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configure spam expert in cPanel/WHM IP-based Authentication

Posted in Whm/Cpanel on Nov 04, 2018

Navigate to "Exim Configuration Editor" in WHM.

Choose "Advanced Editor". Add the following in "Section: POSTMAILCOUNT" (chaning SMARTHOST to your SMTP hostname)

smarthost_dkim:
driver = manualroute
domains = !+local_domains
require_files = "+/var/cpanel/domain_keys/private/${sender_address_domain}"
# Exclude null sender messages from relaying via the smarthost
condition = ${if or {{!eq{$sender_address}{}} {!eq{$sender_host_address}{}}}} 
transport = remote_smtp_smart_dkim
route_list = $domain SMARTHOST::587

smarthost_regular:
driver = manualroute
domains = !+local_domains
# Exclude null se...

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How to Set or Change Hostname in CentOS 7

Posted in Linux Servers on Oct 31, 2018



to change or set a CentOS 7 machine hostname, use the hostnamectl

hostnamectl set-hostname your-new-hostname

hostname command you can also use hostnamectl command to display a Linux machine hostname

hostnamectl

New hostname, a system reboot is required, issue one of the below commands in order to reboot a CentOS 7 machine

init 6
systemctl reboot
shutdown -r

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How to extend the volume size on ec2 instance aws

Posted in Amazon Cloud Services, Linux Servers on Oct 30, 2018



1. Confirm the kernel.

   # uname -r

2.6.32-431.29.2.el6.x86_64

2. Confirm the initial allocated size

   # df -h

   Filesystem Size Used Avail Use% Mounted on

   /dev/xvda1 7.9G 797M 6.7G 11% /

   tmpfs 498M 0 498M 0% /dev/shm

   # lsblk

   NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT xvda 202:0 0 15G 0 disk └─xvda1 202:1 0 8G 0 part /

3. Install EPEL6 Repo

   # wget http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
   # rpm -ivh epel-release-6-8.noarch.rpm

4. Install the dracut & cloud-utils growpart modules-growroot

   # yum install -y dracut-modules-growroot cloud-utils-growpart

5. The initrd need...

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Check Apache concurrent Connections using Netstat command

Posted in Linux Servers on Oct 12, 2018

When your server is hitting high & overload, you might want to check, how many active connections are there and which IP take maximum of hit/connection from apache.

To Count Apache concurrent connection's, use any of the below commands.

netstat -nt | grep :80 | wc -l

netstat -plan|grep :80 | wc -l

netstat -an | grep 'EST' | wc -l

netstat -ant | grep ESTABLISHED | grep :80 | wc -l

ps -A | grep httpd | wc -l

ps -ef | grep http | wc -l

ps aux | grep httpd | wc -l

ps aux | grep http | grep -v "\(root\|grep\)" | wc -l

To print the active Internet connections to the server at port 80 and sor...[Read more...]

How to sync the data from one server to another server via ssh

Posted in Linux Servers on Oct 12, 2018



Sync the data from one server to another server using rsync on linux server.

Rsync is one of common ways to copy files and folders between two servers, whether the servers are local or remote.

Login to the server via ssh OR putty Gen windows application.

ssh root@oldserverIP 

rsync -ravP /home/user/file_name root@xx.xx.xx.xx:/home/user/d

Here first refers the source path from where you are syncing the file

and xx.xx.xx.xx refers destination server IP and the destination path where you would like to save the data.

Please check the following usefull rsync variables :

-v : Verbose

-a : archiv...

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How to change the hostname of your linux virtual nodes india

Posted in Linux Servers on Oct 11, 2018

Change Virtual Compute Nodes Hostname

Please follow the below steps to change the hostname of your Virtual Compute Node.

Login to your Virtual Compute Node as a root user.

To check the current hostname of your server, run the command

hostname

To change the hostname of your server, type new name followed by hostname

hostname new-name

Change the hostname under the path /etc/sysconfig/network

vi /etc/sysconfig/network

Edit the content of the file so that it looks like this

HOSTNAME=new-name

Ubuntu/Debian

Next, edit the /etc/hostname file and update hostname:

vi /etc/hostname

Edit the /etc/hosts f...[Read more...]

How to Fix client intended to send too large body

Posted in Linux Servers on Aug 24, 2018

First you need to edit the /etc/nginx/nginx.conf file by typing the vi command:

$ sudo vi /etc/nginx/nginx.conf

In http (server/location) section add the following directive to set the

maximum allowed size in 10MB:

client_max_body_size 10M;

Save and close the file.

Test nginx configuration for error

Run the following command:

$ sudo nginx -t

Sample outputs:

nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

If no error means, restart the nginx web server.

$ sudo systemctl reload nginx

OR

$ sudo service nginx re...

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How to change the location for virtual hosts in Plesk for Windows Server

Posted in Plesk Control Panel on Aug 16, 2018



Connect to a Plesk server via RDP.

Launch Plesk Reconfigurator at Windows Start > All Programs > Plesk.

In Plesk Reconfigurator, select Change Virtual Hosts location.



Specify the new location for virtual hosts and click Next. All existing virtual hosts data will be transferred to the new location as well.



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How to change the mailaccount location in Plesk for Windows Server

Posted in Plesk Control Panel on Aug 14, 2018



Connect to a Plesk server via RDP.

Launch Plesk Reconfigurator at Windows Start > All Programs > Plesk.

In Plesk Reconfigurator, select Change Plesk Mail Data location.



Specify the new location for Plesk mail data and click Next. All existing mail data will be transferred to the new location as well.



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How to change the location for backup files in Plesk for Windows Server

Posted in Plesk Control Panel on Aug 08, 2018



Connect to the Plesk server via RDP.

Launch Plesk Reconfigurator at Windows Start > All Programs > Plesk.

In Plesk Reconfigurator, select Change Plesk Backup Data location.



Specify the new location for backup files and click Next. All existing backup data will be transferred to the new location as well. During this operation Plesk will be stopped.



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