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)

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)

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)

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)

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)

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)

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)

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)

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)

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)