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What does mean $$ or $! in Bash?
1 answers
4 points
What is defference beetween $$ and $!?
As I see, both returns some number.
1 answer
6 points
$$ returns currently run process ID (PID)
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pid=$$4
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echo "Current script PID: $pid"
$! returns last program PID that your shell ran in the background (e.g. command &)
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sleep 5 &4
pid=$!5
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echo "sleep command PID: $pid"0 commentsShow commentsAdd comment
