When ssh to remote server tcpdump command floods the screen with packets produces by ssh connection. To exclude ssh connection from tcpdump output we can use command:
# tcpdump -i eth0 not port 22
where eth0 is your network interface.
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Badblocks linux command lets you to check for bad blocks on your hard drive. Very useful for new hard drives or drives which we are not sure about.
#badblocks -s /dev/hda
where /dev/hda is your block device.
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To resize image with imagemagick is very easy. To resize image to the size 50% smaler than original image use command:
convert -resize 50% image.jpg image_resized.jpg
To resize image to specific size in pixels:
convert -resize 152×26 image.jpg image_resized.jpg
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