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Stable Release Updates
 
(
SRUs
). There's an entire process around how these updates are 
approved, but the general take away is that there should be a good 
reason to implement a major version change in a stable, long-term 
Ubuntu release.

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Managing Software Packages
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 80 
]
Traditionally, each distribution has its own package format, and its own utilities 
to manage them. Ubuntu utilizes 
Debian packages
 (with package names ending 
in 
.deb
) as the main package format, which Ubuntu inherits from the Debian 
distribution (Ubuntu is forked from Debian, which means that it uses Debian as 
a foundation). Ubuntu and Debian utilize the 
apt
 and 
dpkg
 commands to manage 
packages. On the other hand, distributions such as CentOS and Red Hat use