PROBLEM: Linux does not recognice more then 39000 Users

Uwe Solleder (us@msdnet.de)
Thu, 30 Sep 1999 16:14:23 +0200


[1.] One line summary of the problem:
Linux does not recognice more than 39000 users

[2.] Full description of the problem/report:
We are running a freemail-server on a Linux-box. Everything worked fine
until there were less than 38999 user registrated on that system.
Since the 39000th user where added, he isn't recogniced by the system. He
was added with useradd, is included in /etc/passwd:

layla:x:39198:100:Mailbenutzer:/home/layla:/bin/bash

and /etc/shadow:

layla:fmgr0xGXTE5ns:10864:0:99999:7:0::

but, if we want to change his password with passwd there is the message:

mail:/etc # passwd layla
passwd: Unknown user layla
mail:/etc #

[3.] Keywords (i.e., modules, networking, kernel):
-

[4.] Kernel version (from /proc/version):
Linux version 2.2.10 (root@mail) (gcc version egcs-2.91.66 19990314/Linux
(egcs-1.1.2 release)) #1 SMP Thu Sep 30 05:05:36 MEST 1999

[5.] Output of Oops.. message (if applicable) with symbolic information
resolved (see Documentation/oops-tracing.txt)
-

[6.] A small shell script or example program which triggers the
problem (if possible)
-

[7.] Environment
[7.1.] Software (add the output of the ver_linux script here)
Linux mail 2.2.10 #1 SMP Thu Sep 30 05:05:36 MEST 1999 i686 unknown
Kernel modules 2.2.2-pre6
Gnu C egcs-2.91.66
Binutils 2.9.1.0.25
Linux C Library x 1 root root 4190668 Jul 22 23:29
/lib/libc.so.6
Dynamic linker ldd (GNU libc) 2.1.1
Procps 1.2.11
Mount 2.9t
Net-tools 1.52
Kbd 0.99
Sh-utils 1.16
Modules Loaded 3c59x serial memstat
[7.2.] Processor information (from /proc/cpuinfo):
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : 00/07
stepping : 3
cpu MHz : 451.030551
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 mmx osfxsr kni
bogomips : 450.56

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : 00/07
stepping : 3
cpu MHz : 451.030551
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 mmx osfxsr kni
bogomips : 448.92

[7.3.] Module information (from /proc/modules):
3c59x 17388 1 (autoclean)
serial 41940 0 (autoclean)
memstat 1412 0 (unused)

[7.4.] SCSI information (from /proc/scsi/scsi)
Attached devices:
Host: scsi0 Channel: 00 Id: 01 Lun: 00
Vendor: TOSHIBA Model: CD-ROM XM-6201TA Rev: 1037
Type: CD-ROM ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 06 Lun: 00
Vendor: IBM Model: DDRS-34560D Rev: DC1B
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 08 Lun: 00
Vendor: IFT Model: 3102 Rev: 0212
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 08 Lun: 01
Vendor: IFT Model: 3102 Rev: 0212
Type: Unknown ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 08 Lun: 02
Vendor: IFT Model: 3102 Rev: 0212
Type: Unknown ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 08 Lun: 03
Vendor: IFT Model: 3102 Rev: 0212
Type: Unknown ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 08 Lun: 04
Vendor: IFT Model: 3102 Rev: 0212
Type: Unknown ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 08 Lun: 05
Vendor: IFT Model: 3102 Rev: 0212
Type: Unknown ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 08 Lun: 06
Vendor: IFT Model: 3102 Rev: 0212
Type: Unknown ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 08 Lun: 07
Vendor: IFT Model: 3102 Rev: 0212
Type: Unknown ANSI SCSI revision: 02

[7.5.] Other information that might be relevant to the problem
(please look in /proc and include all information that you
think to be relevant):
/proc/filesystems:
ext2
minix
umsdos
msdos
vfat
nodev proc
nodev nfs
iso9660
hpfs
nodev devpts

[X.] Other notes, patches, fixes, workarounds:

Thank for answering and

Greetings from Germany

Uwe
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Tel.: +49 (2 11) 31 16 08-0
Fax: +49 (2 11) 31 16 08-19
eMail: info@msdnet.de
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