ubuntu系统升级2

sudo apt update

sudo apt upgrade 

sudo apt dist-upgrade

sudo apt install update-manager-core

 

sudo nano /etc/update-manager/release-upgrades

并确保文件包含：

Prompt=lts

sudo do-release-upgrade

 

如遇：Failed to connect to https://changelogs.ubuntu.com/meta-release-lts. Check your Internet connection or proxy settings异常

检查网络是否正常

ping -c 4 changelogs.ubuntu.com

 

检查Ubuntu 的 changelogs 服务器是否有问题

curl https://changelogs.ubuntu.com/meta-release-lts

 

 

检查证书是否同步

sudo update-ca-certificates --verbose --fresh

export SSL_CERT_DIR=/etc/ssl/certs

忽略证书

sudo nano /usr/lib/python3/dist-packages/UpdateManager/Core/MetaRelease.py

from __future__ import absolute_import, print_function

import ssl
ssl._create_default_https_context = ssl._create_unverified_context

import apt
import apt_pkg

　升级完成后重启服务器

完成之后重启服务器
sudo shutdown -r now

查询ubuntu版本号
lsb_release -a