Tag: Pipe

A pipe is a form of redirection in Linux used to connect the STDOUT of one command into the STDIN of a second command. It allows us to narrow the output of a string of commands until we have an easily digestible amount of data. The pipe character is the | symbol and is placed between any two commands. Pipes are one of the most used command-line features that Linux has. Every article showing Linux commands will almost inevitably include pipes. 

What is Bash?

Bash, or the Bourne Again SHell, is based on the Bourne shell. It is the default shell command language interpreter for GNU Linux/Unix and is accessed via a terminal. The shell was the original method for interacting with the operating system before GUIs were implemented. It has the ability to execute single commands, understand regular expressions, as well as scripts written in the bash language. It is currently the default interactive shell on most all modern Linux distributions.

• These instructions are intended specifically for listing the existing compiled PHP modules from the command line.
• Your server environment may be different, but we will go over several options that you might run into. We'll be using an Ubuntu Server with only a single PHP version on it, and two CentOS 7 servers, one with cPanel and one with InterWorx.

Single PHP Version

If your server only has a single PHP version installed, you can run this PHP command anywhere, and it will give you the same list of modules. The general command we will be using is php -m. This command will give you the full list of installed PHP modules/extensions.