A way to delete specific lines Post: 302472331

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1. Programming

Delete specific lines in a text file

Hi, experts, I would like to create a function that can calculate the total number of lines in a saved text file and delete specific lines in that particular file (I only want the last few lines). Hav anybody have the experience and giv me a hand in this?

2. UNIX for Advanced & Expert Users

How to delete specific lines at the same time

Dear All I have a pattern which look like this: 2 20080312_10:55:35.800 Spain-Telefonica ISC 9 IAM 927535957 34670505334 f 275 COT b 700 ACM b 6577 CPG b 10726 ANM b 202195 REL f 202307 RLC :COMMA: NCI=15,FCI=2101,CPC=0A,TMR=00,USI,OFI=00: :COMMB: BCI=0214,OBI=01,ACT: :RELCAUSE:10: This...

3. Shell Programming and Scripting

delete lines containing a specific word in afile

Hi, Please suggest how to write a shell script which delets all the lines containing the word unix in the files supplied as argument in the shell.

4. Shell Programming and Scripting

Delete specific lines from a file

Hi, I have a file ( all_users.ldif ) of the following format: cn=orcladmin, cn=Users, dc=maximus,dc=com cn=PUBLIC, cn=Users, dc=maximus,dc=com cn=portal,cn=users,dc=maximus,dc=com cn=portal_admin,cn=users,dc=maximus,dc=com cn=uddi_publisher,cn=Users,dc=maximus,dc=com...

5. Shell Programming and Scripting

How to delete all lines before a specific word?

Let's say we have a file containing: alllllsadfsdasdf qwdDDDaassss ccxxcxc#2222 dssSSSSddDDDD D1Sqn2NYOHgTI Hello Alex ssS@3 Ok, and let's say we want to delete all words from D1Sqn2NYOHgTI and back, this means to delete the words (and the lines of them) : alllllsadfsdasdf...

6. Shell Programming and Scripting

Delete all lines after a specific line ?

Hello. My file is like this: a b c d e f g h i I want to delete all lines after the 3rd line, means after the "c". Is there any way to do this? The lines differ between them and the lines I want to delete does not have a specific word, or the lines I want to keep (a,b,c) does not have a...

7. Shell Programming and Scripting

Delete multiple lines starting with a specific pattern

Hi, just tried some script, awk, sed for the last 2 hours and now need help. Let's say I have a huge file of 800,000 lines like this : It's a tedious job to look through it, I'd like to remove those useless lines in it as there's a few thousands : Or to be even more precise : if line1 =...

8. UNIX for Dummies Questions & Answers

How to delete specific lines (2n+3 line, n=0,1,2...296) in a file?

Dear everyone, I have a file with 900 lines (there is only numbers in one line, no string), I only need the lines 2+3n (n=0,1...296), i.e line 2, 5, 8, 11...888. I tried google but only the results such as how to delete all the odd lines or all the even lines with 'awk' command. Thanks in...

9. Shell Programming and Scripting

How to delete lines starting with specific string?

Dear all, I would like to delete even lines starting with "N" together with their respective titles which are actually odd lines. Below is the example of input file. I would like to remove line 8 and 12 together with its title line, i.e., line 7 and 11, respectively....

10. Shell Programming and Scripting

Delete lines above and below specific line of text

I'm trying to remove a specific number of lines, above and below a specific line of text, highlighted in red: <STMTTRN> <TRNTYPE>CREDIT <DTPOSTED>20151205000001 <TRNAMT>10 <FITID>667800001 <CHECKNUM>667800001 <MEMO>BALANCE </STMTTRN> <STMTTRN> <TRNTYPE>DEBIT <DTPOSTED>20151207000001...

LEARN ABOUT LINUX

ppmtopgm

ppmtopgm(1)						      General Commands Manual						       ppmtopgm(1)

NAME

       ppmtopgm - convert a portable pixmap into a portable graymap

SYNOPSIS

       ppmtopgm [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as  input.  Produces a portable graymap as output.  The output is a "black and white" rendering of the original
       image, as in a black and white photograph.  The quantization formula used is .299 r + .587 g + .114 b.

       Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any  ppm  program  can
       read  pgm  (and	pbm  ) files automatically.  pgmtoppm is for colorizing a pgm file.  Also, see ppmtorgb3 for a different way of converting
       color to gray.  And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate  the  original
       colors, not necessarily a way that looks like a black and white photograph.

QUOTE

       Cold-hearted orb that rules the night
       Removes the colors from our sight
       Red is gray, and yellow white
       But we decide which is right
       And which is a quantization error.

SEE ALSO

       pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

								   10 April 2000						       ppmtopgm(1)