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Posts Tagged ‘special parameters’

Special parameters in UNIX Shell

Posted by guptaradhesh on October 24, 2010

$# Number of positional parameters

$? Exit value of last executed command

$$ Process number of current process

$! Process number of background process

$* All arguments on command line

“$@” All arguments on command line ,  individually quoted “$1” “$2” …

$-    Options currently in effect

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