Category: Linux

  • How to install JDK on Ubuntu

    Installing Java JDK is easy and straightforward in Windows and OSX but not in Ubuntu. Here is how I am installing JDK on Ubuntu. Download the latest JDK package from Oracle website. If you don’t know which file to choose you ought to select .tar.gz files whether 32bit or 64bit depends on your requirements. after […]

  • What does $? mean in linux?

    The $? is called exit code of an application used to run. As an example type following commands in console: top then press CTRL-Z and then type: echo $? You will see 147 as the answer. Return values more than 128 usually means signal and you have to do the calculation by subtracting 128 from […]