Means to change ownership of a file. CH-change OWN-owner and group. From the man pag.:
The chown utility changes the user ID and/or the group ID of the specified files.
Why do I care
Every file in an operating system must be owned by something. Here are some examples.
When building packages, it is often necessary to change ownership of a file.
Example: Lets say I save a file to my desktop called dangerzone.pkg . It will change the file ownershp to Adam:1000 This means that my user ID is adam and my group membership number is 1000. If I want to change ownership to root:wheel I would use the following command.
sudo chown root:wheel ~/Desktop/dangerzone.pkg