"Signals and slots are used for communication between objects. The signals and slots mechanism is a central feature of Qt and probably the part that differs most from the features provided by other frameworks". I literally copied that off from the QT Signals and Slots documentation. Until recently I didn ...read more
Every installation of postgresql datbases comes with the command line tools pg_dump and pg_restore. With this two commands we have all that we need to backup and restore our databases. Of course there are also graphical tools that we can use to backup and restore.read more
Installing PostgreSQL on a Centos 6.5 is as simple as "yum install postgresql" but you're probably here because you want to install a newer version of PostgreSQL and also want more information on how to configure it. I Do not use the stock postgresql myself. I always want ...read more
Here is the step by step instructions on how to install phpPgAdmin on Centos 7. PostgreSQL is a great database and phpPgAdmin is a web-based administration tool for PostgreSQL. Probably most postgresql DBA's will use the command line or pgadmin3 but if you are like me, using postgresql in ...read more
Most linux admins stop at basic file permissions and ignore using and learning Access Control Lists. ACL's is a very powerfull extenstion to basic file permissions. For example with ACLs you can set up a file in your home directory that can be read by a limited number of ...read more
Sometimes we do not always need a puppet server and instead we can copy/install our puppet manifests or module to the local host. Using "puppet apply", applies a standalone Puppet manifest or module to to the local system. This assumes that we have puppet installed locally.read more
Most people will probably choose to use the DNS servers provided by their hosting company or their domain registrar. If however you have an internal network, there there are some advantages to creating your own DNS servers. You could configure an internal DNS server as a Caching or Forwarding server ...read more
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