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mycode.js

		exec: {

			//get IP & Set a local variable
			get_ip: {
				command: 'ifconfig | grep -m 1 "inet addr:192.168.1" | cut -c21-31',
				callback: function (error, stdout, stderr) {
					if (error !== null) {
						grunt.log.error('exec error: ' + error);
					};
					globalConfig.myIP = stdout;
					console.log('set myIP:', globalConfig.myIP);
				},
				stdout: false,
				stderr: false

			}