dmesgコマンドの説明します。
説明
dmesgはLinux起動時からのログを出力するコマンドです。
使い方：dmesg
読み方：ディーメッセージ
略：display message
具体例
＃ ログを画面に表示させる
[root@CE08PRD101 dmesg]# dmesg
（省略）
[ 101.400174] 00:17:56.401016 main VBoxService 6.1.8 r137981 (verbosity: 0) linux.amd64 (May 14 2020 20:41:21) release log
00:17:56.401019 main Log opened 2020-09-26T00:17:56.401010000Z
[ 101.401316] 00:17:56.402194 main OS Product: Linux
[ 101.401724] 00:17:56.402619 main OS Release: 4.18.0-193.19.1.el8_2.x86_64
[ 101.402096] 00:17:56.402994 main OS Version: #1 SMP Mon Sep 14 14:37:00 UTC 2020
[ 101.402525] 00:17:56.403404 main Executable: /opt/VBoxGuestAdditions-6.1.8/sbin/VBoxService
00:17:56.403405 main Process ID: 1794
00:17:56.403406 main Package type: LINUX_64BITS_GENERIC
[ 101.404674] 00:17:56.405557 main 6.1.8 r137981 started. Verbose level = 0
[ 101.406224] 00:17:56.407084 main vbglR3GuestCtrlDetectPeekGetCancelSupport: Supported (#1)