Truncate Log files

Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Truncate Log files
# 8  
Old 11-14-2009

Sed on Solaris doesn't support -i - that's far too modern! Come to think of it, I don't think any / many UNIX's support it. And --help doesn't work either.

Perhaps you could use the original solution, but use cp instead of mv:
tail -b number_of_ blocks_to_save /var/adm/messages > /var/tmp/messages  
cp /var/tmp/messages /var/adm/messages && rm /var/tmp/messages

(the file will retain its inode number and permissions, unlike with mv)

Or truncate the file using
> /var/adm/messages

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Redirecting log files to null writing junk into log files

Redirecting log files to null writing junk into log files. i have log files which created from below command exec <processname> >$logfile but when it reaches some size i am redirecting to null while process is running like >$logfile manually but after that it writes some junk into... (7 Replies)
Discussion started by: greenworld123
7 Replies

2. Shell Programming and Scripting

Script to truncate wtmp files

Hi, Does anyone have a script to truncate the wtmp file. I want to move older entries in the wtmp to a new file and move it out of var/adm and shrink the size. (4 Replies)
Discussion started by: ElizabethPJ
4 Replies

3. Shell Programming and Scripting

Truncate table

Hi In unix able to connect to oracle database and create table ,when rerun ,if table exist ,truncate that table.Any idea how to do that ---- sqlplus -s datadmin/password <<EOF create table xx(col1 number, col2... ); exit; EOF I... (1 Reply)
Discussion started by: mohan705
1 Replies

4. UNIX for Dummies Questions & Answers

How can i truncate filenmes?

I am using FC6 just in case it matters, though i hope it doesn't. If i have a file or some files that i want to truncate the filename of, so that it is only a certain number of characters in length, how would i do that on the command line? Also, just to make it more interesting, say i... (11 Replies)
Discussion started by: Calum
11 Replies

5. Shell Programming and Scripting

ksh - truncate a log in place, sed -i not available captain!

Hi there:) Because of security requirements, It would be much better if I could truncate my logs in place using sed -i (or ?). I cant use the -i option on sed in my environment. Can anyone help a DBA? (5 Replies)
Discussion started by: quigley007
5 Replies

6. UNIX for Advanced & Expert Users

*** Truncate certain field ***

I have a file in which I need to truncate 15th field to have only one character like Put --> P and if i have no value in 15th field, it should be "O" (Other) would really appreciate the reponses, thnx in advance:b: (2 Replies)
Discussion started by: sannmayaz
2 Replies

7. Shell Programming and Scripting

Truncate File contain

I have one file which first line is blank and second line has some data. $cat filename output: 30-MAY-07 I want to store 30-MAY-07 value in one variable. for that I wrote var="`head -2 filename`" It will give that result but I want to truncate the first line which is blank. plz help. (2 Replies)
Discussion started by: rinku
2 Replies

8. Shell Programming and Scripting

How to truncate as filesize?

Hello everybody it's me again. I have a procces that is writing in a 'file1' automatically but i want to truncate 'file1' to a filesize 'x' that mean if the 'file1' size is 'x' i want to delete the first lines while the last lines are being writed, that have sence? in the process are an... (1 Reply)
Discussion started by: Lestat
1 Replies

9. UNIX for Dummies Questions & Answers

truncate wtmp

I have AIX5.1 I have been trying to learn how to truncate the /var/adm/wtmp file. I have seen several things on google actually but don't quite understand. I also searched your forums but couldn't find it. one says this ">/var/adm/wtmp Is that all I do? I have a seperate question also. I was... (1 Reply)
Discussion started by: rocker40
1 Replies

10. UNIX for Dummies Questions & Answers

Truncate what is It?

what does this command do ? as in does this command just make sure everything in the file is executed? or does it flush the file? Actually this is used on a file in a progress database but I believe it is a unix command? (2 Replies)
Discussion started by: rocker40
2 Replies
Login or Register to Ask a Question
Log(4)							     Kernel Interfaces Manual							    Log(4)

Log, .Log - Contains the uucp program log files SYNOPSIS
/usr/spool/uucp/.Log DESCRIPTION
The /usr/spool/uucp/.Log directories contain uucp program log files. The uucp program normally places status information about each trans- action in the appropriate log file each time you use the networking utilities facility. All transactions of the uucico and uuxqt daemons are logged in files named for the remote system concerned. The files are stored in a subdirectory of the /usr/spool/uucp/.Log directory named for the daemon involved. Thus, the log files are named with a form of the following: /usr/spool/uucp/.Log/DaemonName/SystemName The uucp and uuto commands call the uucico daemon. The uucico daemon activities for a particular remote system are logged in the System- Name file in the /usr/spool/uucp/.Log/uucico directory on the local system. The uux and uusend commands call the uuxqt daemon. The uuxqt daemon activities for a particular remote system are logged in the SystemName file in the /usr/spool/uucp/.Log/uuxqt directory on the local system. When more than one uucp process is running, however, the system cannot access the standard log file, so it places the status information in a file with a .Log prefix that covers just the single transaction. The uucp program can automatically append the temporary log files to a primary log file. This is called compacting the log files, and is handled by the uudemon.cleanu command, a shell procedure, which combines the log files of the activities of the uucico and uuxqt daemons on a system and stores them in the /usr/spool/uucp/.Old directory. The default is for the uudemon.cleanu command to save log files that are 2 days old. This default can be changed by modifying the appro- priate line in the shell script. If storage space is a problem on a particular system, reduce the number of days that the files are kept in the individual log files. The uulog command can be used to view the uucp program log files. RELATED INFORMATION
Daemons: cron, uucico(8), uusched(8) Commands: uucp(1), uudemon.cleanu(4), uulog(1), uusend(1), uuto(1), uux(1) delim off Log(4)