|
|
Sponsored Content
Top Forums
UNIX for Dummies Questions & Answers
delete all lines in file
Post 17145 by mikek147 on Monday 11th of March 2002 05:23:03 PM
03-11-2002
|
|
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
what am trying to do is delete a line in a specific file but I dont know what to do. I cant use the sed or awk commands because these commands dont really alter the original file. they only alter what they display on the screen
by the way, am trying to do this from a script so if anybody can... (5 Replies)
Discussion started by: TRUEST
5 Replies
2. Shell Programming and Scripting
I have a file which has about 500K records and I need to delete about 50 records from the file. I know line numbers and am using
sed '13456,13457,......d' filename > new file.
It does not seem to be working.
Any help will greatly appreciated. (5 Replies)
Discussion started by: oracle8
5 Replies
3. Shell Programming and Scripting
i have two files & want to delete the lines from 2nd file which matches with 1st file (2 Replies)
Discussion started by: sameersam
2 Replies
4. Shell Programming and Scripting
Hello!!!
how can I delete the last n lines of a file???
Thanks (7 Replies)
Discussion started by: ncatdesigner
7 Replies
5. Shell Programming and Scripting
Input:
a
b
b
c
d
d
I need:
a
c
I know how to get this (the lines that have duplicates) :
b
d
sort file | uniq -d
But i need opossite of this. I have searched the forum and other places as well, but have found solution for everything except this variant of the problem. (3 Replies)
Discussion started by: necroman08
3 Replies
6. UNIX for Dummies Questions & Answers
Hiiii
I have a file which contains huge data as
a.dat:
PDE 1990 1 9 18 51 28.90 24.7500 95.2800 118.0 6.1 0.0 BURMA
event name: 010990D
time shift: 7.3000
half duration: 5.0000
latitude: 24.4200
longitude: 94.9500
depth: 129.6000
Mrr: ... (7 Replies)
Discussion started by: reva
7 Replies
7. UNIX for Advanced & Expert Users
Hi All,
I have a very huge file (4GB) which has duplicate lines. I want to delete duplicate lines leaving unique lines. Sort, uniq, awk '!x++' are not working as its running out of buffer space.
I dont know if this works : I want to read each line of the File in a For Loop, and want to... (16 Replies)
Discussion started by: krishnix
16 Replies
8. UNIX for Dummies Questions & Answers
Hi
This is a sample of my data file.
##field PH01000000 1 4869017
#PH01000000G0240
WWW278545G0240 P.he_model_v1.0 erine 119238 121805 . - . ID=PH01000000G0240;Description="zinc finger, C3HC4 type domain containing protein, expressed"... (7 Replies)
Discussion started by: sonia102
7 Replies
9. Shell Programming and Scripting
Hello,
I have file of more than 10000 lines.
I want to delete 40 lines after every 20 lines.
e.g from a huge file, i want to delete line no from 34 - 74, then 94 - 134 etc and so on.
Please let me know how i can do it.
Best regards, (11 Replies)
Discussion started by: nehashine
11 Replies
10. UNIX for Beginners Questions & Answers
Hi,
I have a txt document having a format like this:
DATA1 | DATA2 | DATA3 | 23-JAN-20 23:41:34
DATA1 | DATA2 | DATA3 | 23-JAN-20 23:41:32
DATA1 | DATA2 | DATA3 | 23-JAN-20 23:41:30
...
DATA1 | DATA2 | DATA3 | 23-JAN-20 22:35:31
DATA1 | DATA2 | DATA3 | 23-JAN-20 22:30:34
DATA1 | DATA2 |... (1 Reply)
Discussion started by: gc_sw
1 Replies
LEARN ABOUT REDHAT
mac2unix
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)