sudo do-release-upgrade
##或者
sudo apt-get disk-upgrade
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升级完发现ssh链接不上了!!bash
sudo service ssh restart ##失败,失败..
##重装吧
sudo apt remove openssh-server
sudo apt install openssh-server
sudo service ssh start
##报错:failed to restart sshd.service: Unit ssh.service is masked
##解决方法
sudo systemctl unmask ssh.service
sudo service ssh restart
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直接用vnc方式远程链接而后进行系统升级ssh