Solved

tallylog file

Posted on 2015-02-17
2
3,459 Views
Last Modified: 2015-02-28
what is tallylog file?

How is it possible to have 52G? is it real size ?

[root@log]# df -h .

Filesystem            Size  Used Avail Use% Mounted on

/dev/mapper/vg00-var  4.0G  906M  2.9G  24% /var

[root@log]# ls -lh tallylog

-rw-------. 1 root root 52G Feb 17 12:20 tallylog

[root@log]# pwd

/var/log

[root@log]#
0
Comment
Question by:linuxperson
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 13

Expert Comment

by:Mark Bullock
ID: 40615875
Some ways to find out what this is:

Use head or tail to read the first few lines or last few lines. Add the -### switch to read as many lines as you like.

The less command also allows you to look through large files quickly.

You can find out if a process has it open with the list open files command.
lsof tallylog

To keep the file size manageable you can roll this log file every day and delete or compress older files. The logrotate program can do this.
0
 
LVL 21

Accepted Solution

by:
tfewster earned 500 total points
ID: 40616213
man pam_tally2:  tallylog is a log of (failed) logins and the pam_tally2 mechanism maintains a count of attempted accesses, can reset count on success, and can deny access if  too many attempts fail.

tallylog is a "sparse" file - the size is pre-allocated to reserve the space it thinks it may need, and if you have large UIDs (the numeric user ID), a lot of space is reserved. (If your UID is 1000000, space for uids 0-1000000 is reserved).

Most Linux utilities (e.g. du) report the actual space used correctly -

hostname:/var/log# ls -lh tallylog
-rw-------. 1 root root 626K Feb 10 15:13 tallylog
hostname:/var/log# du -sh tallylog
8.0K    tallylog

- but beware when backing up tallylog as some utilities may treat a sparse file incorrectly and fill in the "holes" with nulls.

A quick web-search for "tallylog sparse" brings up several useful references, such as
https://bugzilla.redhat.com/show_bug.cgi?id=771286

So, to use the classic line - It's not a bug, it's a feature!
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

In my business, I use the LTS (Long Term Support) versions of Linux. My workstations do real work, and so I rarely have the patience to deal with silly problems caused by an upgraded kernel that had experimental software on it to begin with from a r…
It’s 2016. Password authentication should be dead — or at least close to dying. But, unfortunately, it has not traversed Quagga stage yet. Using password authentication is like laundering hotel guest linens with a washboard — it’s Passé.
Learn how to get help with Linux/Unix bash shell commands. Use help to read help documents for built in bash shell commands.: Use man to interface with the online reference manuals for shell commands.: Use man to search man pages for unknown command…
This demo shows you how to set up the containerized NetScaler CPX with NetScaler Management and Analytics System in a non-routable Mesos/Marathon environment for use with Micro-Services applications.

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question