Technical Glossary, Reference
There are currently 17 names in this directory beginning with the letter C.
Catch-All Address
The email address to which cPanel routes any email message sent to email accounts that do not exist on a domain. Also known as a Default Address.
Certificate
An electronic document that states the identity of a server so that the end user knows that he or she is communicating with the correct website.
Certificate Authority (CA) Bundle
A file on the server that verifies that your public and private keys were issued by a trusted entity. If your SSL provider sent you a CA bundle file, you can install it using the "Install SSL Certificate" feature in cPanel. Also known as an Intermediate Certificate.
CGI (Common Gateway Interface)
A protocol that lets a web server communicate with scripts and other software.
cgi-bin
The most common directory to store CGI programs on a web server. The "bin" part of "cgi-bin" is an abbreviation of "binary", dating back to when programs were referred to as "binaries".
chmod
An SSH command that allows you to set permissions (read, write, or execute) on a file or directory.
CLI (Command Line Interface)
A means of communicating with a server by typing commands. This is also often called a shell.
Client / Server
Computer technology that separates computers and their users into two categories. When you want information from a computer on the Internet, you are a client. The computer that delivers the information is the server. A server both stores information and makes it available to any authorized client who requests the information.
Cookie
A piece of information (login names, passwords, online "shopping cart" items, user preferences, etc.) sent by a web server to a web browser and saved to the computer. These "cookies" can then be used at a later date to restore the information when the web server is accessed again. Cookies are usually set to expire after a predetermined amount of time.
CPU Load
The amount of processing ability currently being consumed by programs on the server, measured in a percentage. More information about CPU loads can be found here.
Cron Job
A command on a server, executed at regular intervals. These commands are stored in a configuration file called crontab. You can manage your cron jobs using the "Cron Manager" feature in cPanel.
CRT (Certificate) File
An SSL certificate, an electronic document which ties a public key to a trusted entity. This electronic document is a key piece in an authentication process.
CSR (Certificate Signing Request)
A request, which you send to a Certificate Authority, for an SSL certificate. You can generate a CSR using the "Generate CSR" feature in cPanel, but since authorities vary with regard to the information they require, you should check their requirements before applying for a certificate.