A Technical I.T./DevOps Blog
Problem scenario
You are using Weebly website editor. You make changes to a post, then click “Update.” You then click “Publish.” But the changes to your website are not updating. What do you do?
Solution
Log out of the Weebly editor. Close all of the instances of the web browser you were using. Then reopen the web browser. Clear the cache, history and cookies.
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Problem scenario
You are running an Ansible playbook in AWS, and you get this message:
TASK [metron-test: Create virtual private cloud] ******************************
fatal: [localhost]: FAILED! => {“changed”: false, “failed”: true, “msg”: “VpcLimitExceeded: The maximum number of VPCs has been reached.”}
to retry, use: –limit @/usr/bin/metron/metron-deployment/amazon-ec2/playbook.retry
Solution
You must have an AWS account with a special maximum of VPCs.
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Problem scenario
Using PHP you want to connect to a specific database to run SQL queries. How do you do this?
Solution
Assuming you have installed PHP and Postgres on the same Ubuntu Linux server, install the php-pgsql package. Follow this link if you need assistance.
1. Create a file like this named contint.php:
<?php
$host
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Continue reading “How Do You Connect to a Specific Database in Postgres Using PHP?”
Problem scenario
You want a web page with a text field to enter a single line of SQL code. You want this code (as opposed to some fixed, pre-written code) to execute. How do you do this?
Solution
This is more dangerous because SQL injection attacks are a serious problem. This link is how to have a PHP page execute fixed code.
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5 Important Facts You Need to Know About Computer Forensics by Trisha Halfacre
The Art of Memory Forensics: Detecting Malware and Threats in Windows, Linux, and Mac Memory by Michael Hale Ligh, Andrew Case, Jamie Levy and AAron Walters
The Basics of Digital Forensics, Second Edition: The Primer for Getting Started in Digital Forensics by John Sammons
Computer Forensics by Marie-Helen Maras
Computer Forensics and Cyber Crime: An Introduction (3rd Edition) by Marjie T.
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Problem scenario
How do you install Nginx on a Debian or Ubuntu Linux server?
Solution
Run these three commands:
sudo apt-get -y update
sudo apt-get -y install nginx
sudo systemctl restart nginx
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Continue reading “How Do You Install Nginx on a Debian/Ubuntu Server?”
Problem scenario
You want to read in user input via a web page. You then want that user input to participate in an invocation of a SQL command. How do you get user input to be a variable in the construction of a SQL command that is automatically executed when a web-page button is clicked?
Solution
Warning
This does not prevent against SQL injection attacks.
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Continue reading “How Can You Accept User Input with PHP and Use It in a SQL Command?”
Cloud Computing and Electronic Discovery (Wiley CIO) by James P. Martin and Harry Cendrowski
E-Discovery and Data Privacy: A Practical Guide by Catrien Noorda and Stefan Hanloser
E-Discovery and the Federal Rules of Civil Procedure: A Pocket Guide by Bradley Schaufenbuel
E-discovery: Creating and Managing an Enterprisewide Program – A Technical Guide to Digital Investigation and Litigation Support by Karen A. Schuler
e-Discovery: Current Trends and Cases by Ralph C.
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Problem scenario
You want a REST call to invoke some SQL code on a Postgres database. How do you do this?
Solution
Install Apache web server, PHP, and the PHP-pgsql package on your Postgresql database server. This example assumes you have PHP, Apache web server, Postgres, and the php-pgsql package installed on your server. Assuming the web server is running and the default directory for web pages is still /var/www/html/ do the following.
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Continue reading “How Do You Get a Web Page to Invoke a Postgres Command (e.g., for a RESTful API)?”
CentOS 6.2 Configuring Squid By Example (CentOS 6 By Example Book 5) by Mike Dittmeier
Squid: The Definitive Guide by Duane Wessels
Squid Proxy Server 3.1: Beginner’s Guide by Kulbir Saini
Web Proxy Cache Replacement Strategies: Simulation, Implementation, and Performance Evaluation (SpringerBriefs in Computer Science) by Hala ElAarag
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