1.scp全量备份

[root@backup ~]# scp /etc/hosts @172.16.1.31:/tmp
The authenticity of host '172.16.1.31 (172.16.1.31)' can't be established.
ECDSA key fingerprint is SHA256:Btpe0aClmIFPkhkbOMJKk2SQRh+6YgJxzawLWDtz/GU.
ECDSA key fingerprint is MD5:27:01:76:c5:87:fe:04:48:b2:ca:85:95:97:55:04:a6.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '172.16.1.31' (ECDSA) to the list of known hosts.
root@172.16.1.31's password: 
hosts                                                                   100%  349   177.9KB/s   00:00  

[root@nfs /tmp]# ll
total 0
[root@nfs /tmp]# ll
total 4
-rw-r--r-- 1 root root 349 Jun 26 21:42 hosts

2.rsync增量备份

推送
root@backup /tmp]# rsync -av /etc 172.16.1.31:/tmp/
etc/yum/vars/infra

sent 27,575,783 bytes  received 37,007 bytes  3,681,705.33 bytes/sec
total size is 27,448,441  speedup is 0.99

[root@nfs /tmp]# ll
total 0
[root@nfs /tmp]# ll
total 12
drwxr-xr-x 79 root root 8192 Jun 25 09:12 etc

拉取
[root@backup /tmp]# ll
total 0
[root@backup /tmp]# rsync -av 172.16.1.31:/etc/hosts /tmp
root@172.16.1.31's password: 
receiving incremental file list
hosts

sent 43 bytes  received 440 bytes  138.00 bytes/sec
total size is 349  speedup is 0.72
[root@backup /tmp]# ll
total 4
-rw-r--r-- 1 root root 349 Jun 25 09:12 hosts