增加 Ubuntu 系统升级.
Signed-off-by: ithink.chan <chenyang@autoai.com>
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# Ubuntu 系统升级
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* 不是升级软件包,而是升级整个系统。 *
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## 从命令行升级
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先升级软件包
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```sh
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sudo apt update && sudo apt dist-upgrade
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```
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如果没有 update-manager-core 需要先安装
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```sh
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sudo apt install update-manager-core
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```
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如果希望从 LTS 升级到非 LTS 版本,还需要修改 /etc/update-manager/release-upgrades
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```sh
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# /etc/update-manager/release-upgrades
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# 将 Prompt=lts 修改为如下内容
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Prompt=normal
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```
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之后输入以下命令进行系统升级:
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```sh
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sudo do-release-upgrade
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```
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如果升级过程中出现了“Upgrade tool 404 Not Found [IP: 59.80.44.45 80]”字样错误,可以尝试修改 /etc/apt/sources.list 为国内(如清华)镜像。
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