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Operating Systems
AIX
/var/adm/wtmp - few entries & huge size.
Post 302481820 by robroy on Monday 20th of December 2010 03:44:09 AM
12-20-2010
/var/adm/wtmp - few entries & huge size.
Hi all.
I have a strange case on one of my AIX boxes. /var/adm/wtmp on server01 is ~ 400MB large but it only has ~1200 lines. For example on server02 there are ~85000 lines and the file is ~158MB large. I check lines through 'last | wc -l'. But when I check line directly with 'wc -l /var/adm/wtmp' for server01 I have 22483 lines and for server02 10575 lines. Quite strange for me
What should be checked? Where is the strange difference comming from?
I have a strange case on one of my AIX boxes. /var/adm/wtmp on server01 is ~ 400MB large but it only has ~1200 lines. For example on server02 there are ~85000 lines and the file is ~158MB large. I check lines through 'last | wc -l'. But when I check line directly with 'wc -l /var/adm/wtmp' for server01 I have 22483 lines and for server02 10575 lines. Quite strange for me
What should be checked? Where is the strange difference comming from?
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LEARN ABOUT SUSE
wtmpx
utmpx(4) File Formats utmpx(4) NAME
utmpx, wtmpx - utmpx and wtmpx database entry formats SYNOPSIS
#include <utmpx.h> /var/adm/utmpx /var/adm/wtmpx DESCRIPTION
The utmpx and wtmpx files are extended database files that have superseded the obsolete utmp and wtmp database files. The utmpx database contains user access and accounting information for commands such as who(1), write(1), and login(1). The wtmpx database contains the history of user access and accounting information for the utmpx database. USAGE
Applications should not access these databases directly, but should use the functions described on the getutxent(3C) manual page to inter- act with the utmpx and wtmpx databases to ensure that they are maintained consistently. FILES
/var/adm/utmpx user access and adminstration information /var/adm/wtmpx history of user access and adminstrative information SEE ALSO
getutxent(3C), wait(3C)wait.h(3HEAD) SunOS 5.10 22 Feb 1999 utmpx(4)