Managing big networks can become an issue if you don’t use the right tools. DHCP (Dynamic Host Configuration Protocol) appears in early 1993 and was defined in RFC 1531. This protocol was created to reduce system administration workload, allowing administrators to add new devices in a IPV4 network easy as possible (in some cases no intervention required). Dynamic Host Configuration Protocol is used by DHCP clients to automatically obtain the necessaryly information (network parameters assigment) to connect to a IPV4 network. Also DHCP was extended for IPV6 protocol in …

Ext4 is the normal evolution of the most used Linux filesystem: Ext3. The evolution of Ext3 from Ext2 had add just 1 new important feature: journalization. But ext4 is a result of hardly improved Ext3 and is coming with better performance, modified data structures, reliability and new features like bigger filesystem/file sizes, subdirectory scalability, extents, multiblock allocation, delayed allocation, journal checksumming, online defragmentation, persistent preallocation.

Share this post

Hide Bookmarks

Today we will talk about shell error handling. Almost weekly I’m writing new shell scripts for me or my customers and in this time I learned something very valuable: writing scripts without error handling is like running windows, expect at unexpected. Let’s take the following example:

Share this post

Hide Bookmarks

Monitoring is one of the most vital part of all online business right now. A server what fail to deliver its content to a client it’s a big problem, because of this server disruptive service or downtime is our the worst enemies. Some downtimes are impossible to be predicted and monitoring your system is the best thing you can do. Did you ever asked yourself what means 99% availability? 7 hours per month of downtime. 7 hours for a client can be very frustrating.

Share this post

…

We will not discuss who is better or who is not, we just try to provide you a simple how-to to migrate from MySQL to Postgres or from Postgres to Mysql. On internet are several documents about that, but I will try to add new fresh informations from my experience with that. The differences between this Postgres and MySQL are starting from the concept of this two platforms. For example Postgres follow more closer the ANSI SQL standard than MySQL, the method of administration is totally different between them, Mysql …