Ubuntu16.04安装ssh服务端
电脑联网的情况下自动安装流程：
打开终端
1.安装ssh服务端
sudo apt-get install openssh-server
2.查看有没有成功启动ssh
ps -aux | grep ssh
显示有 /usr/sbin/sshd
root 1147 0.0 0.3 65512 6196 ? Ss 4月08 0:12 /usr/sbin/sshd
3.启动ssh或者重启ssh
/etc/init.d/ssh start 或 /etc/init.d/ssh restart
问题解决：
1.在第一步安装ssh服务端的时候如果遇到 软件包有未满足的依赖关系错误，原因是openssh-client与openssh-server所依赖的版本不同，解决方法是下载对应版本的openssh-client后再下载openssh-server。
sudo apt-get install openssh-client=1:7.2p2-4 下载openssh-client 等于号后面跟的是错误提示里面括号里面的内容
2.使用外国的souce源会比较慢，有时候还会报连接不上的错误，下面添加阿里源，当然国内其他源也可以
备份/etc/apt/sources.list
#备份
cp /etc/apt/sources.list /etc/apt/sources.list.bak
在/etc/apt/sources.list文件前面添加如下条目
#添加阿里源
deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
最后执行如下命令更新源
##更新
sudo apt-get update
sudo apt-get upgrade
参考：