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the kill command basically sends signals to processes. Please see:<br />
<br />
<a href="http://unixhelp.ed.ac.uk/CGI/man-cgi?signal+7" rel="ugc">http://unixhelp.ed.ac.uk/CGI/man-cgi?signal+7</a><br />
<a href="http://www.tech-faq.com/unix-signals.shtml" rel="ugc">http://www.tech-faq.com/unix-signals.shtml</a>
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the kill command basically sends signals to processes. Please see:

http://unixhelp.ed.ac.uk/CGI/man-cgi?signal+7 [http://unixhelp.ed.ac.uk/CGI/man-cgi?signal+7]
http://www.tech-faq.com/unix-signals.shtml [http://www.tech-faq.com/unix-signals.shtml]

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what it does &nbsp;exactly???
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please see:<br />
<br />
<a href="http://en.wikipedia.org/wiki/SIGQUIT" rel="ugc">http://en.wikipedia.org/wiki/SIGQUIT</a><br />
<a href="http://www.nationmaster.com/encyclopedia/SIGQUIT" rel="ugc">http://www.nationmaster.com/encyclopedia/SIGQUIT</a>
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please see:

http://en.wikipedia.org/wiki/SIGQUIT [http://en.wikipedia.org/wiki/SIGQUIT]
http://www.nationmaster.com/encyclopedia/SIGQUIT [http://www.nationmaster.com/encyclopedia/SIGQUIT]

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what is kill -3 &nbsp;on &nbsp;java process id ????
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what is kill -3  on  java process id ????

Unix is a multitasking, multi-user computer operating system originally developed in 1969 at Bell Labs. Today, it is a modern OS with many commercial flavors and licensees, including FreeBSD, Hewlett-Packard’s UX, IBM AIX and Apple Mac OS-X. Apart from its command-line interface, most UNIX variations support the standardized X Window System for GUIs, with the exception of the Mac OS, which uses a proprietary system.