Commands by The_IceMan

Commands by The_IceMan_Blog (2)

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Remove all older kernels then the current running kernel for Ubuntu/Debian base system
This is sample output - yours may be different.
0

export KEEP_KERNEL=2; dpkg -l 'linux-image*' | awk '/^ii/ { print $2 }' | grep "[0-9]" | awk 'BEGIN{i=1}{print i++, $0}' | grep `uname -r` -B99 | sort -r | tail -n+$(($KEEP_KERNEL+2)) | awk '{print $2}'| xargs apt-get -y purge

The_IceMan_Blog · 2013-11-23 15:35:42 7
Check if you partition are aligned

To get most of you HDD/SSD driver you need to make sure you partition are aligned, if not the speed penalty can be up to 50% slower! this simple one liner will check to see if each partition start sector is divided by 512 you need to change sda with your driver if you find the one of your partitions is not aligned use gparted to move the start sector of the partition to be divided of 512 Show Sample Output
This is sample output - yours may be different.
```
/dev/sda1  4.000000        Good
/dev/sda2  404.000000      Good
/dev/sda3  160404.000000   Good
/dev/sda4  1520004.000000  Good
/dev/sda5  1520008.000000  Good
/dev/sda6  1521988.000000  Good
/dev/sda7  1643216.000000  Good
/dev/sda8  1659220.000000  Good
/dev/sda9  1787472.000000  Good
```
1

fdisk -l /dev/sda | grep -E sda[0-9]+ | sed s/*// | awk '{printf ("%s %f ",$1,$2/512); if($2%512){ print "BAD" }else {print "Good"} }' | column -t

The_IceMan_Blog · 2012-05-18 08:34:36 5

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