1、使用rsync進行資料同步

格式：rsync 【選項】 原始檔 目標檔案

常用選項：

-a，--archive（存檔）歸檔模式，表示以遞迴的方式傳輸檔案，並且保持檔案屬性

-z，表示壓縮傳輸

-P，顯示傳輸進度

--delete，刪除那些目標檔案有而原始位置沒有的檔案

例：在niexj21上建立/mnt/test1，把檔案/mnt/，備份到niexj22的/backup檔案中

[root@niexj21 ~]# touch /mnt/test1

[root@niexj22 ~]# mkdir /backup

[root@niexj21 ~]# rsync -azP /mnt 192.168.1.22:/backup

[root@niexj22 ~]# ls /backup
mnt

[root@niexj22 ~]# ls /backup/mnt/
test1

兩臺主機之間實現無交付連線

[root@niexj21 ~]# ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 直接回車
Enter passphrase (empty for no passphrase):
Enter same passphrase again: 直接回車
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:直接回車

[root@niexj21 ~]# ssh-copy-id 192.168.1.22
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
[email protected]'s password:輸入密碼

測試

[root@niexj21 ~]# touch /mnt/test2
[root@niexj21 ~]# rsync -azP --delete /mnt 192.168.1.22:/backup #直接回車不需要輸入密碼

[root@niexj22 ~]# ls /backup/mnt/
test1 test2