[java] Can't find/install libXtst.so.6?

I'm running Ubuntu 12.10 and I'm trying to install Netbeans 7.1(or later) I have the .sh file, but it won't install, the error appears here:

[2013-06-27 19:11:28.918]:      at org.netbeans.installer.Installer.main(Installer.java:81)
[2013-06-27 19:11:28.918]:     An error occured while initializing the NetBeans IDE installer UI.
[2013-06-27 19:11:28.918]:     Most probably the running JVM is not compatible with the current platform.
[2013-06-27 19:11:28.919]:     See FAQ at http://wiki.netbeans.org/FaqUnableToPrepareBundledJdk for more information.
[2013-06-27 19:11:28.919]:     /usr/local/java/jre1.7.0_25/lib/i386/xawt/libmawt.so: libXtst.so.6: cannot open shared object file: No such file or directory
[2013-06-27 19:11:28.919]:     
[2013-06-27 19:11:28.919]:     Exception:
[2013-06-27 19:11:28.919]:       java.lang.UnsatisfiedLinkError:
[2013-06-27 19:11:28.919]:       /usr/local/java/jre1.7.0_25/lib/i386/xawt/libmawt.so: libXtst.so.6: cannot open shared object file: No such file or directory
[2013-06-27 19:11:28.919]:     
[2013-06-27 19:11:28.919]:     You can get more details about the issue in the installer log file:
[2013-06-27 19:11:28.919]:      /root/.nbi/log/20130627191128.log

I don't have the libXtst.so.6 file in any directory, and I can't seem to find it anywhere to download. Has anyone else run into this problem, or know a work around?

This worked for me in Luna elementary OS

sudo apt-get install libxtst6:i386

Had that issue on Ubuntu 14.04, In my case I had also libXtst.so missing:

Could not open library 'libXtst.so': libXtst.so: cannot open shared object 
file: No such file or directory

Make sure your symbolic link is pointing to proper file, cd /usr/lib/x86_64-linux-gnu and list libXtst with:

 ll |grep libXtst                                                                                                                                                           
 lrwxrwxrwx   1 root root        16 Oct  7  2016 libXtst.so.6 -> libXtst.so.6.1.0
 -rw-r--r--   1 root root     22880 Aug 16  2013 libXtst.so.6.1.0

Then just create proper symbolic link using:

sudo ln -s libXtst.so.6 libXtst.so

List again:

ll | grep libXtst
lrwxrwxrwx   1 root root        12 Sep 20 10:23 libXtst -> libXtst.so.6
lrwxrwxrwx   1 root root        12 Sep 20 10:23 libXtst.so -> libXtst.so.6
lrwxrwxrwx   1 root root        16 Oct  7  2016 libXtst.so.6 -> libXtst.so.6.1.0
-rw-r--r--   1 root root     22880 Aug 16  2013 libXtst.so.6.1.0

all set!

Your problem comes from the 32/64 bit version of your JDK/JRE... Your shared lib is searched for a 32 bit version.

Your default JDK is a 32 bit version. Try to install a 64 bit one by default and relaunch your `.sh file.