Hello Guys,
The Apache ab (apache benchmark) tool typically comes default with RHEL and CentOS systems. It can be used for benchmarking differences in a website (such as before and after optimizing a page) or changing PHP handlers.
You can check if it is install or not by running following command.
Quote#whereis ab
You will get the below output if it is installed on your server.
Quote# whereis ab
ab: /usr/bin/ab /usr/share/man/man1/ab.1.gz
If it is not then you have to remove httpd* from /etc/yum.conf exclude line and run following command to install it.
Quote#yum install httpd-tools
That's all, enjoy !!