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Top Forums UNIX for Beginners Questions & Answers Remove footer record in specific condition Post 303009217 by KK230689 on Monday 11th of December 2017 04:35:52 AM
Old 12-11-2017
Quote:
Originally Posted by Don Cragun
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If values other than JE are at the start of records that need to be removed, how are those records identified?

Do you always want to remove every line that starts with a J?

Do you always want to remove every line that starts with an uppercase alphabetic character?

Do you always want to remove every line that starts with a character that is not a numeric character?

Do you always want to remove the last line in every file you process?

Do you always want to remove every line that contains exactly two commas?

What operating system are you using?

What shell are you using?

What have you tried to solve this problem on your own?
we are using the following version of os version

Code:
Linux uklvaucup01a 2.6.32-696.3.2.el6.x86_64 #1 SMP Wed Jun 7 11:51:39 EDT 2017 x86_64 x86_64 x86_64 GNU/Linux

Your question :
Do you always want to remove every line that contains exactly two commas?

Yes , but need not look all line for 2 commas, usual it will be found at the footer record. these record will not be available start and middle. so our approach is to look tail of the file and matches the pattern as less than 2 or 3 commas .

thanks for your quick response

Last edited by rbatte1; 12-11-2017 at 11:27 AM.. Reason: Added CODE tags and fixed some spelling issues
 

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RM(1)								   User Commands							     RM(1)

NAME
rm - remove files or directories SYNOPSIS
rm [OPTION]... [FILE]... DESCRIPTION
This manual page documents the GNU version of rm. rm removes each specified file. By default, it does not remove directories. If the -I or --interactive=once option is given, and there are more than three files or the -r, -R, or --recursive are given, then rm prompts the user for whether to proceed with the entire operation. If the response is not affirmative, the entire command is aborted. Otherwise, if a file is unwritable, standard input is a terminal, and the -f or --force option is not given, or the -i or --interac- tive=always option is given, rm prompts the user for whether to remove the file. If the response is not affirmative, the file is skipped. OPTIONS
Remove (unlink) the FILE(s). -f, --force ignore nonexistent files and arguments, never prompt -i prompt before every removal -I prompt once before removing more than three files, or when removing recursively; less intrusive than -i, while still giving protec- tion against most mistakes --interactive[=WHEN] prompt according to WHEN: never, once (-I), or always (-i); without WHEN, prompt always --one-file-system when removing a hierarchy recursively, skip any directory that is on a file system different from that of the corresponding command line argument --no-preserve-root do not treat '/' specially --preserve-root do not remove '/' (default) -r, -R, --recursive remove directories and their contents recursively -d, --dir remove empty directories -v, --verbose explain what is being done --help display this help and exit --version output version information and exit By default, rm does not remove directories. Use the --recursive (-r or -R) option to remove each listed directory, too, along with all of its contents. To remove a file whose name starts with a '-', for example '-foo', use one of these commands: rm -- -foo rm ./-foo Note that if you use rm to remove a file, it might be possible to recover some of its contents, given sufficient expertise and/or time. For greater assurance that the contents are truly unrecoverable, consider using shred. AUTHOR
Written by Paul Rubin, David MacKenzie, Richard M. Stallman, and Jim Meyering. REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report rm translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
unlink(1), unlink(2), chattr(1), shred(1) Full documentation at: <http://www.gnu.org/software/coreutils/rm> or available locally via: info '(coreutils) rm invocation' GNU coreutils 8.28 January 2018 RM(1)
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