You've got to give us some more information on how you truncate the file, what kind of link you use, and what and how another application might write into that file, because I can't yet reproduce that behaviour
Hi,
Following are the steps which we follow :-
1) a log file is generated through the redirection of Jboss' run.sh
2)the above log file abc.log is then linked via :-
3) Every night a copy of the log file in ROOT is made and the original one is truncated :-
After step 3, a new binary line is found as the first line of the truncated file
So a few points :-
1) the log file is being written by JBoss
2) linking is not via "-s"
Hi
I have a file in which I have 5 columns which are delimited by “|” as shown
ABC|12|YAK|METRIC|000000019.5
XYZ|10|ABX|META|000000002.5
Now my requirement is to take the last column trim the leading zero's for that column values and write back to the same file in the same... (7 Replies)
HI I HAVE A PROBLEM,MY SOURCE FILE IS OF PATTERN
S1,E-Certified,29,29,2.7,Certified,4,3,2.7,,0,0,0
S2,Certified,4,3,2.7,,0,0,0,,0
S3,E-Certified,29,29,2.7,,0,0,0
S4,,0,0,0,,0,0,0,,0,0,0,,0,0,0
AND THE EXPECTED OUTPUT IS
S1,E-Certified,29,29,2.7
S1,Certified,4,3,2.7... (1 Reply)
Hi champs!
I have a fixed width file in which the records appear like this
11111 <fixed spaces such as 6> description for 11111 <fixed spaces such as 6> some more field to the record of 11111
22222 <fixed spaces such as 6> description for 22222 <fixed spaces such as 6> some more field to the... (8 Replies)
Hi,
I need to truncate a file based on date.Suppose i have a log file which is getting updated every date,i need to keep 7 days worth of data(like sysdate-7) and rest i want to truncate it.Can some help me? (5 Replies)
sed 's|^xyz.abc *= *.*|xyz.abc=60|' /test/myFile.properties > /test/myFile.properties1
myFile.properties has the last line as xyz.abc=23 does not end with newline.
When I run this command the last line is truncated if there is no newline character at EOF. Looking for an alternative here. (1 Reply)
There is a same named log file that I have on my 2 different android phones. When I plug it into my computer, it appears in the media folder, For example the first android phone:
/media/F6BA-0AF5/folder/A.log
I want to put that into a variable to be manipulated.... (3 Replies)
consider the small piece of code
while read line
do
echo $line
done < example
content of example file
sadasdasdasdsa erwerewrwr ergdgdfgf rgerg erwererwr
the output is like
sadasdasdasdsa erwerewrwr ergdgdfgf rgerg erwererwr
the... (4 Replies)
Hi,
I have a Unix mail file that I need to truncate, based on the date of the messages. For those not familiar with the format, it is a single file for each user, with the first line of the mail message looking like the following:
From user@sitename.com Thu Apr 21 05:40:33 2011
Each... (3 Replies)
Hello *nix specialists,
Im working for a non profit organisation in Germany to transport DSL over WLAN to people in areas without no DSL. We are using Linksys WRT 54 router with DD-WRT firmware There are at the moment over 180 router running but we have to change some settings next time. So my... (7 Replies)
Hi all,
I need help for solve my problem.
my problem is like this..
i want to add many word to file. but after I add 1 word, the second word should be in the under of the first word.
i have tried but the result is like this
word1word2word3
i want the result to be like this
word1
word2... (5 Replies)
Discussion started by: weslyarfan
5 Replies
LEARN ABOUT FREEBSD
truncate
TRUNCATE(1) BSD General Commands Manual TRUNCATE(1)NAME
truncate -- truncate or extend the length of files
SYNOPSIS
truncate [-c] -s [+|-]size[K|k|M|m|G|g|T|t] file ...
truncate [-c] -r rfile file ...
DESCRIPTION
The truncate utility adjusts the length of each regular file given on the command-line.
The following options are available:
-c Do not create files if they do not exist. The truncate utility does not treat this as an error. No error messages are displayed and
the exit value is not affected.
-r rfile
Truncate or extend files to the length of the file rfile.
-s [+|-]size[K|k|M|m|G|g|T|t]
If the size argument is preceded by a plus sign (+), files will be extended by this number of bytes. If the size argument is pre-
ceded by a dash (-), file lengths will be reduced by no more than this number of bytes, to a minimum length of zero bytes. Other-
wise, the size argument specifies an absolute length to which all files should be extended or reduced as appropriate.
The size argument may be suffixed with one of K, M, G or T (either upper or lower case) to indicate a multiple of Kilobytes,
Megabytes, Gigabytes or Terabytes respectively.
Exactly one of the -r and -s options must be specified.
If a file is made smaller, its extra data is lost. If a file is made larger, it will be extended as if by writing bytes with the value zero.
If the file does not exist, it is created unless the -c option is specified.
Note that, while truncating a file causes space on disk to be freed, extending a file does not cause space to be allocated. To extend a file
and actually allocate the space, it is necessary to explicitly write data to it, using (for example) the shell's '>>' redirection syntax, or
dd(1).
EXIT STATUS
The truncate utility exits 0 on success, and >0 if an error occurs. If the operation fails for an argument, truncate will issue a diagnostic
and continue processing the remaining arguments.
SEE ALSO dd(1), touch(1), truncate(2)STANDARDS
The truncate utility conforms to no known standards.
HISTORY
The truncate utility first appeared in FreeBSD 4.2.
AUTHORS
The truncate utility was written by Sheldon Hearn <sheldonh@starjuice.net>.
BSD December 19, 2006 BSD