doc: update command/dmesg.md (#517)

2023-06-19 18:07:33 +08:00 · 2023-06-19 18:07:33 +08:00 · a1549ed0c6
parent 922c39b88c
commit a1549ed0c6
1 changed files with 8 additions and 0 deletions
--- a/command/dmesg.md
+++ b/command/dmesg.md
@ -50,4 +50,12 @@ dmesg | grep sda
 [    2.448503] sd 0:0:0:0: [sda] Attached SCSI disk
 ```

+查看多关键字

+```shell
+dmesg | grep -E "vcc5v0_host|vcc_3v3_s0|ttyS"
+
+[    1.193143] vcc5v0_host: supplied by vcc5v0_usb
+[    1.481139] feb80000.serial: ttyS5 at MMIO 0xfeb80000 (irq = 73, base_baud = 1500000) is a 16550A
+[    1.513541] vcc_3v3_s0: supplied by vcc5v0_sys
+```