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dmesg (1)
  • dmesg (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
  • >> dmesg (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
  • dmesg (8) ( FreeBSD man: Команды системного администрирования )
  • dmesg (8) ( Русские man: Команды системного администрирования )
  • dmesg (8) ( Linux man: Команды системного администрирования )
  •  

    NAME

    dmesg - print or control the kernel ring buffer
     
    

    SYNOPSIS

    dmesg [ -c ] [ -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.
    -sbufsize
    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.
    -nlevel
    Set the level at which logging of messages is done to the console. For example, -n 1 prevents all messages, expect 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/.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    OPTIONS
    SEE ALSO
    AVAILABILITY


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