Linux shell执行 ssh免密登录设置

一、安装sshpass

yum install sshpass -y

二、生成rsa公钥和私钥

[root@glusterfs03 .ssh]# ssh-keygen -t rsa -f /root/.ssh/id_rsa

[root@glusterfs03 .ssh]# ll /root/.ssh/ -a
total 12
drwx------  2 root root   57 Aug 22 16:34 .
dr-xr-x---. 5 root root  252 Aug 22 16:22 ..
-rw-------  1 root root 1675 Aug 22 16:25 id_rsa
-rw-r--r--  1 root root  398 Aug 22 16:25 id_rsa.pub
-rw-r--r--  1 root root  358 Aug 22 10:20 known_hosts
[root@glusterfs03 .ssh]# 

 

三、将公钥id_rsa.pub复制到目标服务器上

[root@glusterfs03 .ssh]# sshpass -phl95test123 ssh-copy-id -i /root/.ssh/id_rsa.pub -o StrictHostKeyChecking=no -f root@172.28.17.221

-p:ssh密码

-i:指定公钥文件

-f:强制覆盖

[root@localip .ssh]# ll /root/.ssh/ -a
total 12
drwx------. 2 root root   48 Aug 22 16:39 .
dr-xr-x---. 5 root root 4096 Aug 22 09:15 ..
-rw-------  1 root root  398 Aug 22 16:39 authorized_keys
-rw-r--r--. 1 root root  541 Aug 22 10:30 known_hosts

目标服务器多了一个authorized_keys文件

四、执行sync命令，不需要输入密码即可同步文件

[root@glusterfs03 synctest]# rsync -P -artzhe 'ssh -p 22' --delete root@172.28.17.221:/home/hl95/webapps/fs1/100000/audio/ /home/synctest/
receiving incremental file list
./
202206071350491001123456789011234561779163625719623.mp3
         59.66K 100%   56.90MB/s    0:00:00 (xfr#1, to-chk=32/34)
202206071401451001123456789011234561779163625719623.mp3
         35.76K 100%    5.68MB/s    0:00:00 (xfr#2, to-chk=31/34)
202206071559191001123456789011234561779163625719623.mp3
         50.73K 100%    6.91MB/s    0:00:00 (xfr#3, to-chk=30/34)
20220607/
20220607/202206071130121001123456789011234561779163625719623.mp3

 

rsync -P -artzhe 'ssh -p 22' --delete /home/synctest/ root@172.28.17.221:/home/synctest-1/

将本地的指定目录同步到目标服务器上指定目录