增加 Ubuntu 系统升级.

Signed-off-by: ithink.chan <chenyang@autoai.com>
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ithink.chan 2019-12-24 14:25:44 +08:00
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# Ubuntu 系统升级
* 不是升级软件包,而是升级整个系统。 *
## 从命令行升级
先升级软件包
```sh
sudo apt update && sudo apt dist-upgrade
```
如果没有 update-manager-core 需要先安装
```sh
sudo apt install update-manager-core
```
如果希望从 LTS 升级到非 LTS 版本,还需要修改 /etc/update-manager/release-upgrades
```sh
# /etc/update-manager/release-upgrades
# 将 Prompt=lts 修改为如下内容
Prompt=normal
```
之后输入以下命令进行系统升级:
```sh
sudo do-release-upgrade
```
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。