Sponsored Content
Full Discussion: remove lines from file
Top Forums Shell Programming and Scripting remove lines from file Post 302297833 by lweegp on Sunday 15th of March 2009 11:07:57 PM
Old 03-16-2009
hi vidyadhar85,

thanks for the explaination Smilie

so what you recommend is to move the first 100000 lines to file1 and the remaining lines to temp file and use the temp file to overwrite the existing huge file. is that right?


wee
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

remove lines from file

file: 1 xxxxxxx 2 xxx xxx 5 xxx xxx ... 180 xxxxxx 200 xxx how to remove any lines with the first number range 1-180 (9 Replies)
Discussion started by: bluemoon1
9 Replies

2. Shell Programming and Scripting

To remove the lines in my file

Hi, There seems to some hack attempts in my site. I have attached the index page of my site and I need to remove the below lines from the index page. The below lines are at the center of the file. --> </style> <script>E V A L( unescape(... (5 Replies)
Discussion started by: gsiva
5 Replies

3. UNIX for Dummies Questions & Answers

vi to remove lines in file

All, I have a text file with several entries like below: personname personname.domain.com I know there is a way to use vi to remove only the personname.domain.com line. Can someone help? I believe that it involves /s/g/ something...I just can't remember the exact syntax. Thanks (2 Replies)
Discussion started by: kjbaumann
2 Replies

4. Shell Programming and Scripting

remove : lines from file

A small question I have a test.txt file I have contents as: a:google b:yahoo : c:facebook : d:hotmail How do I remove the line with : my output should be a:google b:yahoo c:facebook d:hotmail (5 Replies)
Discussion started by: aronmelon
5 Replies

5. Shell Programming and Scripting

Remove lines from file

Hey Gang- I have a list of servers. I want to exclude servers that begin with and end with certain characters. Is there an easy command to do this? Example wvm1234dev wvm1234pro uvm1122dev uvm1122bku uvm1344dev I want to exclude any lines that start with "wvm" OR "uvm" AND end... (7 Replies)
Discussion started by: idiotboy
7 Replies

6. Shell Programming and Scripting

Remove last 4 lines of a file

Hi, I have a file from which I need to remove the last n lines. I was successful in removing only the last line using : sed '$d' file_name Could you please help me with the command. Thanks, H2 Please use code tags when posting data and code samples! (8 Replies)
Discussion started by: H squared
8 Replies

7. UNIX for Dummies Questions & Answers

Want to remove all lines but not latest 50 lines from a file

Hi, I have a huge file which has Lacs of lines. File system got full. I want your guys help to suggest me a solution so that I can remove all lines from that file but not last 50,000 lines. I want solution which can remove lines from existing file so that I can have some space left with. (28 Replies)
Discussion started by: prashant2507198
28 Replies

8. Shell Programming and Scripting

Remove lines in file

I have a file that contains the following: Party_Id1;Party_id2;Party_id3; 1;2;3; 0 0 4;5;6; 0 7;8;9; How can I adjust the file so it looks like this: Party_Id1;Party_id2;Party_id3; 1;2;3; 4;5;6; 7;8;9; I Think the '0' is something like a carriage return, I don't know. But how... (2 Replies)
Discussion started by: katled
2 Replies

9. Shell Programming and Scripting

Remove lines that are subsets of other lines in File

Hello everyone, Although it seems easy, I've been stuck with this problem for a moment now and I can't figure out a way to get it done. My problem is the following: I have a file where each line is a sequence of IP addresses, example : 10.0.0.1 10.0.0.2 10.0.0.5 10.0.0.1 10.0.0.2... (5 Replies)
Discussion started by: MisterJellyBean
5 Replies

10. Shell Programming and Scripting

awk remove/grab lines from file with pattern from other file

Sorry for the weird title but i have the following problem. We have several files which have between 10000 and about 500000 lines in them. From these files we want to remove lines which contain a pattern which is located in another file (around 20000 lines, all EAN codes). We also want to get... (28 Replies)
Discussion started by: SDohmen
28 Replies
GREP(1) 						      General Commands Manual							   GREP(1)

NAME
grep, g - search a file for a pattern SYNOPSIS
grep [ option ... ] pattern [ file ... ] g [ option ... ] pattern [ file ... ] DESCRIPTION
Grep searches the input files (standard input default) for lines that match the pattern, a regular expression as defined in regexp(7) with the addition of a newline character as an alternative (substitute for |) with lowest precedence. Normally, each line matching the pattern is `selected', and each selected line is copied to the standard output. The options are -c Print only a count of matching lines. -h Do not print file name tags (headers) with output lines. -e The following argument is taken as a pattern. This option makes it easy to specify patterns that might confuse argument parsing, such as -n. -i Ignore alphabetic case distinctions. The implementation folds into lower case all letters in the pattern and input before interpre- tation. Matched lines are printed in their original form. -l (ell) Print the names of files with selected lines; don't print the lines. -L Print the names of files with no selected lines; the converse of -l. -n Mark each printed line with its line number counted in its file. -s Produce no output, but return status. -v Reverse: print lines that do not match the pattern. -f The pattern argument is the name of a file containing regular expressions one per line. -b Don't buffer the output: write each output line as soon as it is discovered. Output lines are tagged by file name when there is more than one input file. (To force this tagging, include /dev/null as a file name argument.) Care should be taken when using the shell metacharacters $*[^|()= and newline in pattern; it is safest to enclose the entire expression in single quotes '...'. An expression starting with '*' will treat the rest of the expression as literal characters. G invokes grep with -n and forces tagging of output lines by file name. If no files are listed, it searches all files matching *.C *.b *.c *.h *.m *.cc *.java *.cgi *.pl *.py *.tex *.ms SOURCE
/src/cmd/grep /bin/g SEE ALSO
ed(1), awk(1), sed(1), sam(1), regexp(7) DIAGNOSTICS
Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs. GREP(1)
All times are GMT -4. The time now is 04:36 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy