Security advisor is a very useful server security alert which is an open source addon for cPanel server. This addon collects security information from the server and displays it in a single page when you access security advisor within your cPanel.
nslookup (stands for name server lookup) is a network utility program used to test and troubleshoot DNS servers. As appears from its name, it gets name server information for domains by querying the DNS.
Each Linux server has a diretcory named /tmp which is installed with individual file system. it is used to hold temporary files. /tmp directory have all the all the website session files which is hosted on serve.
What does CGI mean? CGI stands for Common Gateway Interface . This is a standard way for webhosting servers to interface executable scripts with end users. Most of the hosts does not allow to execute those scripts outside the CGI-BIN folder.