The easyiest way is this:
find {path} -type f -exec grep -l {string_to_search} {} \;
in which you only replace {path} with the path you want to search , and {string_to_search} with the string you are looking for inside the files.
A quick and usefull command for checking if a server is under ddos is:
netstat -anp |grep ‘tcp\|udp’ | awk ‘{print $5}’ | cut -d: -f1 | sort | uniq -c | sort -n
You can check what connection you have via smtp protocol with the simple command:
netstat -a | grep smtp
During the life of a website, its quite common for pages to move around or to ‘re-structure’ your site’s files and folders. However, you can come across issues when people linking to your page go to their ‘stale’ bookmark of your site, and find that page is missing – in fact, they’ll get a ‘404 Page Not Found‘. The same will go for search engines like google and yahoo, and will adversely affect your rankings within their results.
This HOWTO explains how to get programs to launch when you login into your WM (Window Manager) and/or DE (Desktop Environment).
Read the fine article here.