Category: Linux

ApacheBench Tool (ab)

Posted on | by @thinkcyber

ApacheBench tool comes bundled with the standard Apache source distribution for measuring the performance of HTTP web servers. This especially shows you how many requests per second your Apache is capable of serving by generating a flood of requests to a given URL and returns some easily digestible performance related metrics to the screen.

For example, the following command will execute 1000 HTTP GET requests, processing up to 10 requests concurrently, to the specified URL.

ab -k -n 1000 -c 10 "https://comparis.com/"

Linux and Unix Copy files

Posted on | by @thinkcyber

To copy a directory with all subdirectories and files, use the cp command. Below is an example command of how you would use the cp command to copy files. Additional information about this command and other examples are available through the above cp link.

cp -r /home/hope/files/* /home/hope/backup

In the example above, the cp command would copy all files, directories, and subdirectories in the /home/hope/files directory to the /home/hope/backup directory.

or

Copy a folder called /tmp/conf to /tmp/backup:

cp -avr /tmp/conf/ /tmp/backup

-a : Preserve the specified attributes such as directory an file mode, ownership, timestamps, if possible additional attributes: context, links, xattr, all.

-v : Explain what is being done.

-r : Copy directories recursively. Example

Ubuntu 14.04 – PHP Version Upgraded

Posted on | by @thinkcyber 
php -v

Shows:

PHP 5.6.25-2+deb.sury.org~trusty+1 (cli)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologiescode

In the page the php code phpinfo();

phpinfo();

Shows:
PHP Version 5.5.9-1ubuntu4.19

Now to correct this you need to:

sudo a2dismod php5
sudo a2enmod php5.6
sudo service apache2 restart

Cheers

Letsencrypt Combining plugins

Posted on | by @thinkcyber

Combining plugins

Sometimes you may want to specify a combination of distinct authenticator and installer plugins. To do so, specify the authenticator plugin with --authenticator or -a and the installer plugin with --installer or -i.

For instance, you could create a certificate using the webroot plugin for authentication and the apache plugin for installation.

certbot run -a webroot -i apache -w /var/www/html -d example.com

Link: Get more info at Certbot.

Install PHP Composer

Posted on | by @thinkcyber

1) Update your packages:

sudo apt-get update

2) Install the curl utility:

sudo apt-get install curl

3) Download the installer:

sudo curl -s https://getcomposer.org/installer | php

4) Move the composer.phar file:

sudo mv composer.phar /usr/local/bin/composer

5) Use the composer command to test the installation. If Composer is installed correctly, the server will respond with a long list of help information and commands:

user@localhost:~# composer
   ______
  / ____/___  ____ ___  ____  ____  ________  _____
 / /   / __ \/ __ `__ \/ __ \/ __ \/ ___/ _ \/ ___/
/ /___/ /_/ / / / / / / /_/ / /_/ (__  )  __/ /
\____/\____/_/ /_/ /_/ .___/\____/____/\___/_/
                /_/
Composer version 1.3.2 2017-01-27 18:23:41

Usage:
  command [options] [arguments]

Options:
  -h, --help                     Display this help message
  -q, --quiet                    Do not output any message