I am sure you would have come to a situation when you would have to resize multiple images say you copied 200 images from your Digital Camera and now need to upload them and need to resize them all, now doing this using GIMP would take ages here is a easy way.

Step 1) Install ImageMagick

sudo apt-get install imagemagick

Step 2) Change to the Directory where all Images are Present

Step 3)

a) If you need to reduce images to a specific Percentage

mogrify -resize 20% -format jpg *

b) If you need to reduce to Specific Width & Height

mogrify -resize 800x600 -format jpg *

c) If you need to reduce to Specific Width

mogrify -resize 1024x -format jpg *

Further Reading Click Here !!!

Managing users & groups since long but have you ever looked/reviewed the list of users present in a Specific Group after adding them, so here is a single line command for my lazy sysadmins :)

$ getent group | awk -F: '{print $4}'

you may use this when doing a security audit.

June 6 2012, is being celebrated worldwide as the IPv6 Launch Day, I just added an IPv6 to my blog and the IPv6 of this blog is 2607:f298:1:107::c53:5ffc

IPv6 was planned in the year 1996 but took decades to get launched many ISP's are still not supporting it but will soon start supporting the same. ISP's in India are yet to start their support to IPv6.

Here is a video of Vint Cerf, Chief Internet Evangelist at Google, and a founding father of the Internet, discusses the next version of the Internet, IPv6, and why we need it.