升级方式
命令行升级
正常情况下使用如下命令即可:
sudo do-release-upgrade
当提示如下错误信息时,得先升级本地软件包:
Please install all available updates for your release before upgrading.
sudo apt update
sudo apt upgrade
sudo apt dist-upgrade
sudo do-release-upgrade
阿里最新源:
sudo gedit /etc/apt/sources.list
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
软件更新器
这里会弹出升级按钮,点击之后就会提示你是否升级到20.04版本,由于博主这里已经成功安装,提示不一样了。
升级成功后,命令行查看:
sudo lsb_release -a
错误情况
软件更新
博主遇到的问题是,没有禁用软件更新->其他软件的源,导致一直升级失败!
在Ubuntu18.04版本下,建议关闭这些源