Linux sistemi açılış sırasında ekrana açılış notlarını göndermektedir. Bu loglar çekirdek log tamponuna yazılmaktadır. Çekirdek log tamponunu listelemek için
dmesg
komutu kullanılır. Çok önemli olan bu logların kaybını önlemek için açılış scripti bu logları /var/log/dmesg dosyasına yazmaktadır.
Örnek bir dmesg dosyasının içeriği
Linux version 2.4.2-2 (root@porky.devel.redhat.com) (gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-79)) #1 Sun Apr 8 20:41:30 EDT 2001
BIOS-provided physical RAM map:
BIOS-e820: 000000000009fc00 @ 0000000000000000 (usable)
BIOS-e820: 0000000000000400 @ 000000000009fc00 (reserved)
BIOS-e820: 0000000000020000 @ 00000000000e0000 (reserved)
BIOS-e820: 000000000fee0000 @ 0000000000100000 (usable)
BIOS-e820: 0000000000010000 @ 000000000ffe0000 (ACPI data)
BIOS-e820: 0000000000010000 @ 000000000fff0000 (ACPI NVS)
BIOS-e820: 0000000000080000 @ 00000000fff80000 (reserved)
On node 0 totalpages: 65504
zone(0): 4096 pages.
zone DMA has max 32 cached pages.
zone(1): 61408 pages.
zone Normal has max 479 cached pages.
zone(2): 0 pages.
zone HighMem has max 1 cached pages.
Kernel command line: auto BOOT_IMAGE=linux ro root=305 BOOT_FILE=/boot/vmlinuz-2.4.2-2
Initializing CPU#0
Detected 935.473 MHz processor.
Console: colour VGA+ 80x25
Calibrating delay loop... 1867.77 BogoMIPS
Memory: 255228k/262016k available (1365k kernel code, 6400k reserved, 92k data, 236k init, 0k highmem)
Dentry-cache hash table entries: 32768 (order: 6, 262144 bytes)
Buffer-cache hash table entries: 16384 (order: 4, 65536 bytes)
Page-cache hash table entries: 65536 (order: 7, 524288 bytes)
Inode-cache hash table entries: 16384 (order: 5, 131072 bytes)
VFS: Diskquotas version dquot_6.5.0 initialized
CPU: Before vendor init, caps: 0387f9ff 00000000 00000000, vendor = 0
CPU: L1 I cache: 16K, L1 D cache: 16K
CPU: L2 cache: 256K
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
CPU: After vendor init, caps: 0387f9ff 00000000 00000000 00000000
CPU serial number disabled.
CPU: After generic, caps: 0383f9ff 00000000 00000000 00000000
CPU: Common caps: 0383f9ff 00000000 00000000 00000000
CPU: Intel Pentium III (Coppermine) stepping 06
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
POSIX conformance testing by UNIFIX
mtrr: v1.37 (20001109) Richard Gooch (rgooch@atnf.csiro.au)
mtrr: detected mtrr type: Intel
PCI: PCI BIOS revision 2.10 entry at 0xfdb21, last bus=2
PCI: Using configuration type 1
PCI: Probing PCI hardware
PCI: Using IRQ router default [8086/2410] at 00:1f.0
isapnp: Scanning for PnP cards...
isapnp: No Plug & Play device found
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
apm: BIOS not found.
Starting kswapd v1.8
pty: 256 Unix98 ptys configured
block: queued sectors max/low 169421kB/56473kB, 512 slots per queue
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
Uniform Multi-Platform E-IDE driver Revision: 6.31
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
PIIX4: IDE controller on PCI bus 00 dev f9
PIIX4: chipset revision 2
PIIX4: not 100% native mode: will probe irqs later
ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:pio
ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:DMA, hdd:pio
hda: ST320413A, ATA DISK drive
hdc: SS06 SAMSUNG DVD-ROM SD-612S, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: 39102336 sectors (20020 MB) w/512KiB Cache, CHS=2434/255/63, UDMA(66)
Partition check:
hda: hda1 hda2 < hda5 hda6 >
Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077
Serial driver version 5.02 (2000-08-09) with MANY_PORTS MULTIPORT SHARE_IRQ SERIAL_PCI ISAPNP enabled
ttyS00 at 0x03f8 (irq = 4) is a 16550A
ttyS01 at 0x02f8 (irq = 3) is a 16550A
Real Time Clock Driver v1.10d
md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
md.c: sizeof(mdp_super_t) = 4096
autodetecting RAID arrays
autorun ...
... autorun DONE.
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
IP: routing cache hash table of 2048 buckets, 16Kbytes
TCP: Hash tables configured (established 16384 bind 16384)
Linux IP multicast router 0.06 plus PIM-SM
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
VFS: Mounted root (ext2 filesystem) readonly.
Freeing unused kernel memory: 236k freed
Adding Swap: 530104k swap-space (priority -1)
usb.c: registered new driver usbdevfs
usb.c: registered new driver hub
usb-uhci.c: $Revision: 1.251 $ time 20:53:29 Apr 8 2001
usb-uhci.c: High bandwidth mode enabled
PCI: Setting latency timer of device 00:1f.2 to 64
usb-uhci.c: USB UHCI at I/O 0xd000, IRQ 10
usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 1
hub.c: USB hub found
hub.c: 2 ports detected