Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Impacts of emptying /var/adm/wtmp file ?
Operating Systems AIX Impacts of emptying /var/adm/wtmp file ? Post 302319080 by bakunin on Saturday 23rd of May 2009 07:10:57 PM
Old 05-23-2009
candlejack is correct. Do not delete the file, because processes are accessing it. instead reduce it to zero length by issuing

Code:
cat /dev/null > /var/adm/wtmp

The difference is that this way the file will keep its inode and hence alle the processes accessing it will still find the file where they look for it.

If you delete the file and it is created anew it would most probably get a different inode, which is a potential hazard.

I hope this helps.

bakunin
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

HELP! The '/var/adm/message' file increase every few seconds???

Hi, guys, I have a big problem. I've got a sun solaris 4.1.4 workstation, and the /var/adm/message file will add one row every few seconds. It becomes a large file in a short time. I wander if there are some mistakes configuring the workstation. the /var/adm/message is as follow: ... (3 Replies)
Discussion started by: cloudsmell
3 Replies

2. Solaris

diff b/w /var/log/syslog and /var/adm/messages

hi sirs can u tell the difference between /var/log/syslogs and /var/adm/messages in my working place i am having two servers. in one servers messages file is empty and syslog file is going on increasing.. and in another servers message file is going on increasing but syslog file is... (2 Replies)
Discussion started by: tv.praveenkumar
2 Replies

3. Solaris

/var/adm/messages file rotation

I have a solaris 10 machine, lately I had a drive error issue so the dmesg command would show a screen full, now that the drive issue is resolved I want to have a fresh start for my #dmesg command output. The root cron looks like this The /etc/logadm.conf file has this entry If I manually... (2 Replies)
Discussion started by: Tirmazi
2 Replies

4. Solaris

/var/adm/meesages file empty

Do not know the reason y messages file is empty already restarted the syslog daemon but still its showing empty . xxxxxxx# more /var/adm/messages xxxxxx# # ps -efo zone,pid,ppid,time,comm | grep syslog | grep global global 11861 1 00:10 /usr/sbin/syslogd svcs... (2 Replies)
Discussion started by: fugitive
2 Replies

5. AIX

/var/adm/messages file is missing

Hi, The server is p570 with AIX@5300-10... The messages file is missing...how do I get it back and start logging the messages?? Can I just create the file again? (2 Replies)
Discussion started by: gkr747
2 Replies

6. Solaris

/var/adm & /var/sadm

what is the difference between tha /var/adm and /var/sadm files in solaris 10 Os please can any one respond quickly thanking you (2 Replies)
Discussion started by: wkbn86
2 Replies

7. AIX

/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... (2 Replies)
Discussion started by: robroy
2 Replies

8. Solaris

Difference between /var/log/syslog and /var/adm/messages

Hi, Is the contents in /var/log/syslog and /var/adm/messages are same?? Regards (3 Replies)
Discussion started by: vks47
3 Replies

9. AIX

ftpd failed to write /var/adm/wtmp not owner

dear all this attached photo is send to me from Arcsight admin can you please advice ftpd failed to write /var/adm/wtmp not owner ftpd failed to write /var/adm/wtmp error 0 (1 Reply)
Discussion started by: thecobra151
1 Replies

10. UNIX for Advanced & Expert Users

Not logging ftp connections in /var/adm/wtmpx file (in last command output)

Hi all, I have F5 load balancer on my system and checking service status by opening an ftp session in every 30 seconds. These ftp sessions are being logged in /var/adm/wtmpx and filling up the file. when i run the last command most of the output is this ftp session. I was wondering if there is a... (1 Reply)
Discussion started by: cepxat
1 Replies

LEARN ABOUT BSD

ac

AC(8)							      System Manager's Manual							     AC(8)

NAME

       ac - login accounting

SYNOPSIS

       /usr/sbin/ac [ -w wtmp ] [ -p ] [ -d ] [ people ] ...

DESCRIPTION

       Ac  produces a printout giving connect time for each user who has logged in during the life of the current wtmp file.  A total is also pro-
       duced.  -w is used to specify an alternate wtmp file.  -p prints individual totals; without this  option,  only	totals	are  printed.	-d
       causes  a printout for each midnight to midnight period.  Any people will limit the printout to only the specified login names.	If no wtmp
       file is given, /usr/adm/wtmp is used.

       The accounting file /usr/adm/wtmp is maintained by init and login.  Neither of these programs creates the file, so if it does not exist	no
       connect-time  accounting  is  done.  To start accounting, it should be created with length 0.  On the other hand if the file is left undis-
       turbed it will grow without bound, so periodically any information desired should be collected and the file truncated.

FILES

       /usr/adm/wtmp

SEE ALSO

       init(8), sa(8), login(1), utmp(5).

4th Berkeley Distribution					 November 16, 1996							     AC(8)
All times are GMT -4. The time now is 08:13 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy