Setting up Transport Layer Security (TLS), or as previously known as Secure Sockets Layer (SSL), for Apache, Postfix and IMAP like Dovecot is fairly easy. You just need some digital certificates and configuration. If you don’t want to pay for certificates from trusted sources like Thawte or you just don’t need that kind of trust (for development purposes), you can always produce your own certificates.… Continue reading
CentOS is great substitute for Red Hat Enterprise Linux but is missing some useful packages like Apache Tomcat 6. Installing Apache Tomcat 6 on CentOS 5 from gzip-package is fairly easy. The following guide is at least for CentOS 5.4.
Pre-Requirements
First you need to install Sun JDK and you can follow the instructions given in Installing Sun JDK 1.6 on CentOS
After Java is on place it’s time to get ready for Tomcat.… Continue reading
CentOS doesn’t have a package for Sun JDK so it has to installed manually. It’s fairly easy but there are some steps to do that. This guide has been tested on CentOS 5.4 x64_86.
Step 1. Initial setup for building RPM
-!- Do this with a non-root user
$ vim ~/.rpmmacros %_topdir /home//rpmbuild %_tmppath %{_topdir}/tmp
$ mkdir -p ~/rpmbuild/{SOURCES,SRPMS,SPECS,RPMS,tmp,BUILD}
Apache Tomcat likes with default settings to listen to requests on 8080 and 8443 ports but it is more enjoyable to use the more common 80 and 443 ports for HTTP and HTTPS traffic. This way the user don’t have to put those pesky port numbers after the address. Of course you could just tell Tomcat to listen to those ports but it has some negative sides: hassle with the startup and running Tomcat as root.… Continue reading
A simple tip for keeping up with the time in Xen when your domU isn’t syncing the clock frequently enough and your clock is whatever. Of course you can sync your clock with ntpdate but first you need to set the domain (domU) to run its wallclock independently from Xen.
Simply say in the command line of domU:
echo 1 > /proc/sys/xen/independent_wallclock
Or if you have noclobber on:
echo 1 >!… Continue reading