root登陆不上 普通用户可以

wangqiaolei

我的linux不能以root登陆  直接在机器上登的话提示 login incorrect
   用putty的话是access denied  
普通用户可以登陆  su的话会提示  user root does not exist

root的密码没错 一直没改
  
以下是系统
Linux server.redhat.org.cn 2.4.20-8 #1 Thu Mar 13 17:54:28 EST 2003 i686 i686 i386 GNU/Linux
硬件

00:00.0 Host bridge: Intel Corp. 440BX/ZX/DX - 82443BX/ZX/DX Host bridge (rev 01)
        Subsystem: VMWare Inc: Unknown device 1976
        Flags: bus master, medium devsel, latency 0
        Memory at ec000000 (32-bit, prefetchable) [size=64M]
        Capabilities: <available only to root>

00:01.0 PCI bridge: Intel Corp. 440BX/ZX/DX - 82443BX/ZX/DX AGP bridge (rev 01) (prog-if 00 [Normal decode])
        Flags: bus master, 66Mhz, medium devsel, latency 0
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=64

00:07.0 ISA bridge: Intel Corp. 82371AB/EB/MB PIIX4 ISA (rev 08)
        Subsystem: VMWare Inc: Unknown device 1976
        Flags: bus master, medium devsel, latency 0

00:07.1 IDE interface: Intel Corp. 82371AB/EB/MB PIIX4 IDE (rev 01) (prog-if 8a [Master SecP PriP])
        Subsystem: VMWare Inc: Unknown device 1976
        Flags: bus master, medium devsel, latency 64
        I/O ports at 1470

00:07.2 USB Controller: Intel Corp. 82371AB/EB/MB PIIX4 USB (prog-if 00 [UHCI])
        Subsystem: VMWare Inc: Unknown device 1976
        Flags: bus master, medium devsel, latency 64, IRQ 9
        I/O ports at 1060

00:07.3 Bridge: Intel Corp. 82371AB/EB/MB PIIX4 ACPI (rev 08)
        Subsystem: VMWare Inc: Unknown device 1976
        Flags: medium devsel, IRQ 9

00:0f.0 VGA compatible controller: VMWare Inc: Unknown device 0405 (prog-if 00 [VGA])
        Subsystem: VMWare Inc: Unknown device 0405
        Flags: medium devsel
        I/O ports at 1460
        Memory at f0000000 (32-bit, non-prefetchable) [size=128M]
        Memory at e8000000 (32-bit, non-prefetchable) [size=8M]
        Expansion ROM at <unassigned> [disabled] [size=32K]

00:10.0 SCSI storage controller: BusLogic BT-946C (BA80C30) [MultiMaster 10] (rev 01)
        Subsystem: BusLogic BT-946C (BA80C30) [MultiMaster 10]
        Flags: medium devsel, IRQ 11
        I/O ports at 1440
        Memory at e8800000 (32-bit, non-prefetchable)
        Expansion ROM at <unassigned> [disabled] [size=16K]

00:11.0 Ethernet controller: Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE] (rev 10)
        Subsystem: Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]
        Flags: bus master, medium devsel, latency 64, IRQ 10
        I/O ports at 1080 [size=128]
        Expansion ROM at <unassigned> [disabled] [size=64K]

00:12.0 Multimedia audio controller: Ensoniq ES1371 [AudioPCI-97] (rev 02)
        Subsystem: Ensoniq Creative Sound Blaster AudioPCI64V, AudioPCI128
        Flags: ?? devsel, IRQ 9
        I/O ports at 1400