# Noob problem: NoClassDefFoundError **URL:** \ **Category:** Elasticsearch\ **Created:** [November 13, 2010, 11:41pm UTC](https://discuss.elastic.co/t/noob-problem-noclassdeffounderror/3566 "2010-11-13T23:41:21Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![timscott](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/timscott/32/3220_2.png) [@timscott](https://discuss.elastic.co/u/timscott)\ **Post date:** [November 13, 2010, 11:41pm UTC](https://discuss.elastic.co/t/noob-problem-noclassdeffounderror/3566/1 "2010-11-13T23:41:21Z")
I am a newbie to ElasticSearch and Linux. I got it running on my Mac with no problem by following the simple installation instructions. I just installed Linux Mint on a spare box, and I'm trying to get it running there. I followed the exact same procedure on my Mac, but I get an exception: Exception in thread "main" java.lang.NoClassDefFoundError: org/ elasticsearch/bootstrap/Bootstrap Caused by: java.lang.ClassNotFoundException: org.elasticsearch.bootstrap.Bootstrap at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) Could not find the main class: org.elasticsearch.bootstrap.Bootstrap. Program will exit. I Googled this error and found some stuff about CLASSPATH. I hacked around without luck. Being a .NET guy and Linux/Java dummy. I probably don't quite get the concept of CLASSPATH. By the way, I don't know the proper place to put the install. I put it under my user folder (where Downloads and Documents are). This is where I put it on my Mac, so maybe that's fine. Any help is appreciated. ---
**Author:** ![timscott](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/timscott/32/3220_2.png) [@timscott](https://discuss.elastic.co/u/timscott)\ **Post date:** [November 13, 2010, 11:51pm UTC](https://discuss.elastic.co/t/noob-problem-noclassdeffounderror/3566/2 "2010-11-13T23:51:13Z")
The problem is not that I'm a noob, but that I am an idiot. I chose the wrong download. Never mind. On Nov 13, 5:41 pm, Tim Scott [tsc...@lunaversesoftware.com](mailto:tsc...@lunaversesoftware.com) wrote: > I am a newbie to Elasticsearch and Linux. I got it running on my Mac > with no problem by following the simple installation instructions. I > just installed Linux Mint on a spare box, and I'm trying to get it > running there. I followed the exact same procedure on my Mac, but I > get an exception: > > Exception in thread "main" java.lang.NoClassDefFoundError: org/ > elasticsearch/bootstrap/Bootstrap > Caused by: java.lang.ClassNotFoundException: > org.elasticsearch.bootstrap.Bootstrap > at java.net.URLClassLoader$1.run(URLClassLoader.java:202) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(URLClassLoader.java:190) > at java.lang.ClassLoader.loadClass(ClassLoader.java:307) > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) > at java.lang.ClassLoader.loadClass(ClassLoader.java:248) > Could not find the main class: org.elasticsearch.bootstrap.Bootstrap. > Program will exit. > > I Googled this error and found some stuff about CLASSPATH. I hacked > around without luck. Being a .NET guy and Linux/Java dummy. I > probably don't quite get the concept of CLASSPATH. > > By the way, I don't know the proper place to put the install. I put > it under my user folder (where Downloads and Documents are). This is > where I put it on my Mac, so maybe that's fine. > > Any help is appreciated. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 4:16am UTC](https://discuss.elastic.co/t/noob-problem-noclassdeffounderror/3566/3 "2017-07-06T04:16:33Z")