Assuming your system will allow 100 concurrent file descriptors to be open at the same time:
Should work.
Per your description 3.txt will contain columns 1,2 and 3; 4.txt will contain 1,2 and 4. There will not be 1.txt nor 2.txt as you indicated you want n.txt where n is the column in addition to 1 and 2. I hope I interpreted that correctly.
---------- Post updated at 22:42 ---------- Previous update was at 22:39 ----------
If your system will not allow 100 concurrently open FDs, then the code below should work -- not as efficient, and you will need to delete all text files if you need to rerun the programme.
Last edited by agama; 10-21-2012 at 11:46 PM..
Reason: typo
I need to split a file based on certain context inside the file. Is there a unix command that can do this? I have looked into split and csplit but it does not seem like those would work because I need to split this file based on certain text. The file has multiple records and I need to split this... (1 Reply)
I'm trying to figure out how to do this efficiently with as little execution time as possible and I'm pretty sure using sed is the best way. However I'm new to sed and all the reading and examples I've found don't seem to show a similar exercise:
I have a long text file (i'll call it... (3 Replies)
I have a file that logs multiple sessions. What I would like to do is split this file inclusive of the lines that include "starting session" and "shutting down" and ignore the data before and after the beginning of the first session and the end of the last session. The output files can be called... (2 Replies)
To split the files
Hi,
I'm having a xml file with multiple xml header. so i want to split the file into multiple files.
Test.xml
---------
<?xml version="UTF_8">
<emp: ....>
<name>a</name>
<age>10</age>
</emp>
<?xml version="UTF_8">
<emp: ....>
<name>b</name>
<age>10</age>... (11 Replies)
Hi All,
I am new to this forumn as well to the UNIX, I have basic knowledge of UNIX which I studied some years ago, now I have to do some shell scripting to load data into Oracle database using sqlldr utility, whcih I am able to do. I have a requirement where I need to do following operation.
I... (10 Replies)
Hi,
I have a huge file with a single line.
But I want to break that line into lines of with each line having five columns.
My file is like this:
code:
"hi","there","how","are","you?","It","was","great","working","with","you.","hope","to","work","you."
I want it like this:
code:... (1 Reply)
Hi Friends ,
Please guide me with the code to extract multiple files from one file .
The File Looks like ( Suppose a file has 2 tables list ,column length may vary )
H..- > File Header....
H....- >Table 1 Header....
D....- > Table 1 Data....
T....- >Table 1 Trailer....
H..-> Table 2... (1 Reply)
Hi all,
Newbie here. First of all, sorry if I made any mistakes while posting this question in terms of rules. Correct me if I am wrong. :b:
I have a .dat file whose name is in the format of 20170311_abc_xyz.dat. The file consists of records whose first column consists of multiple dates in... (2 Replies)
Hello I have a file of following format
HDR 1234 abc qwerty
abc def ghi jkl
HDR 4567 xyz qwerty
abc def ghi jkl
HDR 890 mno qwerty
abc def ghi jkl
HDR 1234 abc qwerty
abc def ghi jkl
HDR 1234 abc qwerty
abc def ghi jkl
-Need to split this into multiple files based on tag... (8 Replies)
Discussion started by: wincrazy
8 Replies
LEARN ABOUT REDHAT
dos2unix
dos2unix(1) General Commands Manual dos2unix(1)NAME
dos2unix - DOS/MAC to UNIX text file format converter
SYNOPSYS
dos2unix [options] [-c convmode] [-o file ...] [-n infile outfile ...]
Options:
[-hkqV] [--help] [--keepdate] [--quiet] [--version]
DESCRIPTION
This manual page documents dos2unix, the program that converts plain text files in DOS/MAC format to UNIX format.
OPTIONS
The following options are available:
-h --help
Print online help.
-k --keepdate
Keep the date stamp of output file same as input file.
-q --quiet
Quiet mode. Suppress all warning and messages.
-V --version
Prints version information.
-c --convmode convmode
Sets conversion mode. Simulates dos2unix under SunOS.
-o --oldfile file ...
Old file mode. Convert the file and write output to it. The program default to run in this mode. Wildcard names may be used.
-n --newfile infile outfile ...
New file mode. Convert the infile and write output to outfile. File names must be given in pairs and wildcard names should NOT be
used or you WILL lost your files.
EXAMPLES
Get input from stdin and write output to stdout.
dos2unix
Convert and replace a.txt. Convert and replace b.txt.
dos2unix a.txt b.txt
dos2unix -o a.txt b.txt
Convert and replace a.txt in ASCII conversion mode. Convert and replace b.txt in ISO conversion mode. Convert c.txt from Mac to Unix
ascii format.
dos2unix a.txt -c iso b.txt
dos2unix -c ascii a.txt -c iso b.txt
dos2unix -c mac a.txt b.txt
Convert and replace a.txt while keeping original date stamp.
dos2unix -k a.txt
dos2unix -k -o a.txt
Convert a.txt and write to e.txt.
dos2unix -n a.txt e.txt
Convert a.txt and write to e.txt, keep date stamp of e.txt same as a.txt.
dos2unix -k -n a.txt e.txt
Convert and replace a.txt. Convert b.txt and write to e.txt.
dos2unix a.txt -n b.txt e.txt
dos2unix -o a.txt -n b.txt e.txt
Convert c.txt and write to e.txt. Convert and replace a.txt. Convert and replace b.txt. Convert d.txt and write to f.txt.
dos2unix -n c.txt e.txt -o a.txt b.txt -n d.txt f.txt
DIAGNOSTICS BUGS
The program does not work properly under MSDOS in stdio processing mode. If you know why is that so, please tell me.
AUTHORS
Benjamin Lin - <blin@socs.uts.edu.au>
Bernd Johannes Wuebben (mac2unix mode) <wuebben@kde.org>
MISCELLANY
Tested environment:
Linux 1.2.0 with GNU C 2.5.8
SunOS 4.1.3 with GNU C 2.6.3
MS-DOS 6.20 with Borland C++ 4.02
Suggestions and bug reports are welcome.
SEE ALSO unix2dos(1)mac2unix(1)1995.03.31 dos2unix v3.0 dos2unix(1)