Juniper Switch Commit problem / 주니퍼 스위치 commit 에러

Error(s): 
1)error copying files (/config/juniper.conf.3.gz->/var/db/config/juniper.co nf.4.gz): No such file or directory 
2)error: rotation of old files failed

>start shell

%cd /config

%mkdir db

%cd db

%mkdir config

%cli

>configure

#commit

출처: http://xdstupid.blogspot.kr/2011/12/juiper-switch-commit-problem.html