Very small help for vi:

http://www.cyberciti.biz/faq/save-file-in-vi-vim-linux-apple-macos-unix-bsd/

Network configuration file location in CentOs:
/etc/sysconfig/network-scripts/ifcfg-eth0

Before installation Kloxo-MR need to install wget:
yum install wget

Help for install Kloxo-MR in CentOs 6.3:

http://webmasterguide.us/?p=61

Good Luck!