MyEnglish - When writing "I am happy or I was happy" which is correct?

It might be worth starting with the present-tense version:
I am happy to be in Seoul > I am in London now, and I am happy that I am in Seoul.
I am happy to have been in Seoul during the Olympics > I may or may not be in Seoul now, but I am happy that I was there during the Olympics.

Putting these sentences into the past tense:
I was happy to be in Seoul > I was in London at the time I'm speaking about, and I was happy [then] that I was in Seoul.
I was happy to have been in Seoul during the Olympics > I may or may not have been in London at the time I'm speaking about, but I was happy [then] that I had been there

@Thank you
http://forum.wordreference.com/showthread.php?t=2493680

Maven - install the artifactory for repository.

@ Download last version of Artifactory the following URL
@ http://sourceforge.net/projects/artifactory/files/artifactory/

@ Change the user(as root)
$ sudo -s

@ uncompress the file
$ unzip ./artifactory-3.2.1.1.zip

@ Move and change the artifactory
$ mv ./artifactory-3.2.1.1 /usr/local/artifactory

@ Execute the shell
$ /usr/local/artifactory/bin/installService.sh

@ Start the artifactory
$ /etc/init.d/artifactory start

MyTed - I have to listen to the Ted list.

http://www.ted.com/talks/joel_selanikio_the_surprising_seeds_of_a_big_data_revolution_in_healthcare?language=en

MyDesign - I was praised from the professor for the design.

A few months ago, I had been to South Korea for a week.

I took out my portfolio I did when I was students, about 17 years ago(this year is 2014) 

While I was checking these, I had found a something.

I have a good memory, I was praised from the professor for this design.

I thought I was a better than other things, I was happy. 

Linux - setting iptables on ubuntu

@https://www.digitalocean.com/community/articles/how-to-set-up-a-firewall-using-ip-tables-on-ubuntu-12-04

$ iptables -A INPUT -p tcp --dport ssh -j ACCEPT
$ iptables -A INPUT -p tcp --dport 80 -j ACCEPT
$ apt-get install iptables-persistent
@yes, yes
$ service iptables-persistent start