Compressing images directly on web server – Better Pagespeed tips

for png, install on centos using command

yum install optipng

for a single image

optipng -o5 filename.png

move to folder in which pngs are stored and use the following command:

for i in *.png; do optipng -o7 -strip all  -quiet "$i"; done

this will overwrite all pngs, o7 is switch for number of tries. o5 will be less time consuming though. -quiet makes it muted, outputs nothing.
-strip all will try to remove all meta data.
you can use -preserve to preserve the modification date.
also try -keep, if you want to save backup of each file

How to unlike all Facebook pages from your profile and Clean your newsfeed

Hello humans, I have tried to keep this tutorial simple and detailed. Please proceed with caution.

The following tutorial and the procedure will unlike pages you have liked from your profile, Please be clear about that the fact that the code provided here is clean and does not intend to do any harm to your Facebook account.

Note – This code uses jQuery library in its original form. So you do not need to be scared while using this “scary” looking code.

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