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JackieMe sid 比 testing 更加不稳定吧?
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testing
The testing distribution contains packages that haven't been accepted into a stable release yet, but they are in the queue for that. The main advantage of using this distribution is that it has more recent versions of software.
See the Debian FAQ for more information on what is testing and how it becomes stable.
The current testing distribution is bullseye.
unstable
The unstable distribution is where active development of Debian occurs. Generally, this distribution is run by developers and those who like to live on the edge. It is recommended that users running unstable should subscribe to the debian-devel-announce mailing list to receive notifications of major changes, for example upgrades that may break.
The unstable distribution is always called sid