linux dmesg 显示可读时间格式

客官°小女子只卖身不卖艺 2021-09-01 09:56 763阅读 0赞

dmesg -T

直接用dmesg显示系统信息，很难看

\[95721.670025\] snapshot device recevied \[read\] io request, access on dev sector\[272\], length is \[240\] sectors.  
\[95721.670363\] device is closed  
\[95721.693207\] device is closed  
显示的时间没有办法看。

使用dmesg --help看到，如下：

Usage:  
 dmesg \[options\]

Display or control the kernel ring buffer.

Options:  
 -C, --clear                 clear the kernel ring buffer  
 -c, --read-clear            read and clear all messages  
 -D, --console-off           disable printing messages to console  
 -E, --console-on            enable printing messages to console  
 -F, --file <file>           use the file instead of the kernel log buffer  
 -f, --facility <list>       restrict output to defined facilities  
 -H, --human                 human readable output  
 -k, --kernel                display kernel messages  
 -L, --color\[=<when>\]        colorize messages (auto, always or never)  
                               colors are enabled by default  
 -l, --level <list>          restrict output to defined levels  
 -n, --console-level <level> set level of messages printed to console  
 -P, --nopager               do not pipe output into a pager  
 -r, --raw                   print the raw message buffer  
 -S, --syslog                force to use syslog(2) rather than /dev/kmsg  
 -s, --buffer-size <size>    buffer size to query the kernel ring buffer  
 -u, --userspace             display userspace messages  
 -w, --follow                wait for new messages  
 -x, --decode                decode facility and level to readable string  
 -d, --show-delta            show time delta between printed messages  
 -e, --reltime               show local time and time delta in readable format  
 -T, --ctime                 show human readable timestamp (may be inaccurate!)  
 -t, --notime                don't print messages timestamp  
     --time-format <format>  show time stamp using format:  
                               \[delta|reltime|ctime|notime|iso\]  
Suspending/resume will make ctime and iso timestamps inaccurate.

-h, --help     display this help and exit

可以使用-T来显示可读时间，如下：

dmesg -T

\[Fri Aug 31 17:55:32 2018\] device is closed  
\[Fri Aug 31 17:55:32 2018\] device is closed