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You may also find the information in /var/log/messages useful.
Ok I was able to view dmesg.
I tried to run the /var/log/messages it comes back as..
"Permission denied". I am logged in as root (Super User)#
So I tried to this option: cat /var/log/messages
And I only see messages today July 13.
So we're the earlier messages cleared? Thanks
/var/log/messages is a file, not a command, so you need to use cat, less, more, vi, or some other text editor to open it and read it. It's also rotated on a regular basis, if you run "ls /var/log/messages*" you should see older versions, eg:
messages
messages-20150621
messages-20150628
messages-20150705
messages-20150712
By default, CentOS 6 rotates /var/log/messages on Sunday, which is why the current one only has information for today.
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