Sponsored Content
Top Forums Shell Programming and Scripting Shell script for searching a record,copy to a file and then delete it Post 302429999 by kumara2010 on Wednesday 16th of June 2010 10:33:21 AM
Old 06-16-2010
Hi,I have been using the resolution you had given last time but it doesnt seem to work with huge files. I wil explain.As in similar lines given in example above,in the real time scenario that i havefile 1 has 30K recordsfile 2 has 25 lac recordsRequirement is: Read file 1 and copy all occurances of the record in file2 to a new file,say file3.When i use grep -f file1 file2 > file 3,file 3 is having the records required along with many unwanted records in file2 and i have to delete the unwanted records in file3. Considering the huge count,its becoming tedious. Any work around to ensure that only desired records in file1 are copied to file3 from file 2??
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

How to delete a record from a csv file

Hi Guys I have downloaded a table from oracle database in .csv format. it has many fields as Title, First Name, Last Name etc. I have to download distinct titles from database and now i have to check all those titles from data of First Name one by one. and then i have to delete matched record.... (1 Reply)
Discussion started by: Rajeev Agrawal
1 Replies

2. Shell Programming and Scripting

Shell Script - Copy File at intervals

Hi, I want to copy some files from a Folder say, /usr/X at random intervals to another location. Basically, new files will be dumped at random intervals to location /usr/X and I have to copy those new files to some other location (after copying, I cannot delete those files from source... (2 Replies)
Discussion started by: angshuman_ag
2 Replies

3. Shell Programming and Scripting

Copy file after searching in a directory

Hi, I am looking for an answer for following senario: I have a text file (base.txt) which consist list of files to be searched like: base.txt abc.txt def.txt fgh.txt Now i am going to search all the listed files in another directory after reading them one by one, once i found the... (10 Replies)
Discussion started by: apjneeraj
10 Replies

4. Shell Programming and Scripting

How to delete first record from all the file?

hi All, need help...!! I want to delete header record from all the files in current directory. using sed command i can delete first record from a file but i want to delete first record from all the files so can anybosy help me how can i do this? I will appreciate your help. (3 Replies)
Discussion started by: NirajThakar
3 Replies

5. Shell Programming and Scripting

Shell script to copy file

Dear all, I have a database with thousands of files with the structure of name is: Filename_hour_year.abc Filename_hour_year_1.abc .............. So what I need is how to write a script that all file with contain the character "_1" will copy to "_2" For example: file name:... (7 Replies)
Discussion started by: hainguyen1402
7 Replies

6. Shell Programming and Scripting

How to delete 1 record in large file!

Hi All, I'm a newbie here, I'm just wondering on how to delete a single record in a large file in unix. ex. file1.txt is 1000 records nikki1 nikki2 nikki3 what i want to do is delete the nikki2 record in file1.txt. is it possible? Please advise, Thanks, (3 Replies)
Discussion started by: nikki1200
3 Replies

7. UNIX for Dummies Questions & Answers

how to copy files and record original file location?

:EDIT: I think my post name should have been labeled: how to copy files and record original file location. not "retain". Hello, this is my first post! I searched the forums a lot before posting, but was unable to answer my question. Here's my problem: There are several hundred text files... (4 Replies)
Discussion started by: willie8605
4 Replies

8. UNIX for Dummies Questions & Answers

Delete a record in a xml file using shell scripting

find pattern, delete line with pattern and 3 lines above and 8 lines below the pattern. The pattern is "isup". The entire record with starting tag <record> and ending tag </record> containing the pattern is to be deleted and the rest to be retained. <record> ... (4 Replies)
Discussion started by: sdesstp
4 Replies

9. Shell Programming and Scripting

Print record count of a file using shell script

HI, I need to print the record count of a file using shell script. If the record count of a file excluding header and trailer record if greater than zero then print 'Record count of a file is xxxx records'. If the record count is zero print 'zero records' Thanks Mahendra (1 Reply)
Discussion started by: mmeda
1 Replies

10. Shell Programming and Scripting

Delete last 2 fields from every record in a file

Sample file record : "20130617003","2013-06-18T07:00:03","OUTWARD","01001011","TEST PLC","","HFX834346364364","20130617","10","DUM87534758","","1.28","826","020201","65879278","","","","","","010101","56789","DUMMY... (3 Replies)
Discussion started by: bigbuk
3 Replies
MERGE(1)						      General Commands Manual							  MERGE(1)

NAME
merge - three-way file merge SYNOPSIS
merge [ options ] file1 file2 file3 DESCRIPTION
merge incorporates all changes that lead from file2 to file3 into file1. The result ordinarily goes into file1. merge is useful for com- bining separate changes to an original. Suppose file2 is the original, and both file1 and file3 are modifications of file2. Then merge combines both changes. A conflict occurs if both file1 and file3 have changes in a common segment of lines. If a conflict is found, merge normally outputs a warning and brackets the conflict with <<<<<<< and >>>>>>> lines. A typical conflict will look like this: <<<<<<< file A lines in file A ======= lines in file B >>>>>>> file B If there are conflicts, the user should edit the result and delete one of the alternatives. OPTIONS
-A Output conflicts using the -A style of diff3(1), if supported by diff3. This merges all changes leading from file2 to file3 into file1, and generates the most verbose output. -E, -e These options specify conflict styles that generate less information than -A. See diff3(1) for details. The default is -E. With -e, merge does not warn about conflicts. -L label This option may be given up to three times, and specifies labels to be used in place of the corresponding file names in conflict reports. That is, merge -L x -L y -L z a b c generates output that looks like it came from files x, y and z instead of from files a, b and c. -p Send results to standard output instead of overwriting file1. -q Quiet; do not warn about conflicts. -V Print RCS's version number. DIAGNOSTICS
Exit status is 0 for no conflicts, 1 for some conflicts, 2 for trouble. IDENTIFICATION
Author: Walter F. Tichy. Manual Page Revision: 1999-08-27; Release Date: 23:37:10Z. Copyright (C) 1982, 1988, 1989 Walter F. Tichy. Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995 Paul Eggert. SEE ALSO
diff3(1), diff(1), rcsmerge(1), co(1). BUGS
It normally does not make sense to merge binary files as if they were text, but merge tries to do it anyway. GNU
23:37:10Z MERGE(1)
All times are GMT -4. The time now is 03:25 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy