| 12345678910111213141516171819 | #!/bin/bash
#Based on http://unix.stackexchange.com/questions/175146/apt-get-update-exit-status
#And http://unix.stackexchange.com/questions/19470/list-available-updates-but-do-not-install-them
if ! { apt-get update 2>&1 || echo E: update failed ;} | grep -q '^[WE]:';then
        echo update success
else
        echo update failure
        exit 1
fi
if [ $(aptitude search '~U' | wc -l) -gt 0 ];then
        echo Need-to-update
        exit 1
else 
        echo No-Need-to-update
        exit 0
fi
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