August 2014
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Adding Multiple SMTP servers : Customizing selector on OpenDKIM

Recently one of my friends is setting up mutliple outbound SMTP servers for his project. But He does not have enough domain access and his primary domain is already being using another DKIM Keys (default._domainkey) for business email purpose.

His challenge is to seup another trusted outbound email server without affecting the primary Email configuration.


NRPE : krb5.h:2690:24: error: et/com_err.h: No such file or directory

While I’m installing nrpe (Nagios Client) on a server I got a strange error as shown below, I’m using CentOS 6.4 (64 bit) linux.

/usr/include/krb5/krb5.h:2690:24: error: et/com_err.h: No such file or directory In file included from /usr/include/krb5.h:7,                  from /usr/include/openssl/kssl.h:72,                 […]

MySQL : How do I store Slow sql queries in to a Table

One of the Dev. find difficulties to populate the large slow queries file which he ask to fix the Application performance issue. After few checking he informed me we can log slow queries on one the system table in MySQL version 5.5. So that we can pragmatically manipulate and explore it easily.

But I do […]

How do I create swap partition in Linux : mkswap Operation not permitted

One of my old friend is been used a Godaddy VPS for a long time and he is facing issue issue with MySQL over load due to poor RAM resource. After few attempts, I have convinced that I could not able to create swap partition or swap file to enable additional swap to this system. […]