Monitor the result of some command by looping it an infinite while loop. To quit, press Ctrl+C. Thanks to Sreenath for this tip.

while [ 1 ]; do ls -l; sleep 2; done

Perform an md5sum on a device, like a CD

dd if=/dev/hdc | md5sum

You can use this command to convert a Bin/Cue image to an ISO image in a linux system. You may not have the bchunk command - so use yum or apt to install it before converting the image.

bchunk IMAGE.bin IMAGE.cue IMAGE.iso

Original Article

Configure ‘eth0′ in promiscuous mode to gather packets (sniffing)

ifconfig eth0 promisc

Remove a deb package from the system

dpkg -r package_name

Verify the integrity of a rpm package

rpm --checksig package.rpm

Burn an ISO image

cdrecord -v dev=/dev/cdrom cd.iso

Build a rpm package from a rpm source

rpmbuild --rebuild package_name.src.rpm

Command to download a series of urls with zero padding files…

for ((i=1;i<20;i++))
do wget "http://img55.onemanga.com/mangas/00000004/00000000/Naruto-Pilot-`printf "%02d" $i`.jpg"; done
done

Displays linux tasks in a hierarchical mode

ps -e -o pid,args --forest