How can I learn to interpret log messages in Console?

I was given some instuctions on how to use Console to help solve a problem with my 24-inch Early 2009 iMac (3.06 GHz Intel Core 2 Duo, 8 GB 1067 MHz DDR3) becoming unresponsive and hanging which I solved for a while by removing Google Drive from my startup items (it was crashing).
Now a similar problem has returned where it takes up to twenty minutes for my iMac to startup and become responsive. I returned to Console to see it I could figure out what was wrong on my own and realized I have little idea what the Console messages are telling me.
For example I see these 3 lines repeatedly:
4/15/15 12:02:05.658 PM configd: DHCPv6 en0: SendInformRequest transmit failed, Can't assign requested address
4/15/15 12:02:41.941 PM ntpd: bind(31) AF_INET6 fe80::226:b0ff:fee3:5444%4#123 flags 0x11 failed: Can't assign requested address
4/15/15 12:02:41.941 PM ntpd: unable to create socket on en0 (121) for fe80::226:b0ff:fee3:5444#123
I have an Apple TV, 2 Kindles, and a MacBook Pro and wonder if these messages relate to Network communications between my devices or …?
Another example:
4/14/15 10:59:59.877 PM iTunes: Failed to create replacement string
Does this indicate a problem or is it simple the result of turning off iTunes use of speakers connected to my Apple TV?
Is there a reference or text somewhere that I can access to learn how to interpret Console messages?
Thanks,
Mike Barrett

That article assumes you know how to obtain and install a signing certificate.
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Onderwerp: How can I get rid of the message that I am using a trial version of Photoshop CC even after becoming a paying member for Photoshop CC and Lightroom ?
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