2臺機器分別執行ssh-keygen生成公鑰和金鑰

[[email protected] ~]# ssh-keygen
生成.ssh資料夾及id_rsa和id_rsa.pub
[[email protected] .ssh]# ll
total 16
-rw-------. 1 root root 1675 Dec 13 21:37 id_rsa
-rw-r--r--. 1 root root  396 Dec 13 21:37 id_rsa.pub

選取第一臺,生成authorized_keys檔案

[[email protected] ~]# cd .ssh
[
 
[email protected] .ssh]# cat ./id_rsa.pub >> ./authorized_keys

將另一臺id_rsa.pub內容,手動copy到第一臺的authorized_keys檔案

[[email protected] .ssh]# more id_rsa.pub
拷貝至`authorized_keys`檔案(注意copy時,最好先放到記事本中,將回車去掉,成為一行)

設定每臺機器的許可權

[[email protected] ~]# chmod 700 -R ~/.ssh
[[email protected]
 
 ~]# chmod 600 ~/.ssh/authorized_keys 

將第一臺的authorized_keys scp 給hadoop-02(第一次傳輸,需要輸入密碼)

[[email protected] ~]#  scp authorized_keys [email protected]:/root/.ssh

配置/etc/hosts(兩臺機器都要配置)

[[email protected] ~]# vi /etc/hosts
將兩臺機器的IP和機器名都寫入
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.137.130 hadoop-01
192.168.137.131 hadoop-02
 

驗證(每臺機器上執行下面的命令,只輸入yes,不輸入密碼,則這兩臺互相通訊了)

[[email protected] ~]# ssh [email protected] date
[[email protected] ~]# ssh [email protected]01 date