jeltsch's blog

There are many possibilities, but perhaps the most friendly command is:
netstat -natp

How to install a forward proxy:

1. In a typical multi-host environment, you need to add a virtual server to the apache configuration. In order to do that, add a file (e.g. ForwardProxy.conf) to the sites-available directory. This file must contain the following configuration lines for the proxy to listen on port 8080:
   

   ProxyRequests On
   ProxyVia On

   Require ip 192.168

   ErrorLog /var/log/apache2/error_ForwardProxy.log
   CustomLog /var/log/apache2/access_ForwardProxy.log combined

How do you count the number of files in a directory? That becomes non-trivial if you have thousands of files in a directory. Your file manager chokes on counting them, especially if they are not local. On the Linux command line, this task is fast and easy:
ls | wc
ls lists your files one per row and wc returns three numbers: lines, words and bytes. In the file counting example, lines and words are the same and equal the number of files in the directory.