12-12-2006
find first 100kb file and then "man dd"
9 More Discussions You Might Find Interesting
1. Solaris
Hello - I am finding difficulty in creating and allocating correct size to File Systems on solarix x86 box. Please see below contents I followed on screen and in the end It shows that /app file system is created of size 135GB , I wanted it to be 30gb as mentioned during 'format' command in 'Enter... (7 Replies)
Discussion started by: panchpan
7 Replies
2. Filesystems, Disks and Memory
Hi all,
I would like to ask on how to create 2MB partition on a Compact Flash card. It supposed to be of FAT12 type, and the CF capacity is 4GB. I try to do the partitioning and specify the size as 2MB but the partition editor automatically resize it to 8MB. I know that this is possible and the... (4 Replies)
Discussion started by: archayl
4 Replies
3. Shell Programming and Scripting
Hi
I am new to shell scripting.I want to create a batch file which creates a desired number of files with a specific size say 1MB each to consume space.How can i go about it using for loop /any other loop condition using shell script?
Thanks (3 Replies)
Discussion started by: swatideswal
3 Replies
4. UNIX for Advanced & Expert Users
asdfasdfasdfasdf??? (2 Replies)
Discussion started by: noorm
2 Replies
5. Shell Programming and Scripting
How could I go about creating some trash files to use for testing. All I need is for files to exist and the data in them really doesn't matter.
I need to do some work and testing with scripts and I don't want to mess with real data in my testing.
So I would like to generate say 10,000 files... (10 Replies)
Discussion started by: MrEddy
10 Replies
6. UNIX for Dummies Questions & Answers
Hello,
I have the following data set:
TRAIT DOSE
40 0.4
30 0.3
95 1.2
120 1.7
85 1.4
136 1.8
134 1.8
40 0.4
30 0.3
95 1.2
120 1.7
85 1.4
136 1.8
134 1.8
40 0.4
30 0.3
95 1.2 (2 Replies)
Discussion started by: wolf_blue
2 Replies
7. UNIX for Dummies Questions & Answers
Hello world,
I just learnt we can create a directory with custom size in a Linux server (say Redhat). Is it true? I'm asking because the only data (I can think of) a directory's inode holds is the files and 'sub-dir's. How can a new empty directory be of some required size? :wall:
PS : In... (2 Replies)
Discussion started by: satish51392111
2 Replies
8. UNIX for Dummies Questions & Answers
I want to have a string which has n blank spaces
For example
set N = 3
create str = " "
So the length depends on the value of N. I am in tcsh. (4 Replies)
Discussion started by: kristinu
4 Replies
9. UNIX for Beginners Questions & Answers
<Any suggestion how to create a file where the values are separated by ASCII code 1,with data extracted from a table using shell script The format is :/>
<columnname1(binary1)columnvalue(binary1)columnname2(binary1)columnvalue(binary1)columnname3(binary1)columnvalue... 1st row/>... (6 Replies)
Discussion started by: dasun
6 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