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

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1 2 3 4 5 6 7

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

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1	完成之后重启服务器<br>sudo shutdown -r now<br><br>查询ubuntu版本号<br>lsb_release -a