Customizing Jitsi Meet

Edit Logo Image:

In your jitsi-meet deployment, probably in /usr/share/jitsi-meet/images the image file will exist that you can override with your own.

Update Link on Logo:

You can edit:
Path: /usr/share/jitsi-meet
File: interface_config.js

Change texts of Welcome/Home Page: Continue reading “Customizing Jitsi Meet” »


Build a Public NTP Server

Install NTPd and Configure NTP server for time adjustment.

[root@dlp ~]# yum -y install ntp
[root@dlp ~]# vi /etc/ntp.conf
# line 18: add the network range you allow to receive requests publicly
restrict mask nomodify notrap

# change servers for synchronization

#server iburst
#server iburst
#server iburst
#server iburst
server iburst
server iburst
[root@dlp ~]# systemctl start ntpd
[root@dlp ~]# systemctl enable ntpd

If Firewalld is running, allow NTP service. NTP uses 123/UDP. Continue reading “Build a Public NTP Server” »


Large Database Import Progress Using PV

PV can report progress for large data imports. In this example I will use a large (7 G) install on Ubuntu. First, download PV (

sudo apt-get install pv

A traditional mysql import may be formatted as:

mysql -u USER -p DATABASE_NAME < DUMP.mysql

but to leverage PV, pass the dump file ,then pipe the mysql command specifying the database with -D flag:

pv DUMP.mysql | mysql -u USER -p -D DATABASE_NAME

Your import will report progress and an ETA 🙂


Installing Manageengine Opmanager 12 standar/pro edition on Linux Centos 7

Lately for a project needed to install opmanager for a specific client. The installation is quite straight forward on a fresh installation of Centos 7 Box. Assuming you already have a linux installaiton file (ended with .bin) file. So here it goes-

Installing OpManager on Linux using Console mode / Silent mode
This is a quick walk-through of the console mode installation of OpManager on a Linux box – an easy thing to do if you are working on a Windows box and want to install on a remote Linux system.


To begin with, make sure you have downloaded the binary for Linux. (

Steps to install

Step 1: Execute the binary with administrator privileges (sudo) and -i console option.

Continue reading “Installing Manageengine Opmanager 12 standar/pro edition on Linux Centos 7” »


Let’s Encrypt for cPanel Installation


Let’s Encrypt for cPanel Installation using Installing the cPanel Plugin

Log into your SSH client at root level, then add the Let’s Encrypt repository with the following command:

cd /etc/yum.repos.d/ && wget

Next, install the plugin for cPanel with line below and yum:

yum -y install letsencrypt-cpanel

The installation process usually takes about a minute. If all goes well and the installation was successful, a test should run automatically. If it renders similar messages as the example below, you’re good to go:

le-cp self-test
[SELF-TEST] Can read config ............ SUCCESS.
[SELF-TEST] Can connect to daemon and check licence ............ SUCCESS.
[SELF-TEST] Can connect to Lets Encrypt ............ SUCCESS.
[SELF-TEST] Can talk to WHM API ............ SUCCESS.
[SELF-TEST] Can talk to plugin RPC ............ SUCCESS.

You can log in to your cPanel account and install your first SSL certificate.

Installing a Certificate
Once you’re logged into cPanel, you should see a Let’s Encrypt for cPanel button under Security. Click on it to access your active domains list to install a certificate.

Continue reading “Let’s Encrypt for cPanel Installation” »


Extend/Reduce LVM’s (Logical Volume Management) in Linux

My Server Setup – Requirements

  1. Operating System – CentOS 6.5 with LVM Installation
  2. Server IP –

How to Extend Volume Group and Reduce Logical Volume

Logical Volume Extending

Currently, we have One PV, VG and 2 LV. Let’s list them one by one using following commands.

# pvs
# vgs
# lvs

Logical Volume Extending

Logical Volume Extending

Continue reading “Extend/Reduce LVM’s (Logical Volume Management) in Linux” »


Squid as Transparent Proxy on CentOs 6.4

In this tutorial I am going to configure squid acting as transparent proxy what does it means? It means we have no part of configurations on the client end, just to setup squid in transparent proxy mode so it will sits between client and internet. And redirect their port 80 requests to 3128 port which is default squid port. Here the simple steps which you need to perform on squid server.

Lab Environment: 

  • CetnOs 6.4 (as squid transparent proxy server), Hostname =
  • eth0 : (Connected to Internet) IP =, Gateway = and DNS =
  • eth1 : (Connected to LAN) IP =, and DNS =
  • Xp Pro SP3 (Client PC for testing). Hostname = IP =, Gateway = Server’s IP) and DNS =

Step-1 Installing squid packages.

yum install squid -y

Step-2 Edit squid configuration file ‘/etc/squid/squid.conf’. Continue reading “Squid as Transparent Proxy on CentOs 6.4” »


Reset lost root password on Ubuntu 18.04 Bionic Beaver Linux

Boot Into GRUB menu

The first step is to reboot into the GRUB menu. If Ubuntu 18.04 Bionic Beaver is the only operating system installed you need to keep pressing SHIFT for the GRUB menu to show up.

Edit Grub Menu

Using arrows select the Ubuntu menu or the menu you use to boot your system and hit the e key. This will allow you to edit the menu: Continue reading “Reset lost root password on Ubuntu 18.04 Bionic Beaver Linux” »


install and Configure SAMBA in Debian Squeeze

Samba is a free software re-implementation of SMB/CIFS networking protocol, originally developed by Australian Andrew Tridgell. As of version 3, Samba provides file and print services for various Microsoft Windows clients and can integrate with a Windows Server domain, either as a Primary Domain Controller (PDC) or as a domain member. It can also be part of an Active Directory domain.Samba runs on most Unix and Unix-like systems, such as Linux, Solaris, AIX and the BSD variants, including Apple’s Mac OS X Server (which was added to the Mac OS X client in version 10.2). Samba is standard on nearly all distributions of Linux and is commonly included as a basic system service on other Unix-based operating systems as well. Samba is released under the GNU General Public License. The name Samba comes from SMB (Server Message Block), the name of the standard protocol used by the Microsoft Windows network file system.  (Wikipedia).

1-Specify  the  Samba Server

lets give my example server with IP

2- Install Samba

open  terminal and  install samba package and dependencies

$sudo apt-get install libcupsys2 samba samba-common

You will see the following questions: Continue reading “install and Configure SAMBA in Debian Squeeze” »


Change cluster node IP in Proxmox

To update the present cluster host proxmox following files need to be updated:

/etc/pve/corosync.conf (only on one node necessary)

However, corosync.conf needs special way to edit the file!

Edit corosync.conf

Editing the corosync.conf file is not always very straightforward. There are two on each cluster node, one in /etc/pve/corosync.conf and the other in /etc/corosync/corosync.conf. Editing the one in our cluster file system will propagate the changes to the local one, but not vice versa. The configuration will get updated automatically as soon as the file changes. This means changes which can be integrated in a running corosync will take effect immediately. So you should always make a copy and edit that instead, to avoid triggering some unwanted changes by an in-between safe.

cp /etc/pve/corosync.conf /etc/pve/

Then open the config file with your favorite editor, nano and vim.tiny are preinstalled on any Proxmox VE node for example. Continue reading “Change cluster node IP in Proxmox” »