1) Set up master DNS server (CentOS 6.5) yum install -y bind* Modify /etc/named.conf Create the zone files: /var/named/mylab.local /var/named/56.168.192.in-addr.arpa service named start chkconfig named on 2) Set up slave DNS server (CentOS 6.5) yum install -y bind* Modify /etc/named.conf service named start chkconfig named on 3) Reload the zone whenever the zone file … Continue reading Build Master/ Slave DNS in CentOS
Category: Linux
Use sed to append a file to another
To append file2 to a specific line in file1, here is command: sed -i "<line>r file2" file1 Example:
Update puppet tags
This script allow you to apply the specified puppet tags to the listed hosts. It will do a dry run against the first host, if you are happy with the results then you can kick off the changes to all hosts. The script can be downloaded from here.
Push public key to remote hosts in a batch
Sometimes it is easy to use the passwordless SSH authentication against the remotes hosts. I wrote a script that can push your public key to remote hosts in a batch. The script can be downloaded from here
Fix duplicated package ID in red hat satellite
Our red hat satellite stops to sync from the subscribed red hat channel. We turned the debug on and found out it is caused by the duplicated package ID in the self-managed oracle database. Here is how to fix it: 1) Turn on debug to find out the duplicated package ID. echo "debug=7" >> /etc/rhn/rhn.conf … Continue reading Fix duplicated package ID in red hat satellite
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