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Top Forums Shell Programming and Scripting Awk to display lines that contain a period only in the first column Post 302712711 by spartan22 on Tuesday 9th of October 2012 03:59:37 PM
Old 10-09-2012
Awk to display lines that contain a period only in the first column

I've been trying to figure this out for quite a bit... I'm trying to check the first column for a period and only display the line if it contains a period. Below is a sample of the data i'm working with.

Code:
www.homestorest	7200	IN	CNAME	www.homestorest.fishing.net.shopit.net.
homestorestfeeds	7200	IN	CNAME	homestorestfeeds.fishing.net.mana.net.
homestoreststore	7200	IN	A	10.10.10.10
sprint.qa.homestoreststore	7200	IN	A	5.5.5.5
asdf.homestyle	7200	IN	CNAME	master.fishing.mom.net
mip	7200	IN	CNAME	xip-geo.xplat.fishing.mana.net.
anoc-ir	7200	IN	CNAME	cmts.g

I've tried the following but it's checking against both columns...

Code:
awk '$1 ~ "."' file

Thanks in advance
 

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COLUMN(1)						    BSD General Commands Manual 						 COLUMN(1)

NAME
column -- columnate lists SYNOPSIS
column [-tx] [-c columns] [-s sep] [file ...] DESCRIPTION
The column utility formats its input into multiple columns. Rows are filled before columns. Input is taken from file operands, or, by default, from the standard input. Empty lines are ignored. The options are as follows: -c Output is formatted for a display columns wide. -s Specify a set of characters to be used to delimit columns for the -t option. -t Determine the number of columns the input contains and create a table. Columns are delimited with whitespace, by default, or with the characters supplied using the -s option. Useful for pretty-printing displays. -x Fill columns before filling rows. Column exits 0 on success, >0 if an error occurred. ENVIRONMENT
COLUMNS The environment variable COLUMNS is used to determine the size of the screen if no other information is available. EXAMPLES
(printf "PERM LINKS OWNER GROUP SIZE MONTH DAY HH:MM/YEAR NAME " ; ls -l | sed 1d) | column -t SEE ALSO
colrm(1), ls(1), paste(1), sort(1) HISTORY
The column command appeared in 4.3BSD-Reno. AVAILABILITY
The column command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/. BSD
June 6, 1993 BSD
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