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시스템 부팅메시지 전체를 확인하기

관리자 작성
작성일 2023.04.19 10:45

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시스템 부팅메시지 전체를 확인하기

앞서 말씀 드렸듯이 시스템 부팅메시지는 /var/log/dmesg파일입니다.

따라서 이 파일을 먼저 살펴보도록 하겠습니다.

아래의 예는 현재 필자가 사용하고 있는 리눅스 시스템의 /var/log/dmesg파일의 일부분만을 확인한 것입니다.

(이 파일의 내용이 너무 많아서…)

[root@su249 log]# ls -l /var/log/dmesg

-rw-r--r-- 1 root root 18188 2008-11-29 19:37 /var/log/dmesg

[root@su249 log]#

[root@su249 log]# cat /var/log/dmesg

Initializing cgroup subsys cpuset

Initializing cgroup subsys cpu

Linux version 2.6.25-14.fc9.i686 (mockbuild@) (gcc version 4.3.0 20080428 (Red Hat 4.3.0-8) (GCC) ) #1 SMP Thu May 1 06:28:41 EDT 2008

BIOS-provided physical RAM map:

BIOS-e820: 0000000000000000 - 000000000009f800 (usable)

BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved)

BIOS-e820: 00000000000ca000 - 00000000000cc000 (reserved)

BIOS-e820: 00000000000dc000 - 0000000000100000 (reserved)

BIOS-e820: 0000000000100000 - 000000007fef0000 (usable)

BIOS-e820: 000000007fef0000 - 000000007feff000 (ACPI data)

BIOS-e820: 000000007feff000 - 000000007ff00000 (ACPI NVS)

BIOS-e820: 000000007ff00000 - 0000000080000000 (usable)

BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved)

BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)

BIOS-e820: 00000000fffe0000 - 0000000100000000 (reserved)

1152MB HIGHMEM available.

896MB LOWMEM available.

Scan SMP from c0000000 for 1024 bytes.

Scan SMP from c009fc00 for 1024 bytes.

Scan SMP from c00f0000 for 65536 bytes.

found SMP MP-table at [c00f6c90] 000f6c90

Using x86 segment limits to approximate NX protection

Entering add_active_range(0, 0, 524288) 0 entries of 256 used

Zone PFN ranges:

DMA 0 -> 4096

Normal 4096 -> 229376

HighMem 229376 -> 524288

Movable zone start PFN for each node

early_node_map[1] active PFN ranges

0: 0 -> 524288

On node 0 totalpages: 524288

DMA zone: 32 pages used for memmap

DMA zone: 0 pages reserved

DMA zone: 4064 pages, LIFO batch:0

Normal zone: 1760 pages used for memmap

Normal zone: 223520 pages, LIFO batch:31

HighMem zone: 2304 pages used for memmap

HighMem zone: 292608 pages, LIFO batch:31

Movable zone: 0 pages used for memmap

DMI present.

Using APIC driver default

ACPI: RSDP 000F6C20, 0014 (r0 PTLTD )

ACPI: RSDT 7FEFAB5A, 0030 (r1 PTLTD RSDT 6040000 LTP 0)

ACPI: FACP 7FEFEF06, 0074 (r1 INTEL 440BX 6040000 PTL F4240)

ACPI: DSDT 7FEFAB8A, 437C (r1 PTLTD Custom 6040000 MSFT 100000D)

ACPI: FACS 7FEFFFC0, 0040

ACPI: APIC 7FEFEF7A, 005E (r1 PTLTD APIC 6040000 LTP 0)

ACPI: BOOT 7FEFEFD8, 0028 (r1 PTLTD $SBFTBL$ 6040000 LTP 1)

ACPI: PM-Timer IO Port: 0x1008

ACPI: Local APIC address 0xfee00000

ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)

Processor #0 6:15 APIC version 17

ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled)

Processor #1 6:15 APIC version 17

ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])

ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])

ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])

IOAPIC[0]: apic_id 2, version 17, address 0xfec00000, GSI 0-23

ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 high edge)

ACPI: IRQ0 used by override.

ACPI: IRQ2 used by override.

ACPI: IRQ9 used by override.

Enabling APIC mode: Flat. Using 1 I/O APICs

Using ACPI (MADT) for SMP configuration information

Allocating PCI resources starting at 88000000 (gap: 80000000:7ec00000)

PM: Registered nosave memory: 000000000009f000 - 00000000000a0000

PM: Registered nosave memory: 00000000000a0000 - 00000000000ca000

PM: Registered nosave memory: 00000000000ca000 - 00000000000cc000

PM: Registered nosave memory: 00000000000cc000 - 00000000000dc000

PM: Registered nosave memory: 00000000000dc000 - 0000000000100000

Built 1 zonelists in Zone order, mobility grouping on. Total pages: 520192

Kernel command line: ro root=UUID=a09a8da5-eb92-47c6-a353-00b4b0e40173 rhgb quiet

mapped APIC to ffffb000 (fee00000)

mapped IOAPIC to ffffa000 (fec00000)

Enabling fast FPU save and restore... done.

Enabling unmasked SIMD FPU exception support... done.

Initializing CPU#0

CPU 0 irqstacks, hard=c07b9000 soft=c0799000

PID hash table entries: 4096 (order: 12, 16384 bytes)

Detected 2194.391 MHz processor.

…..이하 생략

보시는 바와 같이 부팅메시지는 시스템의 정상운용에 꼭 필요한 하드웨어에 대한 중요한 정보들이 저장되어 있습니다.

이 파일의 내용은 텍스트로 되어있기 때문에 vi나 cat으로도 확인할 수 있습니다.

자, 그럼 먼저 다음 예와 같이 쉘상태에서 dmesg라고 하면 시스템의 전체 부팅메시지를 결과로 출력해 줍니다.

[root@su249 log]# dmesg