Maintaining packages on Debian/Ubuntu (I)
When you have to take care of a production environment, it is normal to use distributions such as Debian, Ubuntu Server, RHEL or CentOS, because they are supported for a long time. In this way, for...
View ArticleMaintaining packages on Debian/Ubuntu (II)
Let's end up the last part of the article about Maintaining packages on Debian/Ubuntu. In the previous writing and by means of the dh_make utility, I set up the necessary structure to create the final...
View ArticleApache performance tuning: security (I)
Let's get started by remembering the series of articles published about Apache performance tuning:Apache performance tuning: dynamic modules (I and II).Apache performance tuning: directives (I and...
View ArticleClik here to view.
Cloning encrypted hard drives with Clonezilla
Clonezilla is a fantastic tool aimed at cloning hard drives and partitions, and afterwards, being able to recover them at the moment you want. It is based on several open source solutions such as...
View ArticleApache performance tuning: security (II)
This is the second part of the article Apache performance tuning: security (I).Disable DNS reverseApache has a special directive, HostnameLookups, that if it is set on, the web server will always try...
View ArticleClik here to view.
Hooking up Thunderbird to Exchange via DavMail (I)
I wanted to write down a good way to set up Thunderbird so as to fully work with Microsoft Exchange, since this is the typical situation that many people have to overcome in Windows environments. The...
View ArticleClik here to view.
Clik here to view.
Hooking up Thunderbird to Exchange via DavMail (II)
This is the second part of the article about Hooking up Thunderbird to Exchange via DavMail (I). During the first one, it was put forward how to configure DavMail so as to work as gateway between...
View ArticleClik here to view.
Hooking up Thunderbird to Exchange via DavMail (III)
Let's ending up the series of articles about Hooking up Thunderbird to Exchange via DavMail (I, II). Through this final part, I am going to configure Lightning as a calendar connected to Microsoft...
View ArticleRemote log server via HTTP (I)
When you have a network with multiple servers which can be accessed by several people, for example in order to take a look at their log files, it is desirable to centralize this task on a single...
View ArticleRemote log server via HTTP (II)
Let's keep on with the second article about setting up a Remote log server via HTTP. In the preceding part, the NFS daemon was configured in order to be able to export the local log server through NFS,...
View ArticleRemote log server via HTTP (III)
Once finished the second article about the configuration of Samba, Remote log server via HTTP (II), now the server is going to be set up in order to be able to import the log directories via NFS and...
View ArticleGPT, beyond the MBR (I)
Have you ever wondered what are the limits of the MBR (Master Boot Record)? I mean, the maximum size of a partition or a entire hard drive able to be handled. The answer is 2.2 TB.Below you can observe...
View ArticleGPT, beyond the MBR (II)
Let's follow up on the second part of the article about GPT, beyond the MBR.Now, a new GPT partition table is going to be created by means of parted, and afterwards, it will be...
View ArticleRemote log server via HTTP (IV)
Through the following text, let's end up the series of articles related to the installation and configuration of a log server via HTTP (I, II and III).Next, Apache is going to be installed and tuned...
View ArticleClik here to view.
Managing passwords with MyPasswords
From a long time, I was looking for a tool in order to handle all my passwords, and by trying out different options, I came across MyPasswords, an easy and handy application which allows you to store...
View Articlesysstat vs top vs ps (I)
I have always been using several tools to get the CPU utilization of Linux processes through different tools such as top, ps, sar, etc., but so far, I did not realise that the results obtained from...
View Articlesysstat vs top vs ps (II)
Following up on the previous article, sysstat vs top vs ps (I), a curious case that I would like to talk about is when you use more than one core. Let's create a simple script in Python which runs a...
View ArticleClik here to view.
Zabbix poller processes more than 75% busy and queue delay (I)
In my previous job, I had to set up a Zabbix infrastructure in order to monitor more than 400 devices between switches and servers. The main feature of this architecture was that there were a lot of...
View Articlesysstat vs top vs ps (III)
Let's finish the series of articles related to the differences in the measure of sysstat, top and ps.What about the system CPU time (%sy) of the first top from the previous article? It is 39.7%. It is...
View Article