Useful for finding problems with new installations. telnet examplemailserver.com 25. Key in “EHLO examplemailserver.com” and press enter. Key in “MAIL FROM: sender@mydomain.com” and press enter. Key in “RCPT TO: recipient@examplemailserver.com” [...]

On a new CentOS 5.1 install there was a dleay while logging in via SSH. Using the -v option i.e. # ssh -v jonny@servername gave more verbose output with the [...]

Enabling some extra logging options on MySQL is useful for temporary close analysis of what is actually going on with your server and applications. Logging Slow Queries To switch on [...]

SSH tunnelling can be used to secure communications of non-secure protocols between two computers. For the purposes of this example I have a server running MySQL which I will call [...]

The Apache module mod_proxy can be used to 'reverse proxy' requests through an Apache server to another server. This is most useful when proxying requests to a server behind a [...]

Importing databases from MySQL 3.2 to MySQL 5 – When I create a database using Plesk it creates it as utf8 (Character Set) and utf8_general_ci(Collation) but when I create a [...]

We found that Apache 1.3 was periodically using up all the memory and swap space on a machine and stumbling on the post below we decided to reduce MaxRequestsPerChild from [...]

For future reference …Had a few issues related to Horde sending mail. Although it appeared as though the mails were sent there was an issue with Horde using Sendmail.One proposed [...]

Using PHP to query Active Directory resulted in a few problems e.g. Warning: ldap_search() [function.ldap-search]: Search: Can’t contact LDAP server in … ldap_search(): Search: Operations errorWarning: ldap_search() [function.ldap-search]: Search: Partial [...]

The default installation of Nagios is pretty ugly but can be tarted up with the Nuvola icons and some stylesheets from the following page:http://www.nagiosexchange.org/cgi-bin/page.cgi?g=Detailed%2F1723.html;d=1 Scroll down the page to the [...]