通过SSH服务，实现本机（192.168.145.128）与远程服务器(192.168.145.129)之间的连接，能够在本地对服务器进行操作。
1、实现SSH连接需要有SSH客户端和SSH服务端。一般Centos7自带了SSH客户端 2、在服务器上输入命令：yum -y install openssh-server 安装SSH服务端
[root@localhost ~]# yum install -y openssh-server ///安装openssh-server [root@localhost ~]# ps -ef | grep sshd ///查看sshd进程服务是否已启动 root 23675 1 0 08:56 ? 00:00:00 /usr/sbin/sshd -D root 23683 20222 0 08:57 pts/0 00:00:00 grep --color=auto sshd3、在客户端上，切换为我们想要实现远程连接的本地用户账号，执行以下命令：
[root@localhost ~]# su root ///切换到root用户 [root@localhost ~]# ssh-keygen -t rsa ///通过ssh-keygen 命令生成密钥 Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): ///生成密钥文件，之后不需要输入密码，按三次回车键即可 Created directory '/root/.ssh'. Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /root/.ssh/id_rsa. Your public key has been saved in /root/.ssh/id_rsa.pub. The key fingerprint is: SHA256:mCsplTBihY485MQV8hOt2wYV4thcEnhmYHPZsysOVfU root@localhost.localdomain The key's randomart image is: +---[RSA 2048]----+ |.==X*oo. | |.*@==* . | |Oo**+ o E | |o* *.o o | | o * + S | | . + = . | | + = . | | o . | | | +----[SHA256]-----+4、进入到.ssh目录，查看是否已生成密钥和公钥
[root@localhost .ssh]# ls id_rsa id_rsa.pub ///前者为密钥、后者为公钥 [root@localhost .ssh]# ll 总用量 8 -rw-------. 1 root root 1679 11月 1 08:51 id_rsa -rw-r--r--. 1 root root 408 11月 1 08:51 id_rsa.pub5、将客户端生成的公钥发送给服务端
[root@localhost .ssh]# ssh-copy-id 192.168.145.129 ///将服务端公钥复制给客户端，并重命名为authorized_keys root@192.168.145.129's password: ///输入服务端的密码 Number of key(s) added: 1 Now try logging into the machine, with: "ssh '192.168.145.129'" ///生成成功 and check to make sure that only the key(s) you wanted were added.6、进入到客户端，查看是ssh公钥否已从服务端复制到客户端
[root@localhost ~]# cd .ssh/ [root@localhost .ssh]# ls authorized_keys ///复制成功7、在服务端机器上进行连接客户端机器
[root@localhost .ssh]# ssh root@192.168.145.129 ///连接客户端机器 Last login: Fri Nov 1 09:16:23 2019 from 192.168.145.128 [root@localhost ~]# exit ///退出连接客户端机器 登出 Connection to 192.168.145.129 closed.1、文件权限
#chmod 700 .ssh #chmod 600 authorized_keys2、如果要求只能通过密钥连接，那么可以修改服务端的sshd_config配置文件。 将被注释掉的#PasswordAuthentication yes 改为PasswordAuthentication no 。
scp是secure copy、一个在linux下用来进行远程拷贝文件的命令
1、把本地根目录下的villian.txt文件拷贝到192.168.206.148端的/home/work目录下
[root@localhost ~]# scp /root/villian.txt root@192.168.206.148:/home/villian/2、把192.168.206.148端的villian.txt文件拷贝到本地的/home/villian目录下
[root@localhost ~]# scp root@192.168.206.148:/home/villian/villian.txt /root/3、把192.168.206.148端的villian.txt文件拷贝到192.168.206.149端的/home/villian目录下
[root@localhost ~]# scp root@192.168.206.148:/home/villian/villian.txt root@192.168.206.149:/home/villian/4、拷贝文件夹，需加-r参数
scp -r /home/villian/soft root@192.168.206.148:/home/work/1、从linux系统复制文件到windows系统
[root@localhost ~]# scp /root/villian.txt administrator@192.168.3.181:/d:/2、在linux环境下，将windows下的文件复制到linux系统中：
[root@localhost ~]# scp administrator@192.168.3.181:/d:/test/abc.txt /root备注：
administrator是windows的用户名，比如我的windows用户名是villian；192.168.3.181是你windows的ip；/root是你要存放的Windows路径；因为windows系统本身不支持ssh协议，所以，要想上面的命令成功执行，必须在windows客户端安装ssh for windows的客户端软件；lrzsz命令也可以实现Linux端与Windows端互传文件；