Administrations

Install BigBlueButton- video conferencing

by

Installation BigBlueButton with a single command on a Ubuntu 16 OS:

If you want to set up BigBlueButton 2.2 with a TLS/SSL certificate and GreenLight, you can do this all with a single command:

wget -qO- https://ubuntu.bigbluebutton.org/bbb-install.sh | bash -s -- -v xenial-22 -s bbb.example.com -e info@example.com -g

Troubleshoot after installation:

Greenlight not running

If on first install Greenlight gives you a 500 error when accessing it, you can restart Greenlight.

Tomcat7 not running

If on the initial install you see

# Not running: tomcat7 or grails LibreOffice

Read more

Share

Install Redis on Ubuntu 18.04 & 16.04 LTS

by

Step 1 – Prerequsities

Log in to your system with sudo privilege account using shell access, to which you need to install Redis.

ssh ubuntu@remote

Update the apt-get packages index files and also update existing packages to the newest versions by using the following commands:

sudo apt-get update
sudo apt-get upgrade

Step 2 – Installing Redis

The Redis packages are available under the default apt repository. For the installation of Redis on an Ubuntu VPS. Run below command from the terminal to install Redis on your machine:

sudo apt-get install redis-server

Next is to enable Redis to start on system boot. Also restart Redis service once.

sudo systemctl enable redis-server.service

Read more

Share

Ubuntu Firewall – UFW useful commands

by

Prerequisites

To follow this tutorial, you will need one Debian 10 server with a sudo non-root user, which you can set up by following Steps 1-3 in the Initial Server Setup with Debian 10 tutorial.

Step 1 – Installing UFW

Debian does not install UFW by default. If you followed the entire Initial Server Setup tutorial, you will have installed and enabled UFW. If not, install it now using apt:

sudo apt install ufw

We will set up UFW and enable it in the following steps.

Step 2 — Using IPv6 with UFW (Optional)

This tutorial is written with IPv4 in mind, but will work for IPv6 as long as you enable it. If your Debian server has IPv6 enabled, you will want to ensure that UFW is configured to support IPv6; this will ensure that UFW will manage firewall rules for IPv6 in addition to IPv4. To configure this, open the UFW configuration file /etc/default/ufw with nano or your favorite editor:

sudo nano /etc/default/ufw

Then make sure the value of IPV6 is yes. It should look like this:

/etc/default/ufw excerpt
IPV6=yes

Read more

Share

How To Install MySQL on Debian 9 (Stretch) with version selection

by

Step 1 – Prerequisites

Login to your Debian 9 system using shell access. For remote systems connect with SSH. Windows users can use Putty or other alternatives applications for SSH connection.

ssh root@debian9

Run below commands to upgrade the current packages to the latest version.

sudo apt update 
sudo apt upgrade

Step 2 – Configure MySQL PPA

MySQL team provides official MySQL PPA for Debian Linux. You can download and install the package on your Debian system, which will add PPA file to your system. Run below command to enable PPA.

wget http://repo.mysql.com/mysql-apt-config_0.8.13-1_all.deb
sudo dpkg -i mysql-apt-config_0.8.13-1_all.deb

During the installation of MySQL apt config package, It will prompt to select MySQL version to install. Select the MySQL 5.7 or 5.6 option to install on your system.

Read more

Share

Apache HTTP to HTTPS htaccess redirect on CWP – Centos WebPanel

by

Using Apache as main server (only) :
Rewrite rule as follows, this need to be added in your sites .htaccess :

RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

Forcing non www to www and https :

RewriteEngine On
RewriteCond %{HTTPS} off [OR]
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteCond %{HTTP_HOST} ^(?:www\.)?(.+)$ [NC]
RewriteRule ^ https://www.%1%{REQUEST_URI} [L,NE,R=301]

Read more

Share

Java plug-in does not work in Firefox after installing Java

by

Tested on Firefox 42 (old release) and Sea-Monkey 2.46/2.49.

There are several workaround options. The simplest method is noted first and is recommended. The remaining available options are not recommended for non-technical users.

Option 1: Add property name dom.ipc.plugins.java.enabled in Firefox preferences

1. Launch Firefox
2. Type about:config in the address bar
3. You will be presented with a Firefox warning about the configuration settings. After acknowledging the Firefox alert, you should see a listing of the configuration preferences.
4. Right-click anywhere inside the displayed list of preferences. Select New then select Boolean.
5. Add property name as dom.ipc.plugins.java.enabled
6. Add Preference name as dom.ipc.plugins.java.enabled.
7. A window will be displayed, select false. Then select OK. 

Read more

Share

Wget Command Examples

by

How to Download a File with Wget

In it’s simplest form when used without any option, wget will download the resource specified in the [url] to the current directory.

In the following example we are downloading the Linux kernel tar archive:

wget https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.17.2.tar.xz

As you can see from the image above, Wget starts by resolving the IP address of the domain, then connects to the remote server and starts the transfer.

During the download, Wget shows the progress bar alongside with the file name, file size, download speed, and the estimated time to complete the download. Once the download is complete, you can find the downloaded file in your current working directory.

Read more

Share

Install Iptables on CentOS 7

by

Disable FirewallD

To disable the FirewallD on your CentOS 7 system, follow these steps: Type the following command to stop the FirewallD service:

sudo systemctl stop firewalld

Disable the FirewallD service to start automatically on system boot:

sudo systemctl disable firewalld

Mask the FirewallD service to prevent it from being started by another services:

sudo systemctl mask --now firewalld

Install and Enable Iptables

Perform the following steps to install Iptables on a CentOS 7 system:

Run the following command to install the iptables-service package from the CentOS repositories:

Read more

Share