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 setup automysql backup/dump scripts for regular backups

Posted in Linux Servers on Jul 30, 2018

First download it via following link :-

root@cloudtechtiq.com:~$ wget http://ncu.dl.sourceforge.net/project/automysqlbackup/AutoMySQLBackup/AutoMySQLBackup%20VER%203.0/automysqlbackup-v3.0_rc6.tar.gz

Create a directory in /root named as automysqlbackup and Unzip file :-

root@cloudtechtiq.com:~$ tar zxvf automysqlbackup-v3.0_rc6.tar.gz /root/automysqlback

After unzip install that file :-

root@cloudtechtiq.comk:~$ sh install.sh

-> Press enter

-> Press enter

then open:- /etc/automysqlbackup/automysqlbackup.conf

root@cloudtechtiq.com:~$ vim /etc/automysqlbackup/automysqlbackup.conf

make followin...[Read more...]

How to create MySql db and username via CLI

Posted in Linux Servers on Jun 23, 2018

Login to mysql

mysql -u <username> -p

Creating a database

create database database_name;

put database name at the place of database_name.

Creating a user

create user 'username'@'localhost' IDENTIFIED BY 'passwordhere';

Grant privileges to user on database

grant all privileges ON database_name .* TO 'username'@'localhost';

TO grant on all databases need to issue below query

grant all privileges ON *.* TO 'username'@'localhost';

The asterisks(*) in above query is representing all database(first asterisks) and all tables of that databases(second asterisks).

Grant privileges with remote access

gr...

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How to Install Nginx on CentOS 7

Posted in Linux Servers on Apr 17, 2018

NGINX (short for Engine X) is a free, open-source and powerful HTTP web server and reverse proxy with an event-driven (asynchronous) architecture. It is written using C programming language and runs on Unix-like operating systems as well as Windows OS.

It also works as a reverse proxy, standard mail and TCP/UDP proxy server, and can additionally be configured as a load balancer. It is powering many sites on the web; well known for its high-performance, stability and feature-rich set.

In this article, we will explain how to install, configure and manage Nginx HTTP web server on a CentOS 7 or R...

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How to configure VNC on ubuntu

Posted in Linux Servers on Mar 07, 2018

How to Install VNC on Ubuntu 16.04

Install VNC on Ubuntu 16.04

As you know, VNC is a protocol that allows sharing the desktop and controlled remotely over the internet. This simple guide helps you to install VNC on Ubuntu 16.04 machines.

Before installing the VNC server, let us install Xfce desktop.

$ sudo apt-get update
$ sudo apt-get install xfce4 xfce4-*

Install the VNC server using the following command.

$ sudo apt-get install vnc4server

VNC server listens on port 5900, but if you plan to setup port-offset in VNC; we can run a VNC service on a sub-port of the default port 5900.

For examp...

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