Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

Emptied log file is not working now

Posted on 2004-09-07
6
Medium Priority
?
254 Views
Last Modified: 2010-04-20
I'm quite new to linux, and was wondering what is the best way to empty / archive a log file.

The file in question is /var/log/messages

I tried:

mv /var/log/messages /var/log/messages.archive.07-09-2004
touch /var/log/messages    to create new empty log file

but now nothing is being written to the logfile! How can I fix this and how should I have done it?

Thanks.
0
Comment
Question by:mcwalters
[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
6 Comments
 
LVL 18

Expert Comment

by:liddler
ID: 11996864
0
 
LVL 18

Expert Comment

by:liddler
ID: 11997363
mcwalters
post a 0 pt Q in Community Support asking for a refund & delete of this Q, as it was answered in the other thread
0
 
LVL 24

Expert Comment

by:sciuriware
ID: 12003627
I have an answer to your question:
if the logfile is still open and you rename it or move it, the writing/appending still happens to the renamed file.
If you delete it or truncate it, the writing goes on to the file, virtual or on offset.
That's why the new logfile is ignored.
The right way is to have the writer reopen a new logfile or ....
... if loggings are not too frequent, the file may be opened-appended-closed on every logging.
Nowadays this approach is relatively cheap.

;JOOP!
0
Get your Disaster Recovery as a Service basics

Disaster Recovery as a Service is one go-to solution that revolutionizes DR planning. Implementing DRaaS could be an efficient process, easily accessible to non-DR experts. Learn about monitoring, testing, executing failovers and failbacks to ensure a "healthy" DR environment.

 
LVL 2

Accepted Solution

by:
Sunjith earned 150 total points
ID: 12007436
cat /dev/null > /var/log/messages
The above command will empty your log file quick and easy :-)
If you want to archive it, archive it before you empty:
Using bzip2:
bzip2 -k /var/log/messages
Or if you are using gzip:
gzip -c /var/log/messages > /var/log/messages.gz
Or if you want to use zip:
zip /var/log/messages.zip /var/log/messages
0
 

Author Comment

by:mcwalters
ID: 12007538
Thanks for the help guys.

I awarded the points already in another thread:
http://www.experts-exchange.com/Operating_Systems/Linux/Linux_Administration/Q_21121466.html

but will give these to you Sunjith as this will help me too :-)
0
 
LVL 2

Expert Comment

by:Sunjith
ID: 12007911
Thank you :-)
0

Featured Post

Learn Veeam advantages over legacy backup

Every day, more and more legacy backup customers switch to Veeam. Technologies designed for the client-server era cannot restore any IT service running in the hybrid cloud within seconds. Learn top Veeam advantages over legacy backup and get Veeam for the price of your renewal

Question has a verified solution.

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

The purpose of this article is to fix the unknown display problem in Linux Mint operating system. After installing the OS if you see Display monitor is not recognized then we can install "MESA" utilities to fix this problem or we can install additio…
In the first part of this tutorial we will cover the prerequisites for installing SQL Server vNext on Linux.
Learn how to find files with the shell using the find and locate commands. Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:
Learn how to navigate the file tree with the shell. Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…
Suggested Courses

610 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