Comments on: 20 Popular Command-Line Tips for Linux

By: GUru

GUru — Thu, 11 Oct 2012 12:53:22 +0000

Good one..

By: Rohit Vaidya

Rohit Vaidya — Tue, 28 Dec 2010 06:16:43 +0000

Coooool.

By: Dutchkind

Dutchkind — Mon, 27 Dec 2010 09:47:55 +0000

When I use nmap localhost on my opensuse system, it shows some ports open, but they are only open from the inside because they are used by the system. When I do a scan from another computer to this computer using the ip address instead of localhost it confirms that there are no open ports. So I think you can not see which ports are open or closed when scanning from that same system.

By: Sandeep

Sandeep — Mon, 27 Dec 2010 06:08:02 +0000

Thank you!!

By: Rick Stanley

Rick Stanley — Sun, 26 Dec 2010 23:53:55 +0000

convert:

Instead of
“convert -sample 30%x30% input_image.png output_image.png”
Use
convert -resize 30% input_image.png output_image.png”
to “Resize” an image! Aspect ratio will be preserved.

alias:

In addition to listing samples of aliases, also show the use of “alias” by itself to show what aliases are already defined!