How to Install Suricata on an AWS Instance of SUSE Linux

0 Comments

These “directions” to install Suricata on SUSE Linux include a script and how to run it.  The script was designed to install Suricata 3.1dev on an AWS instance of SUSE 12 SP1.  This script was based on these here. This script requires that your AWS SUSE Linux server is in a security group that has access to the Internet.  The script takes approximately five minutes to run.  But bandwidth and resources on your instance may vary.

…

Continue reading “How to Install Suricata on an AWS Instance of SUSE Linux”

How To Get Hadoop Installed on Ubuntu When There Is a Java Error

0 Comments

Problem scenario:  On Ubuntu, after installing Hadoop, when you enter the command ‘/usr/local/hadoop/bin/hadoop namenode -format’ and you get this error:

“Error: JAVA_HOME is not set and could not be found.”

Solution:  Verify Java is installed (‘java -version’).  If it is not installed, you can use ‘apt-get install -y default-jre’.

Next, go to hadoop-env.sh.  Find the export JAVA_HOME stanza.  Change the ‘${JAVA_HOME}’ value to ‘/usr’ with no quotes.

…

Continue reading “How To Get Hadoop Installed on Ubuntu When There Is a Java Error”

How Do You Get All the Security Updates and OS Updates for Your Ubuntu Server to Be Applied?

0 Comments

Problem scenario
When you log into Ubuntu, you see a message like this:

8 packages can be updated.
5 updates are security updates.

You run this: sudo apt-get -y update

This completes.  But next time you log in, you see the same message about 8 packages can be updated.  What do you do?

Solution
Run this command:  sudo apt-get -y upgrade

If you are looking for deploying Hadoop to Ubuntu,

…

Continue reading “How Do You Get All the Security Updates and OS Updates for Your Ubuntu Server to Be Applied?”

How to Install Suricata on an AWS Instance of Ubuntu Linux

0 Comments

Updated on 11/28/17

Problem scenario
You want to install Suricata on Ubuntu Linux.  How do you do this?

Solution
These directions to install Suricata include a script and how to run it.   The optional script in 2.c was based on these here.  The optional script in 2.c script requires that your AWS Ubuntu Linux server is in a security group that has access to the Internet. 

…

Continue reading “How to Install Suricata on an AWS Instance of Ubuntu Linux”

How to Use Ant (when You Receive an Error about build.xml Not Existing)

0 Comments

Problem Scenario:  You want to use Ant to invoke your customized build.xml file.  But when you run it, you get “
Target “build.xml” does not exist in the project …”
Solution:  Call ant with no other variables.  Do not use “ant build.xml”.  Use “ant” by itself.
Miscellaneous:  Most CentOS/RedHat repositories will have Ant available.  As root, the command “yum install ant” should get it installed. 

…

Continue reading “How to Use Ant (when You Receive an Error about build.xml Not Existing)”

What Are the Minimum Packages Necessary for Kerberos on CentOS?

0 Comments

Question 1:  What are the packages that must be installed on a CentOS server to have it serve as the Kerberos server?

Answer 1: These three packages: krb5-server krb5-libs krb5-auth-dialog

Question 2:  What are the packages that must be installed on a CentOS server to have it serve as the Kerberos client?

Answer 2:  These three packages: 

…

Continue reading “What Are the Minimum Packages Necessary for Kerberos on CentOS?”

How Can Jenkins Invoke PsExec?

0 Comments

Problem scenario:  When using Jenkins, PsExec never seems to work when called as a batch command in a .bat file or PowerShell script.  Jenkins logs an error about the PsExec command not being found.

Solution / workaround:  PsExec seems to never work if called by a PowerShell script or a batch script via Jenkins.  The only exception seems to be if a Scheduled Task calls a .bat file or PowerShell script that uses PsExec. 

…

Continue reading “How Can Jenkins Invoke PsExec?”

How to Install Suricata on an AWS Instance of RedHat Enterprise Linux Server

0 Comments

Updated 11/29/17

These directions will allow you to install Suricata.  The script in step 2 was designed to install Suricata 4.0.1 on an AWS instance of RHEL 7.4.  This script requires that your AWS RedHat Enterprise Linux server is in a security group that has access to the internet.  You do not need a subscription to RedHat packages. 

Step #1  Log into the Red Hat Enterprise Linux server. 
Step #2 

…

Continue reading “How to Install Suricata on an AWS Instance of RedHat Enterprise Linux Server”

How To Install PsExec on Windows Server

0 Comments

Not all directions are clear.  Here is an example where Microsoft has less than perfect directions:

“Installation

Just copy PsExec onto your executable path. Typing “psexec” displays its usage syntax.”

First off, psexec won’t display usage syntax until after the installation. If you are like me you are asking what is the executable path?

The answer can be found by opening PowerShell and typing this:

Get-ChildItem Env:Path | ft -wrap -AutoSize

Any of those semi-colon delimited results can be the destination of the files inside the PsTools.zip file. 

…

Continue reading “How To Install PsExec on Windows Server”

How Do Build and Release Engineers Target Specific Servers With Jenkins Builds?

0 Comments

Problem scenario:  Using a configuration management tool, you can modify the selections of servers for your configurations to exclude specific servers.  With Puppet Master you can create classes of nodes (that exclude various Puppet Agent servers) and have manifests apply to the class.  In Puppet you can also write manifests that specify individual servers.  Chef recipes can target certain Chef clients and exclude others.  SaltStack allows the Salt Master server to “call a highstate” (or run an action) on specific Salt Minion servers to push down files or execute commands while ignoring multiple Salt Minions. 

…

Continue reading “How Do Build and Release Engineers Target Specific Servers With Jenkins Builds?”