How to add a command or binary to CageFS for all users using Filesystem Templates

Introduction

In some circumstances, you may need to extend the functionality of your shell users on a server using CageFS. This article will demonstrate how to enable a command to all CageFS users by using Filesystem Templates.

Procedure

1. Login to the server as the root user via Terminal or SSH
2. Create a new file with a name that makes sense for the binary that you are adding. For example:
   

   touch /etc/cagefs/conf.d/myCustomBinary.cfg

   You should not directly edit existing files in the /etc/cagefs/conf.d directory. CloudLinux updates will remove changes to files provided by CloudLinux, so a new file is required for any customizations.
3. Open the file you created with your favorite text editor and add the following configuration. Be sure to update the specifics to match your own binary:

   [my-custom-binary]
   comment=This is a binary that is not typically found inside of CageFS.
   
   paths=/bin/my-custom-binary, /usr/bin/another-custom-binary

4. Then update CageFS to include the changes:
   

   cagefsctl --force-update

Additional Resources

CloudLinux OS Components: File system templates