一、 客户端是linux
    1.在客户端生成密钥对
    [root@localhost ~]# ssh-keygen -t rsa <== 建立密钥对，-t代表类型，有RSA和DSA两种
    Generating public/private rsa key pair.
    Enter file in which to save the key (/root/.ssh/id_rsa): <==密钥文件默认存放位置，按Enter即可
    Created directory ‘/root/.ssh’.
    Enter passphrase (empty for no passphrase): <== 输入密钥锁码，或直接按 Enter 留空
    Enter same passphrase again: <== 再输入一遍密钥锁码
    Your identification has been saved in /root/.ssh/id_rsa. <== 生成的私钥
    Your public key has been saved in /root/.ssh/id_rsa.pub. <== 生成的公钥
    The key fingerprint is:
    SHA256:K1qy928tkk1FUuzQtlZK+poeS67vIgPvHw9lQ+KNuZ4 root@localhost.localdomain
    The key’s randomart image is:
    +—-[RSA 2048]——+
    | +. |
    | o . |
    | . .O + |
    | .     . |
    | S =+ |
    | . =… |
    | .oo =+o+ |
    | ==o+B    o. |
    | oo.=EXO. |
    +——[SHA256]——-+

    cat ~/.ssh/authorized_keys # 查看保存公钥

    cat ~/.ssh/idrsa.pub #查看当前主机公钥
    二、 客户端是mac
    1 $ ssh- keygen #建立密钥对
    2 Generating public/private rsa key pair.
    3 Enter file in which to save the key (/Users/schacon/ . ssh/id rsa): #密钥文件默认存放位置，按Enter即可
    4 Enter passphrase ( empty for no passphrase) :
    5 Enter same passphrase again:
    6 Your identification has been saved in /Users/ schacon/ .ssh/id     rsa. #生成的私钥
    7 Your public key has been saved in /Users/schacon/ . ssh/id_ rsa . pub . #生成的公钥
    8 The key fingerprint is:
    9 43: c5:5b:5f:b1:f1: 50:43:ad:20:a6 :92:6a:1f:9a:3a schacon@Wi kky ‘ sMacBookPro. local ,
    image.png






    **