Archive: 2016

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How to convert VirtualBox vdi to KVM qcow2

VBoxManage can't directly convert vdi to qcow2, so there is two options : With VBoxManage convert vdi to raw and with qemu-img convert raw to qcow2 With qemu-img convert vdi to qcow2 Notes : vdi are

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How to disable SSH login for the root user

Create a new user. In the following example, we will name it bob. root# useradd -m bob root# id bob uid=1000(bob) gid=1000(bob) groupes=1000(bob) Set the password for the new user. root# passwd bo

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FreeBSD 10.3 is here

FreeBSD update to version 10.3. Main improvments: 15 security flaws patched UEFI support Gnome 3.16.2 Full Release Notes on official FreeBSD website.

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OpenBSD 5.9 is here

OpenBSD update to version 5.9. Main improvments: Pledge - a new mitigation mechanism process in restricted mode security improved 70% of user components converted WiFi 802.11n multithread network

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Examine the codes sent by the keyboard

A usefull command if are want to read keyboard input : showkey. Very useful to know keycodes when programming. What is showkey ?# showkey - examine the codes sent by the keyboard How does it work ?# s

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How to change OpenSSH port on CentOS 7

Before beginning# These are the steps to do on the SSH server. Be sure to do all the steps before exiting SSH connection if you are connected via SSH. This config was tested for default CentOS 7 iso.