Missing time synchronization, scm console cannot start properly. Because of time sync, I installed ntpdate like below; 2011/10/07 - [Programming] - CentOS: time syncronization in local network / setting timezone However time sync is broken after 2 months. So, to prohibit this problem, I wrote 'crontab' on every server. 0 0 * * * /sbin/ntpdate [ntp server] > /dev/null 2>&1

http://hook.tistory.com/entry/RHEL-CentOS%EC%97%90%EC%84%9C-ntp-%EC%84%9C%EB%B2%84-%EC%84%A4%EC%A0%95%ED%95%98%EA%B8%B0%EC%82%AC%EC%84%A4%EB%A7%9D-%EB%82%B4%EB%B6%80-%EC%84%9C%EB%B2%84%EB%93%A4%EC%9D%98-%EC%8B%9C%EA%B0%84-%EB%8F%99%EA%B8%B0%ED%99%94 server1: x.y.w.z1 server2: x.y.w.z2 server3: x.y.w.z3 all servers # yum install ntp -y server1 # vi /etc/ntp.conf # Permit time synchronization with..