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GlusterFS – Replicate a volume over two nodes

When you are using a load balancer with two or more backend nodes(web servers) you will probably need some data to be mirrored between the two nodes. A high availability solution is offered by GlusterFS. Within this article, I am going to show how you can set volume replication between two CentOS 7 servers. Let’s …

In Technology

by Andrei Grijincu on September 25, 2017

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How to install a .pxf windows ssl certificate on your linux web server

Windows uses .pfx for a PKCS #12 file. PFX stands for Personal eXhange Format. This is like a bag containing multiple cryptographic information. It can store private keys, certificate chains, certificates and root authority certificates. It is password protected to preserve the integrity of the contained data. In order to install it on our apache/nginx …

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by Andrei Grijincu on September 22, 2017

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Mysqldump Command – Useful Usage Examples

One of the tasks a sysadmin will always have on their list is backing up databases. These backups are also called dump files because, usually, they are generated with mysqldump command. I am going to share a few tricks on mysqldump that will help when handling servers with many relatively small databases.   The most …

In Blog, Technology

by Andrei Grijincu on August 3, 2017

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How to save a file in Vim after forgetting to use sudo

Many of you probably experienced this. You edit a file in Linux with Vim or Nano or whatever else text editor you might be usingĀ and when you try to save, you realise you forgot to launch the editor with sudo privileges, and file can’t be written. Exiting without saving and editing again with sudo privileges …