How to renew the ISPConfig 3 SSL Certificate

This tutorial describes the steps to renew the SSL Certificate of the ISPConfig 3 control panel. There are two alternative ways to achieve that:

  1. Create a new OpenSSL Certificate and CSR on the command line with OpenSSL.
  2. Renew the SSL Certificate with the ISPConfig updater

I'll start with the manual way to renew the ssl cert.

1) Create a new ISPConfig 3 SSL Certificate with OpenSSL

Login to your server on the shell as root user. Before we create a new SSL Cert, backup the current ones. SSL Certs are security sensitive so I'll store the backup in the /root/ folder.

tar pcfz /root/ispconfig_ssl_backup.tar.gz /usr/local/ispconfig/interface/ssl
chmod 600 /root/ispconfig_ssl_backup.tar.gz

Now create a new SSL Certificate key, Certificate Request (csr) and a self signed Certificate.

openssl genrsa -des3 -out ispserver.key 4096
openssl req -new -key ispserver.key -out ispserver.csr
openssl x509 -req -days 3650 -in ispserver.csr \
-signkey ispserver.key -out ispserver.crt
openssl rsa -in ispserver.key -out ispserver.key.insecure
mv ispserver.key
mv ispserver.key.insecure ispserver.key

Restart Apache to load the new SSL Certificate.

service apache2 restart

2) Renew the SSL Certificate with the ISPConfig installer

The alternative way to get a new SSL Certificate is to use the ISPConfig update script.

Download ISPConfig to the /tmp folder, unpack the archive and start the update script.

cd /tmp
tar xvfz ISPConfig-3-stable.tar.gz
cd ispconfig3_install/install
php -q update.php

The update script will ask the following question during update:

Create new ISPConfig SSL certificate (yes,no) [no]:

Answer "yes" here and the SSL Certificate creation dialog will start.

How to uninstall Windows 10?

Get ready for the turnaround

You’ve been a proud owner of the latest Windows 10 for more than a week now, but soon enough you found that the new operating system’s just not effective that much for you? The reason could be anything like a mission critical program doesn’t work right, or you hate the new Start menu, or maybe Cortana is giving you the skulk. Continue reading How to uninstall Windows 10?

How to install FFmpeg on Ubuntu 14.04

FFmpeg has been removed from Ubuntu 14.04 and was replaced by Libav. This decision has been reversed so that FFmpeg is available now in Ubuntu 15.04 again, but there is still no official package for 14.04. In this tutorial, I will show you how to install FFmpeg from mc3man ppa. Add the mc3man ppa:

sudo add-apt-repository ppa:mc3man/trusty-media

And confirm the following message by pressing <enter>:

Also note that with apt-get a sudo apt-get dist-upgrade is needed for initial setup & with some package upgrades
More info:
Press [ENTER] to continue or ctrl-c to cancel adding it

Update the package list.

sudo apt-get update
sudo apt-get dist-upgrade

Now FFmpeg is available to be installed with apt:

sudo apt-get install ffmpeg

Disable IPv6 networking on CentOS

Follow these steps to disable IPv6 on CentOS. Edit the /etc/sysctl.conf file, I will use the nano editor here:

nano /etc/sysctl.conf

And add the following line at the end of the file:

net.ipv6.conf.all.disable_ipv6 = 1

Then run:

sysctl -p

to load the new settings.

The next step is to edit the network card configuration file (/etc/sysconfig/network-scripts/ifcfg-eth*) and add or edit the setting IPV6INIT so that it is set to "no".


Now edit the file /etc/sysconfig/network:

nano /etc/sysconfig/network

And set the NETWORKING_IPV6 option to "no":


Then restart the server.

Windows 10: What is the $WINDOWS.~BT folder used for?

This folder is used by the Windows 10 Updater, it contains update logs and files downloaded by the Windows update process.

How to delete the $WINDOWS.~BT folder?

The folder can be deleted e.g. when an upgrade from windows 7 / 8 to Windows 10 failed and you want to free up space on the hard disk. This folder is protected, you can't remove it with the Windows Explorer. Use these steps:

Open a terminal Window in administrator mode and run the command


Source: Microsoft Answers

How to disable the “Get Windows 10” icon in the notification area?

The “Get Windows 10” icon in the tray has been installed as part of the KB3035583 Windows update.

To remove that icon permanently uninstall this update in the windows software center. The Windows update function might offer this update again in future, so don't forget to hide it in Windows update so that it does not come back.

If you still see the icon after uninstalling and a reboot, then check if there are still files of the update in C:\Windows\System32\GWX. If that's the case, delete this directory.