Find a Class in a bunch of JAR Files

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for j in *.jar; do echo $j:; jar -tvf "$j" | grep -Hsi ClassName; done

  1. Iterate over every jar in your folder.
  2. Output every JAR Name (to match found classes to JARs lateron)
  3. List Content of every JAR ( jar -tvf “$j” )
  4. Grep for that specific ClassName grep -Hsi ClassName

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SSH Tunnel RDP Session over another Host

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Let’s say you want to tunnel an RDP connection via SSH.
User: phaus


You need to run that script and keep your session open.
You can then access the remote System with a RDP Client over localhost 13389.

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Fixing Error installing cocoa-pods on MacOS

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If you installing cocoapods on a vanilla MacOS System you might get some error like this:

# sudo gem install cocoapods
Building native extensions.  This could take a while...
ERROR:  Error installing cocoapods:
    ERROR: Failed to build gem native extension.

    /usr/local/bin/ruby extconf.rb
creating Makefile

gcc -I. -I/usr/local/include/ruby-1.9.1/x86_64-darwin10.6.0 -I/usr/local/include/ruby-1.9.1/ruby/backward -I/usr/local/include/ruby-1.9.1 -I. -DJSON_GENERATOR -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -fno-common -D_XOPEN_SOURCE=1 -fno-common -pipe -O3 -Wall -O0 -ggdb  -o generator.o -c generator.c
gcc -dynamic -bundle -o generator.bundle generator.o -L. -L/usr/local/lib -L. -L/usr/local/lib -Wl,-undefined,dynamic_lookup -Wl,-multiply_defined,suppress -Wl,-flat_namespace  -lruby.1.9.1  -lpthread -ldl -lobjc

make  install
/opt/local/bin/gmkdir -p /usr/local/lib/ruby/gems/1.9.1/gems/json-1.8.0/ext/json/ext/generator/.gem.20130925-59217-5zt5ke/json/ext
make: /opt/local/bin/gmkdir: No such file or directory
make: *** [/usr/local/lib/ruby/gems/1.9.1/gems/json-1.8.0/ext/json/ext/generator/.gem.20130925-59217-5zt5ke/json/ext] Error 1

The important error is make: /opt/local/bin/gmkdir: No such file or directory

You need to install coreutils for fixing this.

With MacPorts:

sudo port install coreutils

For Homebrew:

sudo brew install coreutils

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use 3rd party Dependencies in your Maven Project

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Deploy your JAR to your local (file) Repository. You shold also commit this to your CVM System. You can also add JARs as Javadoc or Source.

    mvn deploy:deploy-file \
        -DgroupId=<group-id> \
        -DartifactId=<artifact-id> \
        -Dversion=<version> \
        -Dfile=<path-to-file> \
        -Dpackaging=jar \
        ( -Dclassifier=javadoc | sources  )

You can now use these JARs in your pom File if they were in a normal Repository:


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