Null values after emptying a log file Post: 56624

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identifying null values in a file

I have a huge file with 20 fileds in each record and each field is seperated by "|". If i want to get all the reocrds that have 18th or for that matter any filed as null how can i do it? Please let me know

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LEARN ABOUT CENTOS

scanlogs

SCANLOGS(8)						      System Manager's Manual						       SCANLOGS(8)

NAME

       scanlogs - summarize INN log files.

SYNOPSIS

       scanlogs [ norotate ] [ nonn ]

DESCRIPTION

       Scanlogs  summarizes  the information recorded in the INN log files (see newslog(5)).  By default, it also rotates and cleans out the logs.
       It is normally invoked by the news.daily(8) script.

KEYWORDS

       The following keywords are accepted:

       norotate
	      Using this keyword disables the rotating and cleaning aspect of the log processing: the logs files are only scanned for  information
	      and no contents are altered.

       nonn   Normally the nn log file is scanned and rotated.	Using this keyword disables this function.

       If scanlogs is invoked more than once a day, the ``norotate'' keyword should be used to prevent premature log cleaning.

HISTORY

       Written by Landon Curt Noll <chongo@toad.com> and Rich $alz <rsalz@uunet.uu.net> for InterNetNews.  This is revision 1.1, dated 1996/10/29.

SEE ALSO

       innd(8) newslog(5), news.daily(8), nnrpd(8).

																       SCANLOGS(8)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

identifying null values in a file

Discussion started by: dsravan

2. Shell Programming and Scripting

How to check Null values in a file column by column if columns are Not NULLs

Discussion started by: Mandab

3. UNIX for Dummies Questions & Answers

Emptying a file (bring the size of the file down to 0 , or close to 0)

Discussion started by: qmqmqm

4. Shell Programming and Scripting

Sed emptying file when i use for search replace operation

Discussion started by: rakeshkumar