 > /proc/sys/dev/raid/speed_limit_min echo

Boot new machine with CENTOS LiveCD. Creating swap, boot and root partition fdisk /dev/sda # create swap n p 1 enter +16G # create boot