Zimbra 8 on Ubuntu 14 with DKIM activation

Step 1 – connect to your server, get root privileges and install this package.

apt-get install libgmp10 libperl5.18 unzip pax sysstat sqlite3 dnsmasq wget

Configure hostname and DNS Server
In this tutorial will use the ‘dnsmasq’ resolving nameserver to speedup DNS lookups in Zimbra. Dnsmask has been installed as prerequisite in the first chapter, so we just have to configure it now:

Step 1 – Edit hostname and hosts Continue reading “Zimbra 8 on Ubuntu 14 with DKIM activation” »


Outlook settings for vestacp

Properly set up a Mail Client in Vesta Control Panel

  • You can use Thunderbird, Apple Mail, Outlook or Outlook Express
  • Use full e-mail address as username
  • IMAP and SMTP STARTTLS with normal passwords

Example Settings:

Username: william.cage@alpha-mimic.ltd
password: aXly8Kbiqo

IMAP hostname: alpha-mimic.ltd
IMAP port: 143
IMAP auth method: Normal password
SMTP hostname: alpha-mimic.ltd
SMTP port: 587
SMTP auth method: Normal password

Congratulations, you now have all set up!


Upgrade mysql 5.5 to 5.6 in Ubuntu 14

While I was installing idoit- the cmdb and IT documenting platform, struggling with a pre-requisite of having mysql version 5.6 which is not shipped by native in ubuntu 14 installations. So had to google it and found some solution, however the one that worked for me which I’m sharing below:

step 1 : remove old mysql

sudo apt-get remove mysql-server
sudo apt-get autoremove

step 2 : install new version of mysql

sudo apt-get install mysql-client-5.6 mysql-client-core-5.6
sudo apt-get install mysql-server-5.6

Essential Openvz commands

1. Command to list the running VPSs in a node

# vzlist


# vzlist
 106 104 running xx.xx.xx.xx server1.test.com 
 107 46 running xx.xx.xx.xx server2.test.com 
 108 83 running xx.xx.xx.xx server3.test.com
 109 86 running xx.xx.xx.xx server4.test.com

2. This command lists all (running and stopped) the VPSs in a node.

# vzlist -a


# vzlist -a
 106 104 running xx.xx.xx.xx server1.test1.com 
 107 46 running xx.xx.xx.xx server2.test2.com 
 108 83 running xx.xx.xx.xx server3.test3.com
 109 86 running xx.xx.xx.xx server4.test4.com
 110 - stopped xx.xx.xx.xx server5.test5.com

Continue reading “Essential Openvz commands” »


ZOHO Mail Client Configuration

Zoho Mail can be accessed via POP/ IMAP from the standard email clients. The administrator can enable or disable the access via POP/ IMAP for the user accounts based on the organizations requirements. The POP/ IMAP configuaration details are given below:

Incoming Server Name : imappro.zoho.com
Port : 993
Require SSL : Yes
Username : you@yourdomain.com

Incoming Server Name : poppro.zoho.com
Port : 995
Require SSL : Yes
Username : you@yourdomain.com

Outgoing / SMTP
Outgoing Server Name: smtp.zoho.com
Port : 465 with SSL or 587 with TLS
Require Authentication: Yes


Creating Nginx Virtual Hosts

Step One— Create a New Directory

The first step in creating a virtual host is to a create a directory where we will keep the new website’s information. This location will be your Document Root in the nginx virtual configuration file later on. By adding a -p to the line of code, the command automatically generates all the parents for the new directory.

sudo mkdir -p /var/www/example.com/public_html

You will need to designate an actual DNS approved domain, or an IP address, to test that a virtual host is working. In this tutorial we will use example.com as a placeholder for a correct domain name.

However, should you want to use an unapproved domain name to test the process you will find information on how to make it work on your local computer in Step Six.

Step Two—Grant Permissions

We need to grant ownership of the directory to the right user, instead of just keeping it on the root system. You can replace the “www-data” below with the appropriate username.

sudo chown -R www-data:www-data /var/www/example.com/public_html

Additionally, it is important to make sure that everyone is able to read our new files.

sudo chmod 755 /var/www

Now you are all done with permissions. Continue reading “Creating Nginx Virtual Hosts” »


Tuning Nginx for Maximum Performance


Make sure you use the correct amount of worker_processes in your /etc/nginx/nginx.conf. This should be equal to the amount of CPU cores in the output of

cat /proc/cpuinfo | grep processor
root@server1:~# cat /proc/cpuinfo | grep processor
processor : 0
processor : 1
processor : 2
processor : 3
processor : 4
processor : 5
processor : 6
processor : 7

In this example, we have eight CPU cores, so we set

vi /etc/nginx/nginx.conf

worker_processes 8;

Keepalive_timeout, sendfile, tcp_nopush, tcp_nodelay

Continue reading “Tuning Nginx for Maximum Performance” »


Configure DHCP Server Step-by-Step config Guide Using Webmin

Dynamic Host Configuration Protocol (DHCP) is a client/server protocol that automatically provides an Internet Protocol (IP) host with its IP address and other related configuration information such as the subnet mask and default gateway.

In our previous article, you have setup your DNS Server using Webmin, refer below link for more information.

In this article We will seen how to configure DHCP Server Using Webmin(web-based interface). Webmin tool offer to new system administrators to perform all system management task from via a web browser, Instead of using the command line console or terminal. You can also manage a system from the console or remotely. Continue reading “Configure DHCP Server Step-by-Step config Guide Using Webmin” »


Install PSiTransfer on Debian 8 A Simple Open Source Self-hosted File Sharing Solution

PSiTransfer, which is a simple and open source file sharing utility. Using PSiTransfer, we can either share our files locally or globally. Unlike transfer.sh, it is not a website. It is actually a self-hosted file sharing platform. You can deploy it on home system to share files over local area network. Or, you can deploy it on a VPS or Cloud, so that you can access or share your files from anywhere, using any Internet-enabled device. Since, it comes with built-in web server, you don’t need to deploy any other extra software. All you need is a web browser to access or share your stuffs. Continue reading “Install PSiTransfer on Debian 8 A Simple Open Source Self-hosted File Sharing Solution” »