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Splunk

Helpful tips and tricks for Splunk.

Quickies

• Replace backslash: eval var=replace(<var>, "\\\\", <replacement>)

Formatting

Splunk uses the | ("or bar") as a means to break up statements. Instead of using one long string of statements, consider deliminating | [statement] on seperate lines.

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JBoss

Helpful tips and tricks for JBoss.

Miscellaneous

• Set JAVA_OPTS: /etc/default/jboss-eap.conf

Properties

• Modified Accented Characters on REST calls: if your REST calls containing accented characters are being modified, add the following to your standalone-full.xml:

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Maven

Helpful tips and tricks for Maven.

Quickies

• Execute a java app: mvn exec:java -Dexec.mainClass=[fully qualified name of class]
• Update properties: mvn -U versions:update-properties
• PKIX path building failed: mvn -Dmaven.wagon.http.ssl.insecure=true -Dmaven.wagon.http.ssl.allowall=true ...
• Proxies
  • http: -Dhttp.proxyHost=<host> -Dhttp.proxyPort=<port>
  • https: -Dhttps.proxyHost=<host> -Dhttps.proxyPort=<port>

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Raspbian

Helpful tips and tricks for Raspbian.

Upgrading to Buster

To upgrade your existing Raspbian OS from Stretch to Buster, perform the following:

1. apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 04EE7237B7D453EC 648ACFD622F3D138
2. grep -rl stretch /etc/apt/ | sudo xargs sed -i 's/stretch/buster/g'
3. apt update -y && apt dist-upgrade -y
4. reboot

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Debian

Tips and Tricks for Debian.

Install

List Installed Packages

Installed packages can be listed as follows:

• apt list --installed
• dpkg-query -l

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Java

Helpful tips and tricks for Java.

Quickies

• Disable XSD validation in web service calls: ((BindingProvider) port).getRequestContext().put("set-jaxb-validation-event-handler", false);
• Import jks file
  • keytool -genkey -alias [name] -keyalg RSA -keystore [jks file]

Adopt A JDK

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ELK

I'm a huge fan of Splunk and wanted similar logging functionality at home. Therefore, all baremetal/VMs/chroot'd environments send rsyslog's to admin-ap via /etc/rsyslog.d/50-default.conf:

*.* @192.168.168.2:514

rsyslogd on admin-ap

This setup is required so that all clients send their logs to one server who forwards to Logstash server v5.6.16.

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My Network

I have quite a few routers acting as client bridges around my home.

admin-ap

• LG AV System

cloud-ap

• pi-01
• pi-02
• cloud-host-02

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My Hardware

My hardware at home.

Routers

den-ap

Serves as administrative server.

Tech spec:

• Debian Buster as a chroot'd environment proved extremely challenging. It is a pure 100% Entware solution:
• Netgear WNDRv4

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My Virtual Machines

cloud-host-01

• redhat-server: Offload work development such as JBoss.

cloud-host-02

As needed

cloud-host-03

As needed