SysAdmin

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OpenVPN server | How to redirect traffic

OpenVPN server | How to redirect traffic

This post explains how to redirect all traffic of your client VPN. (more…)

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Easy-RSA v3 OpenVPN

This post explain how to generate self signed certificat using Easy-RSA v3. (more…)

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ldconfig -- Add shared libraries to linux

ldconfig — Add shared libraries to linux

This post will be very short. Its aim is reminding me how to add shared libraries to linux so they can be used by the environment. The need came from when I have finished installing IBM datastage, the DB2 connection failed because of the libraries are not found. So I needed to add them to environment… I know it can be strange…

Maybe you can find this post interesting for another purpose.

My…

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iptables — Basics

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How to install pfSense

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[ pfSense ] How to configure network interface

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10 billets !

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This is a short post that propose an easy way to find out which processes are swapping in linux. Actually I will not explain any thing :p .  I will only give you a script that give these precious information.

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In this post I am going to talk about how to manage linux user accounts. Each running process on the system is running by a user account and each file is owned by a user. If a particular running process of a user account (let’s call him X) need to have access to a file, this file need to be owned by X. If not the running process wont be able to have access to that file. To make the permission management more easy, there are groups. User account belongs to group.

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In this post I am going to talk about Network file-sharing services. Sometimes for some reasons, when you need to share file without using an external hard drive,  you will think of sharing these file through your network. To do so, you will need first to setup a file-sharing server, and then connect a client to this server. This post only deals with the configuration of client part. We will see how to connect client to an Network File System (NFS) and Common Internet File System (CIFS) server. The configuration of server will be explained in another post. Then I will show you something pretty cool icon wink Accessing network file sharing services (NFS and CIFS) . Which is auto mount (not talking about fstab!!)

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In this post I am going to explain how to configure an Logical Volume Manager (LVM) on a Red Hat based system (Red Hat, Fedora, CentOS).

With LVM, we can configure logical volume (or partition) that can be resized. It means that you can extend or reduce the logical volume size without loosing data!

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In this post I am going to talk about partitioning and file system post OS installation on a Red Hat based system. Basically in the first part of this post, I am going to explain how to create / remove partitions and how to format them with specific file system. In a second part, I am going to explain how to secure a partition with encryption. Finally, I am going to explain how to create and enable/disable a swap partition.

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In this post I am going to talk about network configuration in Red Hat Linux based system (Red Hat, Fedora, CentOS). Unlike Debian systems in which the network configuration of all interfaces is only in /etc/network/interfaces, in Red Hat system each interface has it own file.

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In this Redhat section of forbidden-access.org I am going to present some HowTos related to Redhat certifications. I do not pretend to be a Redhat instructor, and I will base myself on what I understood, not on the official course materials.

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In this post I am going to explain how to configure Vyatta firewall. But let’s see what Firewall is before talking about Vyatta firewall. A firewall is a software that controls traffic (incoming/outgoing) and determines if this traffic should be allowed or not. To do so, the firewall uses a set of rules that has been created by the network administrator. This set of rules represent the security policies.

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In this post I am going to explain how to install PowerDNS as supermaster with one slave. Then I am going to explain how to install a REST-like API.

PowerDNS is high performance authorative-only nameserver. It 100% OpenSource and work with almost any database !!

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In this post I am going to talk about how to configure the Vyatta NAT. But before what exactly is a NAT, and why do we need it…?