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This is about the Unix utility "test," also invoked as "[", or its shell syntax [[ … ]] variant. For questions about testing software and setups, use the "testing" tag.

52
votes
Your missing ]' error is because you need a space at the inbetween "Shared" and ], so the line should be if [ "$(ipcs | grep Shared | awk '{print $2}')" == "Shared" ]; then.
answered Oct 9 '14 by Yann