Install RPM in CentOS RPM Package Manager (RPM), originally called the Red-hat Package Manager, is a program to install or uninstall software packages or libraries in Linux. To install RPM in CentOS, first download the RPM: [roop@localhost ~]$ wget ftp://rpmfind.net/linux/centos/6.6/os/x86_64/Packages/opencv-2.0.0-12.el6.x86_64.rpm now check in your directory opencv-2.0.0-12.el6.x86_64.rpm will be available for installation.To install RPM in CentOS…
This post will be demonstrating how to use curl with proxy in PHP and Linux command line. What is additional parameter we need to pass while using curl via proxy. So I am starting with proxy configuration in PHP curl. 1) PHP curl with proxy $url = ‘http://localhost/path/to/file.php’; $proxy = ‘127.0.0.2:3128’; $ch = curl_init(); curl_setopt($ch,…
Here is the simple shell script to rename all files in the folder with increasing number. In below example I am going to rename all jpg image with increasing number. #!/bin/bash a=1 for i in *.jpg; do new=$(printf “%04d.jpg” “$a”) mv — “$i” “$new” let a=a+1 done Output: 0001.jpg 0002.jpg 0003.jpg 0004.jpg 0005.jpg 0006.jpg 0007.jpg…
Shell script to run mysql query from command line without login into mysql command prompt. You can use these shell script for quickly execution of MySQL query from a Linux Shell. Method 1: #!/bin/bash #Script to run mysql query from command line #Db Connection. DB_USER=’root’ DB_PASSWD=’mypwd’ DB_NAME=’mydb’ #Prepare sql query QUERY=’select * from employee’ #Command to connect…
Here is the simple shell script check the MySQL service status, if MySQL service is not running then start MySQL service. #!/bin/bash SERVICE=’mysql’ if ps ax | grep -v grep | grep $SERVICE > /dev/null then echo “$SERVICE service is running.” else echo “$SERVICE is not running” service mysqld start fi Let me describe about…
I am using two tool to benchmark query performance of an Elasticsearch server. Initially I faced problem to test elasticsearch query performance for large elasticsearch query as it’s very hard to put large query in command line. Then I found these two tool, having support to pass json as a POST parameter. Tools are :…
Apache Bench for Load Testing AB( Apache Bench) is a command line utility to measure performance of any web server. It’s originally designed to test the Apache HTTP server. AB is free open source software and distributed under the terms of the Apache License. It’s good practice to Benchmark performance of the any server before…
Siege is simple load testing and benchmarking tool. Siege support GET and POST method to test your webservers through cookies, HTTP , HTTPS and FTP protocols. You can test single or multiple web urls in a single test . Installation on Linux : Download latest version Siege from official website https://www.joedog.org/siege-home/. Current latest version is “siege-3.1.0”…
Install Elasticsearch using Repositories You can easily install Elasticsearch using APT and YUM repository – Install Elasticsearch Using APT repository – Install Elasticsearch Using Yum repository Install Elasticsearch 5.0 on Debian: Step 1: Download and Install Elasticsearch Public signin key wget -qO – https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add – Step 2: Installation using APT Repository…
