Linux之间建立信任机制 ssh

两台linux服务器之间传输数据或执行命令，操作上具体到ssh或linux版本不同可能会有所差异：

1、建立公匙

2、配置公匙，建立信任机制

3、传输文件/数据

4、远程执行命令

 

公匙产生:
公匙方式一
$ cd ~
$ cd .ssh
$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in .ssh/id_rsa.
Your public key has been saved in .ssh/id_rsa.pub.
The key fingerprint is:
4d:5d:0e:9f:98:b6:56:aa:ce:4b:d3:c3:81:71:88:6a
公匙方式二
$ cd ~/.ssh
$ ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (.ssh/id_dsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in .ssh/id_dsa.
Your public key has been saved in .ssh/id_dsa.pub.
The key fingerprint is:
83:25:2a:e1:de:02:c6:00:ff:50:c2:16:e3:1e:42:b7

$

 

文件传输：A 192.168.0.2  B 192.168.0.1
设要把 A上的 /root/abc.sh 传到 B机并放到/abc目录，可以在A机上用命令
    scp  /root/abc.sh 
若 SSH端口不是默认的22，比如，是端口1234 则加-P参数：
    scp  -P 1234 /root/abc.sh 

也可以在B机上用命令：
    scp    /abc/

配置公匙文件:
1.公匙复制 scp    ~/.ssh/id_rsa_2.pub
2.公匙配置 cat ~/.ssh/id_rsa_2.pub>>~/.ssh/authorized_keys
以上两步将A的公匙配置到B服务器
B服务器可以直接登录A服务器了

命令执行：
$ ssh -h
ssh: illegal option -- h
usage: ssh [-1246AaCfghkMNnqsTtVvXxY] [-b bind_address] [-c cipher_spec]
           [-D port] [-e escape_char] [-F configfile] [-i identity_file]
           [-L port:host:hostport] [-l login_name] [-m mac_spec] [-o option]
           [-p port] [-R port:host:hostport] [-S ctl] [user@]hostname [command]
          
例如:从B机器发送命令到A机器
ssh 192.168.0.2 'source ~/.bash_profile; pwd;ls'
以上命令导入机器环境,并显示目前目录和目录下内容