How To Backup BootSector/MBR for Windows Boot

Backup the BootSector/MBR

Some guides show only taking the first 512 bytes (MBR), others show the
first 63 blocks (MBR + Bootloader).

# dd if=/dev/sda of=/mnt/storage/sda.mbr bs=512 count=1
# dd if=/dev/sda of=/mnt/storage/sda.vbr bs=512 count=63

how to delete samba session on windows

control keymgr.dll

พอลบ user แล้วก็ใช้คำสั่ง net use ดูว่าเราค้างอยู่ในแชร์ไหนของ samba ก็ delete ออก
อย่างเมื่องเช้าค้างอยู่ใน folder share ก็ใช้ net use \\samba\share /delete

how to permanently set max_user_watches of inotify in debian

add the following lines:

> fs.inotify.max_user_watches=200000

into this file: /etc/sysctl.d/local.conf

how to get serial number of harddisk on dell server

Dell server uses PERC controller so...

smartctl -a -d megaraid,$a /dev/sda

$a is 0, 1, 2 and 3 for disk #0, #1, #2 and #3, expectively

rsync

useful rsync command line

rsync -avz --delete --append src/ dst

how to fake dns for specific domain names

http://unix.stackexchange.com/questions/64906/fake-dns-for-a-single-host

irc server - how to set up

http://www.lowendguide.com/3/irc/charybdis-complete-irc-daemon/