Restrict output to the given (comma-separated) list of facilities. For example:
dmesg --facility=daemon will print messages from system daemons only. For all supported facilities see the —help output.
-l, --level list
Restrict output to the given (comma-separated) list of levels. For example:
dmesg --level=err,warn will print error and warning messages only. For all supported levels see the —help output.
-e, --reltime
Display the local time and the delta in human-readable format. Be aware that conversion to the local time could be inaccurate (see -T for more details).
-L, --color[=when]
Colorize the output. The optional argument when can be auto, never or always. If the when argument is omitted, it defaults to auto. The colors can be disabled; for the current built-in default see the —help output. See also the COLORS section below.