My notes on technology, entrepreneurship and life.

How to check if you are running PHP in CGI mode or Apache

lalitmangal — Tue, 11 Oct 2011 15:38:59 +0000

MySQL select from a predefined list or set of values as a table

lalitmangal — Tue, 26 Apr 2011 14:06:00 +0000

SELECT 20203 AS item_id
UNION ALL SELECT 20204
UNION ALL SELECT 20205
UNION ALL SELECT 20206
UNION ALL SELECT 20223
UNION ALL SELECT 20207
UNION ALL SELECT 20208

When nohup should not create nohup.out

lalitmangal — Wed, 13 Apr 2011 11:45:47 +0000

nohup script…. 1>/dev/null 2>&1 &

Building an Igloo

lalitmangal — Sat, 19 Mar 2011 18:50:13 +0000

http://www.bbc.co.uk/emp/external/player.swf

To remove old files from a large directory

lalitmangal — Tue, 22 Feb 2011 11:52:19 +0000

find . -mtime +29 -print | xargs rm -r

Find and Copy All Files Matching a Pattern Into a Single Directory

lalitmangal — Mon, 07 Feb 2011 10:24:55 +0000

find . -type f -iname ‘*.zip’ -exec cp {} ~/zip/ \;

find . -name -type f “*.bak*” -exec tar -cvf MigrationBAKFiles.tar {} \;

http://sysadmingeek.com/articles/find-and-copy-all-files-matching-a-pattern-into-a-single-directory/

Fun is the Future: Mastering Gamification Notes

lalitmangal — Thu, 27 Jan 2011 05:05:37 +0000

Fun is the Future: Mastering Gamification Notes:
————————————————-
Gamification: is the usage of Game thinking and game mechanics to solve problems and engage audiences.
Fun and Theme are not correlated. Theme is a lure for bring people in. Anything can be made fun.
Loyalty programs no more work on redemption, but on status – Foursquare.com
Loyalty choices are now public. If your product is not the one specified or chosen in the public sphere, its a light demerit against your product.
Users are increasingly faced with compulsary and optional choices.
Once we get into optional/disposable options/time, user are going to gravitate towards the most *rewarding* experience. Games have a big advantage over anything else.
Games are the only way to get people to act against their self-interest, in a predictable way without any external force.
4Type of Players in a Game:
- Achiever (10%) – they play to win
- Socializer (80%) – looking for a casual, non-confrontational, easily replicable interaction.
- Explorer – They play for the social credit of having discovered something.
- Killer – (1%) They want to kick butt.

Killer are Most engaged, want attention. A game designer would not discourage killer’s participation, but would put these guys on rails. Direct their behaviour to let them have the recognition they want and get the most of their participation.

Reward Early, Reward Often, Try not to go negative.
Fun and engagement is the new metric. Consumers are increasingly expecting fun and engagement in their experience of products and services.

Diskusage command

lalitmangal — Fri, 21 Jan 2011 10:15:59 +0000

du -sh * | sort -n

Water stream sound track

lalitmangal — Sat, 08 Jan 2011 14:54:37 +0000

http://www.audiomicro.com/water-stream-run-river-flow-loop-sound-effects-70714

iptables quick reference

lalitmangal — Wed, 05 Jan 2011 19:36:38 +0000

/sbin/iptables -A INPUT -s -j ACCEPT
/sbin/iptables -A INPUT -s -j ACCEPT
/sbin/iptables -A INPUT -p tcp –dport -j DROP
/sbin/iptables -A INPUT -p tcp –dport -j DROP
/sbin/iptables -A INPUT -p tcp –dport 25 -j DROP
/sbin/iptables -A INPUT -p tcp –dport 25 -j DROP
/sbin/iptables -A INPUT -j DROP

For Inserting on top

/sbin/iptables -I INPUT -s -j ACCEPT

For deleting a rule

/sbin/iptables -D INPUT 4