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Amazon Elastic Compute Cloud
User Guide for Linux Instances

Managing Software on Your Linux Instance

The base distribution of Amazon Linux contains many software packages and utilities that are required for basic server operations. However, many more software packages are available in various software repositories, and even more packages are available for you to build from source code.

It is important to keep software up-to-date. Many packages in a Linux distribution are updated frequently to fix bugs, add features, and protect against security exploits. For more information, see Updating Instance Software.

By default, Amazon Linux instances launch with two repositories enabled: amzn-main and amzn-updates. While there are many packages available in these repositories that are updated by Amazon Web Services, there may be a package that you wish to install that is contained in another repository. For more information, see Adding Repositories. For help finding packages in enabled repositories, see Finding Software Packages. For information about installing software on an Amazon Linux instance, see Installing Software Packages.

Not all software is available in software packages stored in repositories; some software must be compiled on an instance from its source code. For more information, see Preparing to Compile Software.

Amazon Linux instances manage their software using the yum package manager. The yum package manager can install, remove, and update software, as well as manage all of the dependencies for each package. Debian-based Linux distributions, like Ubuntu, use the apt-get command and dpkg package manager, so the yum examples in the following sections do not work for those distributions.