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Full Discussion: Using sed
Top Forums UNIX for Dummies Questions & Answers Using sed Post 302917442 by Don Cragun on Tuesday 16th of September 2014 04:51:50 PM
Old 09-16-2014
Quote:
Originally Posted by netdbaind
Hi
how to filter 2nd column values of a output file using sed.

I have output like this.

Code:
                       KEY_NM                      | VALUE_TX
----------------------------------------------------+----------
 ID                                                | A
(1 row)

I have to search what is the the value of value_tx in 2nd column.
Your specification of the desired output is ambiguous. Are the whitespace characters between the "|" and the 1st non-whitespace character data that you want to preserve, or are they part of the field separator between the two fields?

If you want to remove leading whitespace in the 2nd field, is it always a single space or can it be multiple spaces, or a combination of spaces and tabs?

If you want to preserve the whitespace, a simpler solution than that provided by Mannu2525 (using only one invocation of sed) would be:
Code:
sed -n '3,$s/.*|//p' file

and if you want to remove leading whitespace, this is a little simpler than balajesuri's suggestion:
Code:
sed -n '3,$s/.*|[[:space:]]*//p' file

 

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LEARN ABOUT CENTOS

column

COLUMN(1)							   User Commands							 COLUMN(1)

NAME

       column - columnate lists

SYNOPSIS

       column [options] file...

DESCRIPTION

       The column utility formats its input into multiple columns.  Rows are filled before columns.  Input is taken from file or, by default, from
       standard input.	Empty lines are ignored.

OPTIONS

       -c, --columns width
	      Output is formatted to a width specified as number of characters.

       -t, --table
	      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 separator. Table output is useful for pretty-printing.

       -s, --separator separators
	      Specify possible table delimiters (default is whitespace).

       -o, --output-separator separators
	      Specify table output delimiter (default is two whitespaces).

       -x, --fillrows
	      Fill columns before filling rows.

       -h, --help
	      Print help and exit.

ENVIRONMENT

       The environment variable COLUMNS is used to determine the size of the screen if no other information is available.

EXAMPLES

       sed 's/#.*//' /etc/fstab | column -t

BUGS

       The util-linux version 2.23 changed -s option to be non-greedy, for example:

       $ printf "a:b:c
1::3
" | column  -t -s ':'

       old output:
       a  b  c
       1  3

       new output (since util-linux 2.23)
       a  b  c
       1     3

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 package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

util-linux							   October 2010 							 COLUMN(1)
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