First lines of dmesg

[Phillip Susi]

There are two reasons I can think of you might see this:

1) dmesg is printing a lot of messages, and the first is scrolling off 
the screen.  Scroll the terminal window up to see the first message.  If 
you can not scroll up far enough, then as others have suggested, try 
piping the output to head or less.

2) The kernel buffer wrapped around because there were so many messages. 
    The kernel only holds so many messages in its ring buffer and once 
that wraps around, the first messages will no longer be available with 
dmesg.  They should have been logged though, so you should be able to 
find them in /var/log/kern.log.

Jose Luis Alarcon Sanchez wrote:
> Hi Friends.
> 
> Where are the First lines of the output of dmesg command?
> 
> When i type dmesg in my Ubuntu GNU/Linux system, i can't see the
> "tipycal" 2 or 3 lines telling what version of the kernel is it, system
> where was compiled, version of the gcc used, etc...
> 
> Anybody knows?.
> 
> Thanks, in advance.
> 
> Regards.
> 
> Jose.
> 
>