A Technical I.T./DevOps Blog
Problem scenario
You enter the command “npm -v” but get an error about the command not being found or recognized. How do you install npm on a RedHat derivative Linux server?
Solution
(You may want to see these directions instead if you want to use a script that will work on any distribution of Linux (including RHEL, Debian or SUSE distributions).
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Continue reading “How Do You Install npm on a CentOS/RedHat/Fedora Server?”
Problem scenario
You are trying to use a curl command but it is not working. You have no firewall blocking the connection to the website. You get the error “curl: (35) SSL connect error.”
Solution (workaround)
Install the wget utility. Use the wget command instead.
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Continue reading “How Do You Fix the Problem “curl: (35) SSL connect error”?”
Problem scenario
You want to install Puppet Master on SUSE 12.x running in AWS. You only have five minutes to complete this task. How do you install Puppet Master immediately?
Solution
1. Create this file: /etc/zypp/repos.d/puppet.repo
2. The content of the above file should be the following:
[systemsmanagement_puppet]
name=A network tool for managing many disparate systems (SLE_12)
type=rpm-md
baseurl=http://download.opensuse.org/repositories/systemsmanagement:/puppet/SLE_12/
gpgcheck=1
gpgkey=http://download.opensuse.org/repositories/systemsmanagement:/puppet/SLE_12/repodata/rep0md.xml.key
enabled=1
3.
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Continue reading “How Do You Install Puppet Master on a Linux SUSE Server (an AWS Instance)?”
Problem scenario
You are using a Linux SUSE server in AWS. You want to install Vagrant. What do you do?
Solution
Run these commands:
cd /tmp
sudo curl https://releases.hashicorp.com/vagrant/1.8.1/vagrant_1.8.1_x86_64.rpm > vagrant_1.8.1_x86_64.rpm
sudo zypper -n install vagrant_1.8.1_x86_64.rpm
To verify the installation, run this command: vagrant version
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Continue reading “How Do You Install Vagrant on an AWS Instance of SUSE?”
Problem scenario
You want to empower non-administrator users to perform a subset of Windows administrator-level functions. Specifically you want to give a user with limited privileges the ability to check the local software firewall rules. This user needs to validate if they are configured appropriately. This user account will otherwise have limited privileges. You want to adhere to the recommended practice of least privileges. You want to use JEA (Just Enough Administration) to enhance the user’s privileges.
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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,
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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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