1. rsync 기본 사용법

     rsync -av 소스경로 저장경로

     rsync -av /var/log/ /home/data/

root@com1:/home/data# rsync -av /var/log/ /home/data/
sending incremental file list
./
auth.log
btmp
chrony/measurements.log
chrony/statistics.log
chrony/tracking.log
nova/nova-compute.log

sent 84,105,327 bytes  received 160 bytes  168,210,974.00 bytes/sec
total size is 153,421,880  speedup is 1.82

    옵션 :  -v : verbose

             -r : recurisively 데이터 복사

             -a : archive mode , 심볼릭 링크, 유저,그룹,권한, timestamp 복제

             -z : 파일 데이터 압축

2. 특정 폴더 파일 제외 설정

   옵션 :  --exclude '폴더'   --exclude '파일명'   --exclude '*.log'  

   rsync -av --exclude 'apt' /var/log/ /home/data/  

 root@com1:/home/data# rsync -av --exclude 'apt' /var/log/ /home/data/
sending incremental file list
./
alternatives.log
auth.log
auth.log.1
auth.log.2.gz
bootstrap.log
btmp
dmesg
dpkg.log
faillog
kern.log
kern.log.1
kern.log.2.gz
lastlog
syslog
syslog.1
syslog.2.gz
syslog.3.gz
syslog.4.gz
syslog.5.gz
syslog.6.gz
syslog.7.gz
wtmp

sent 153,252,964 bytes  received 1,178 bytes  102,169,428.00 bytes/sec
total size is 153,211,199  speedup is 1.00

3. 동기화 기능 (원본폴더의 file, 폴더 삭제시 복사본에서도 삭제)

sent 84,094,820 bytes  received 266 bytes  56,063,390.67 bytes/sec
total size is 153,644,716  speedup is 1.83 

 4. 진척도 확인

   옵션 : --progress, -P

   root@com1:/home/data# rsync -av --progress /var/log/ /home/data/ 

   root@com1:/home/data# rsync -av -P /var/log/ /home/data/  

 root@com1:/home/data# rsync -av --progress /var/log/ /home/data/
sending incremental file list
auth.log
      4,249,723 100%  148.95MB/s    0:00:00 (xfr#1, to-chk=72/75)
btmp
     79,631,616 100%  204.15MB/s    0:00:00 (xfr#2, to-chk=68/75)
chrony/measurements.log
        115,676 100%  303.67kB/s    0:00:00 (xfr#3, to-chk=39/75)
chrony/statistics.log
        106,116 100%  261.03kB/s    0:00:00 (xfr#4, to-chk=36/75)
chrony/tracking.log
         94,644 100%  232.81kB/s    0:00:00 (xfr#5, to-chk=33/75)
nova/nova-compute.log
        237,636 100%  581.62kB/s    0:00:00 (xfr#6, to-chk=7/75)

sent 84,458,379 bytes  received 157 bytes  168,917,072.00 bytes/sec
total size is 153,774,944  speedup is 1.82

5. 원격지 서버 ssh 이용한 rsync

  rsync -av 원본 계정@IP:폴더  

root@control:/home/user# rsync -av /var/log root@com1:/home/data/
sending incremental file list
log/auth.log
log/btmp

sent 62,954 bytes  received 76,833 bytes  55,914.80 bytes/sec
total size is 198,302,390  speedup is 1,418.60 

 일반 rsync 사용시 :: 사용, ssh 사용시 :

6. ssh 포트가 22번이 아닌 경우

   rsync -avz -e "ssh -p $portNumber"user@remoteip:/path/to/files/ /local/path/

7. 백업에 사용시

   a. ssh-keygen 을 통한 원격 서버 로그인 설정

   c. remote 서버의 file 이 압축되어 있을 경우 z 사용안함.