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    The following form allows you to view linux man pages.

    Command:

    dmesg

    
    
    

    SYNOPSIS

           dmesg [-c] [-r] [-n level] [-s bufsize]
    
    
    

    DESCRIPTION

           dmesg is used to examine or control the kernel ring buffer.
    
           The program helps users to print out their bootup messages.  Instead of
           copying the messages by hand, the user need only:
                  dmesg > boot.messages
           and mail the boot.messages file to whoever can debug their problem.
    
    
    

    OPTIONS

           -c     Clear the ring buffer contents after printing.
    
           -r     Print the raw message buffer, i.e., don't strip  the  log  level
                  prefixes.
    
           -s bufsize
                  Use  a  buffer  of size bufsize to query the kernel ring buffer.
                  This is 16392 by default.  (The  default  kernel  syslog  buffer
                  size was 4096 at first, 8192 since 1.3.54, 16384 since 2.1.113.)
                  If you have set the kernel buffer to be larger than the  default
                  then this option can be used to view the entire buffer.
    
           -n level
                  Set  the  level at which logging of messages is done to the con-
                  sole.  For example, -n 1 prevents  all  messages,  except  panic
                  messages, from appearing on the console.  All levels of messages
                  are still written to /proc/kmsg, so syslogd(8) can still be used
                  to  control  exactly  where kernel messages appear.  When the -n
                  option is used, dmesg will not print or clear  the  kernel  ring
                  buffer.
    
                  When  both options are used, only the last option on the command
                  line will have an effect.
    
    
    

    SEE ALSO

           syslogd(8)
    
    
    

    AVAILABILITY

           The dmesg command is part of the util-linux-ng package and is available
           from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.
    
                                                                          DMESG(1)
    
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