Modified Thursday 13-11 07:23

The for statement in bash forloop statements of Bash With a file. Locate returns a list of file in one line separated by a space. This code use then the loop By default, for is not a real command, so you can set IFS at the head. Example: ...

Modified Monday 03-11 02:59

XPath is a pattern expression used to select a set of XML nodes. You can select: from node name from attributes from text In the XPath specification, the document model defines seven kinds of nodes. See This is a pipeline syntax that should...

Modified Tuesday 28-10 04:24

APT is a package manager that handles installation and removal of software on Debian and other Linux distributions. with Debian's .deb packages RPM Package Manager system via APT-RPM. It can: fetch packages from remote locations build a dependency...

Modified Friday 17-10 07:27

This page explains you the difference between: a library and a framework Basically, you need to look at the inversion of control principle: your code invoke the library (the library plug into your code) your code is invoked by the framework...

Modified Wednesday 15-10 07:19

Metrics collector query and collects metrics in order to be able to send them to a metrics server Log Collector In a instrumented application, reporter are a client piece of code which: process its internal registry's metrics periodically ...

Modified Sunday 17-08 08:56

With schema-later data (as semi-structured data), we apply a schema after we read the data. The knowledge of the schema is delegated to the code that reads the data. Structured data is data organized into aschemschemrelational modetexFree-form eventAnalytics...

Modified Friday 15-08 08:31

Color in a terminal are managed through a sequence of characters called an escape sequence that is added to your text as suffix (before) and interpreted by the terminal as command. Characters that needs to be rendered as black character on a white...

Created Wednesday 05-03 01:45

A Mail eXchange (MX) is a smtp server that is responsible for : receiving emails for one or more domain and delivering them to a mail delivery agent (MDA) for final delivery The email servers IP are set in the DNS via the MX record. This is how...

Created Monday 03-02 00:22

To evaluate means to: transform an expression into a value according to the language rules

Created Monday 03-02 09:04

The X.509 Public Key Infrastructure is a Public key infrastructure (PKI) that uses a hierarchical system of Certificate authorities that brings trust to the transactions by signing certificate. A Hierarchical PKI consists of: A certificate authority...

Created Friday 01-11 01:48

Corutils is a package of essential executable command line client (used greatly in shell script) See also Utils Linux Name Description arch Print machine hardware name. b2sum Print or check BLAKE2 digests....

Created Friday 11-10 08:38

NeoVIM is the latest VI editors in the series that enhanced VIM Installation Once installed the NeoVim editor is called via the nvim executable.

Created Friday 30-08 10:11

An Action Plugin is a type of module that: set up some values on the controller, (ie create a start state) then invoke an other module on the managed node that does something with these values.

Created Friday 30-08 10:11

Adhoc command are command executed as in the shell via ansible. You can therefore execute command on a whole cluster of server. This is because the default module of the ansible command line is command We define the servers in a ini inventory...

Created Friday 30-08 10:11

You may get this problem when one of your file that defines ansible property has no content (ie is empty)