看Linux启动时屏幕的显示信息，我们在启动完毕后可以使用命令dmesg查看。
示例如下：
[root@localhost /]# dmesg
pci_bus&">nbsp;0000:1f: resource 2 [mem 0xd9d00000-0xd9dfffff 64bit pref] pci_bus 0000:20: resource 1 [mem 0xcbb00000-0xcbbfffff] pci_bus 0000:20: resource 2 [mem 0xda100000-0xda1fffff 64bit pref] pci_bus 0000:21: resource 1 [mem 0xcbf00000-0xcbffffff] pci_bus 0000:21: resource 2 [mem 0xda500000-0xda5fffff 64bit pref] pci_bus 0000:22: resource 1 [mem 0xcc300000-0xcc3fffff] pci_bus 0000:22: resource 2 [mem 0xda
900000-0xda9fffff 64bit pref] NET: Registered protocol family 2 IP route cache hash table entries: 32768 (order: 5, 131072 bytes) TCP established hash table entries: 131072 (order: 8, 1048576 bytes) TCP bind hash table entries: 65536 (order: 7, 524288 bytes) TC
P: Hash tables
configured (established 131072 bind 65536) TCP reno registered NET: Registered protocol family 1 pci 0000:00:00.0: Limiting direct PCI/PCI transfers pci 0000:00:0f.0: Boot video
device alloc irq_desc for 18 on node -1 alloc kstat_irqs on node -1 pci 0000:02:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18 pci 0000:02:00.0: PCI INT A disabled alloc irq_desc for 17 on node -1 alloc kstat_irqs on node -1 pci 0000:02:03.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 pci 0000:02:03.0: PCI INT A disabled Tr
ying to unpack rootfs image as initramfs... Freeing initrd memory: 15012k freed Simple Boot Flag at 0x36 set to 0x1 apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16ac) apm: disabled - APM is not SMP safe. audit:
initializing netlink socket (disabled) type=2000 audit(1371517477.032:1): initialized highmem bounce pool size: 64 pages HugeTLB registered 2 MB page size, pre-allocated 0 pages VFS: Disk quotas dquot_6.5.2 Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) msgmni has been set to 1461 SELinux: Registering netfilter hooks alg: No test for stdrng (krng) ksign: Installing public key data Loading keyring - Added public key 834D293187AE1760 - User ID:
CentOS (Kernel
Module GPG key) Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251) io scheduler noop registered io scheduler anticipatory registered io scheduler deadline registered io scheduler cfq registered (default) pcieport 0000:00:15.0: setting latency timer to 64 alloc irq_desc for 24 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:15.0: irq 24 for MSI/MSI-X pcieport 0000:00:15.1: setting latency timer to 64 alloc irq_desc for 25 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:15.1: irq 25 for MSI/MSI-X pcieport 0000:00:15.2: setting latency timer to 64 alloc irq_desc for 26 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:15.2: irq 26 for MSI/MSI-X pcieport 0000:00:15.3: setting latency timer to 64 alloc irq_desc for 27 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:15.3: irq 27 for MSI/MSI-X pcieport 0000:00:15.4: setting latency timer to 64 alloc irq_desc for 28 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:15.4: irq 28 for MSI/MSI-X pcieport 0000:00:15.5: setting latency timer to 64 alloc irq_desc for 29 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:15.5: irq 29 for MSI/MSI-X pcieport 0000:00:15.6: setting latency timer to 64 alloc irq_desc for 30 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:15.6: irq 30 for MSI/MSI-X pcieport 0000:00:15.7: setting latency timer to 64 alloc irq_desc for 31 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:15.7: irq 31 for MSI/MSI-X pcieport 0000:00:16.0: setting latency timer to 64 alloc irq_desc for 32 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:16.0: irq 32 for MSI/MSI-X pcieport 0000:00:16.1: setting latency timer to 64 alloc irq_desc for 33 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:16.1: irq 33 for MSI/MSI-X pcieport 0000:00:16.2: setting latency timer to 64 alloc irq_desc for 34 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:16.2: irq 34 for MSI/MSI-X pcieport 0000:00:16.3: setting latency timer to 64 alloc irq_desc for 35 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:16.3: irq 35 for MSI/MSI-X pcieport 0000:00:16.4: setting latency timer to 64 alloc irq_desc for 36 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:16.4: irq 36 for MSI/MSI-X pcieport 0000:00:16.5: setting latency timer to 64 alloc irq_desc for 37 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:16.5: irq 37 for MSI/MSI-X pcieport 0000:00:16.6: setting latency timer to 64 alloc irq_desc for 38 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:16.6: irq 38 for MSI/MSI-X pcieport 0000:00:16.7: setting latency timer to 64 alloc irq_desc for 39 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:16.7: irq 39 for MSI/MSI-X pcieport 0000:00:17.0: setting latency timer to 64 alloc irq_desc for 40 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:17.0: irq 40 for MSI/MSI-X pcieport 0000:00:17.1: setting latency timer to 64 alloc irq_desc for 41 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:17.1: irq 41 for MSI/MSI-X pcieport 0000:00:17.2: setting latency timer to 64 alloc irq_desc for 42 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:17.2: irq 42 for MSI/MSI-X pcieport 0000:00:17.3: setting latency timer to 64 alloc irq_desc for 43 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:17.3: irq 43 for MSI/MSI-X pcieport 0000:00:17.4: setting latency timer to 64 alloc irq_desc for 44 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:17.4: irq 44 for MSI/MSI-X pcieport 0000:00:17.5: setting latency timer to 64 alloc irq_desc for 45 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:17.5: irq 45 for MSI/MSI-X pcieport 0000:00:17.6: setting latency timer to 64 alloc irq_desc for 46 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:17.6: irq 46 for MSI/MSI-X pcieport 0000:00:17.7: setting latency timer to 64 alloc irq_desc for 47 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:17.7: irq 47 for MSI/MSI-X pcieport 0000:00:18.0: setting latency timer to 64 alloc irq_desc for 48 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:18.0: irq 48 for MSI/MSI-X pcieport 0000:00:18.1: setting latency timer to 64 alloc irq_desc for 49 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:18.1: irq 49 for MSI/MSI-X pcieport 0000:00:18.2: setting latency timer to 64 alloc irq_desc for 50 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:18.2: irq 50 for MSI/MSI-X pcieport 0000:00:18.3: setting latency timer to 64 alloc irq_desc for 51 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:18.3: irq 51 for MSI/MSI-X pcieport 0000:00:18.4: setting latency timer to 64 alloc irq_desc for 52 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:18.4: irq 52 for MSI/MSI-X pcieport 0000:00:18.5: setting latency timer to 64 alloc irq_desc for 53 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:18.5: irq 53 for MSI/MSI-X pcieport 0000:00:18.6: setting latency timer to 64 alloc irq_desc for 54 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:18.6: irq 54 for MSI/MSI-X pcieport 0000:00:18.7: setting latency timer to 64 alloc irq_desc for 55 on node -1 alloc kstat_irqs on node -1 pcieport 0000:00:18.7: irq 55 for MSI/MSI-X pci_hotplug: PCI Hot Plug PCI Core version:
0.5 ......