After implementing automatic Enterprise Manager & WebView startup at Linux server boot time via changes to /etc/rc.local, the Linux kernel boot sequence seems to hang & control does not return to the VM console being used. The last message visible is "[INFO] [ WebServer] Web Application Server started" which is from the WebView startup.
Redhat Enterprise Linux 6.4 in Virtual Environment
It appears that not having IO redirection for the executable Introscope_Webview was causing the boot sequence to hang. Using the commands below in/etc/rc.local enabled the boot sequence to complete and VM console to return to user prompt.
NOTE: even though EMCtrl.sh itself uses nohup and redirects standard out & error, the messages the script itself generates should be redirected as per below.
# Start EM
./EMCtrl.sh start &>emctrl.log &
# Start WebView
nohup ./Introscope_WebView &>webview.log &
NOTE: EM_HOME should be replaced with the actual EM install directory path