|
|
Sponsored Content
Operating Systems
Linux
Get a specific line number from a text file
Post 302440647 by bankai on Tuesday 27th of July 2010 11:37:59 PM
|
|
10 More Discussions You Might Find Interesting
1. Programming
hi everybody!
i need to read a specific line from a text file using C. can any one suggest how to do it.
i m aware abt fread(), fwrite(), fseek()... but using these allows the pointer to be moved 1 character at a time. Is there a way i could jump directly to a line if i know the line number?... (4 Replies)
Discussion started by: mridula
4 Replies
2. Shell Programming and Scripting
Hi,
I have a huge file & I want to add a specific text in column. But I want to add this text from a specific line number to a specific line number & another text in to another range of line numbers.
To be more specific: lets say my file has 1000 lines & 4 Columns. I want to add text "Hello"... (2 Replies)
Discussion started by: Ezy
2 Replies
3. Shell Programming and Scripting
Hi,
I wanted to add specific text to each row in a text file containing three rows. Example:
0 8 7 6 5 5
7 8 9 0 7 9
7 8 9 0 1 2
And I want to add a 21 at the beginning of the first row, and blank spaces at the beginning of the second two rows. To get this:
21 0 8 7 6 5 5
7 8... (4 Replies)
Discussion started by: hertingm
4 Replies
4. Shell Programming and Scripting
Hi
I want to extract certain text between two line numbers like
23234234324 and
54446655567567
How do I do this with a simple sed or awk command?
Thank you.
---------- Post updated at 06:16 PM ---------- Previous update was at 05:55 PM ----------
found it:
sed -n '#1,#2p'... (1 Reply)
Discussion started by: return_user
1 Replies
5. UNIX for Dummies Questions & Answers
Hi all, I have a script which uses a basic line to add text into another file e.g.
grep -i test * >> test.txt
Is there a way I can get the output of the grep to output to a specific line in the text.txt for example output above the line starting "Bottom line..." (6 Replies)
Discussion started by: JayC89
6 Replies
6. UNIX for Dummies Questions & Answers
My project is to get a temperature reading from a refridgerator every 2 minutes and check to see if the door has been left open.
I don't yet have the mastery of Linux, being a complete noob, but I reckon I need a text file with the latest temperature reading in it. This I've managed to do by... (2 Replies)
Discussion started by: Fitch
2 Replies
7. UNIX for Dummies Questions & Answers
I have this space delimited large text file with more than 1,000,000+ columns and about 100 rows. I want to delete all the cells that consist of just 2 (leave 2's that are not by themselves intact):
File before modification
aa bb cc 2 NA100 dd
aa b1 c2 2 NA102 de
File after modification... (1 Reply)
Discussion started by: evelibertine
1 Replies
8. Shell Programming and Scripting
dear all,
i need your advice
i have sample script like this:
testing.sh
for i in {1..10}
do
echo testing $i
done
but i forgot create "#!/bin/bash" in above "for"
so i want output will like this
testing.sh
#!/bin/bash
for i in {1..10}
do
echo testing $i
done (2 Replies)
Discussion started by: zvtral
2 Replies
9. Shell Programming and Scripting
Hi
This is my first post and I'm just a beginner. So please be nice to me.
I have a couple of html files where a pattern beginning with "http://www.site.com" and ending with "/resource.dat" is present on every 241st line. How do I extract this to a new text file?
I have tried sed -n 241,241p... (13 Replies)
Discussion started by: dejavo
13 Replies
10. Shell Programming and Scripting
Hi guys,
I am running a while loop in a script ro read a file line by line.
Now I want to run a grep only on the lines below the line I am that is being read by the while loop.
Eg:
If my while loop is on line 4 of the file, the grep only runs below line 4 and does not include line 1,2... (3 Replies)
Discussion started by: Junaid Subhani
3 Replies
LEARN ABOUT BSD
zgrep
ZGREP(1) General Commands Manual ZGREP(1) NAME
zgrep - search possibly compressed files for a regular expression SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename... DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code: (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep. If the GREP environment variable is set, zgrep uses it as the grep program to be invoked. EXIT CODE
2 - An option that is not supported was specified. AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1) ZGREP(1)