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Understanding PATH variable setting?

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# 1  
Old 12-12-2012
Understanding PATH variable setting?
I do know how we set the PATH variable-

Code:
 
export PATH=$JAVA_HOME/bin:$PATH

I'm trying to understand why we have written
Code:
:$PATH

in the end above statement. What is it's meaning?
# 2  
Old 12-12-2012
It means append new path $JAVA_HOME/bin to existing PATH variable value. It you do not specify :$PATH, the PATH variable value will be entirely overwritten with the new value, but in this case we are retaining previous value and appending to it.

For further reference click here
Last edited by Yoda; 12-12-2012 at 04:37 PM..
# 3  
Old 12-12-2012
cool. thanks.
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