Linux+ is a certification of knowledge of Linux operating systems, from their installation and use to the basics of applicable free software and open source licenses.
The Linux+ exam is intended for information technology professionals who have between six to twelve months of practical experience using Linux. The exam is broken down into several areas of Linux expertise: installation, management, configuration, security, documentation, and hardware.
The test is a computer‐based multiple-choice exam, with a question followed by four possible answers, at least one (but possibly more) of which must be correct. Common subject matter for exam topics include installation methods, boot loader configuration, managing packages (Debian and RPM management systems are covered), navigating directories via the command line, using the bash shell, security considerations, network administration including TCP/IP configuration), mounting file systems (such as NFS, SMB or ext3) and managing configuration files for the more common applications that Linux servers are expected to run. Although configuring and running the X Window system is included in the formal exam objectives, there are rarely any questions pertaining to this as the exam focuses on Linux as a server and network operating system rather than for use as a desktop platform.
The Linux+ exam has undergone some criticism since its inception, due to the excessive amount of hardware‐related questions that were on the exam initially, many of which were covered on the A+ exam. The newest version of the exam, available as of February 2005, does away with this problem.
The Computing Technology Industry Association (CompTIA) has announced it will soon begin the process of updating its CompTIA Linux+ certification. The update process will begin with a Job Task Analysis (JTA), around July, 2008. The JTA will bring together subject matter experts in Linux to evaluate the job roles and tasks for IT professionals who work with open source operating systems. This information will be the input used to update the exam objectives and items.