ubuntu下安装及启动ssh

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</script>在终端使用命令测试：

ssh localhost

如果出现以下错误，则很可能是因为还没有安装ssh-server：

ssh: connect to host localhost port 22: Connection refused

安装SSH-server：

sudo apt-get install openssh-server

启动SSH-Server

sudo /etc/init.d/ssh start