PostgreSQL is a great advanced open source database. It offers many features, one of them being database replication. PostgreSQL 9.4 offers many different solutions to the replication problems, each one of them having it’s number of up’s and down’s. In the end it is up to the system or database administrator to decide which solution […]
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A couple days ago i received an alert that one of the disks on our linux production machines is filling up very quickly. It was the application server machine and the logging partition was running out of space rapidly. Logs filled up my disk How logs filled up my disk Gladly the log files are […]
I really like to do work on my Linux systems as “root”, to get things done quickly and without any hassle. Yeah i know, bombs away, it is not OK or safe or whatever to use “root” user for everyday things but mainly it is not OK from the auditing point of view. Customers really dislike it […]
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SCSI stands for Small Computer System Interface and is a set of standards for transferring data and connecting devices and computers. Sometimes you make changes to disk devices on your Linux box while online which is even more often nowadays using virtual machines. Sometimes you also add a new disk and do not want to […]
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I am running a Postfix with Dovecot for my emails and also make email accounts for my friends from time to time. So last night a friend of mine asked me to configure an email account for him and forward the emails to his gmail account. It is really easy and quick to Configure Postfix […]
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YUM Repositories are warehouses of RPM package files. RPM file is a Red Hat Package Manager file and enables quick and easy software installation on Red Hat/CentOS Linux distributions. YUM Repositories hold a number of RPM package files and enable your server to download and new software. YUM Repositories can hold RPM package files locally […]
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Configuring Password Policy on CentOS 6 About Password Policy Password policy is a set of rules that must to be satisfied when setting a password. Password policy is an important factor in computer security, specially since user passwords are too often the main reason for computer system security breaches. This is why most companies and […]
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Last time i experienced problems with Zenoss. Zenoss suddenly stopped getting information from the clients, stopped graphing client data and i did not know what the reason was for this situation. I tried removing and readding the client but the job of adding a new client was even not processed. When i tried to re-model […]
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It just so happens, that sometimes you would like to add Windows client to Zenoss monitoring 🙂 . A person would think that this would be quite simple and similar to adding Linux client to Zenoss monitoring, but it is not. The SNMP Windows client Zenoss monitoring is very limited, in fact i could not […]
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I have been getting some questions and emails about problems with adding linux client to Zenoss monitoring as explained in my post on Install Zenoss Monitoring Server on CentOS 6. I decided to post the SNMP daemon configuration i use, to add linux client to Zenoss monitoring server and write in general how to get […]
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The Apache Server Status module is an addition to Apache HTTP Server. It is a module that enables insights into the Apache HTTP Server performance and statistics. On CentOS Linux, Apache Status module is provided by the httpd RPM package, so if you are running Apache, this module is already installed and wait for it […]
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Cron is a daemon on linux and unix based operating systems. Cron is a job scheduler which we can be used to configure jobs or run commands at a specific time in a day, month or year. Cron is quite configurable enabling us to run jobs and commands periodically, at fixed times or dates and also […]
