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文件: /usr/share/doc/update-manager-core/README
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Software Updater for apt ------------------------ This is an application which lets you manage available updates for your computer via apt and python-apt. It also supports easy release upgrades. The following environment variables are honored: DEBUG_UPDATE_MANAGER: - If set, debug information is printed to sys.stderr. This is useful for testing e.g. release upgrade checking/fetching. If the release upgrade is running in text mode and gnu screen is available it will automatically use gnu screen. This means that if e.g. the network connection is dropping just running the upgrader again will just reconnect to the running upgrade.
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