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Top Forums Shell Programming and Scripting Replace a column with a value by ignoring the header lines Post 302785179 by aravindj80 on Monday 25th of March 2013 05:42:16 AM
Old 03-25-2013
Replace a column with a value by ignoring the header lines

i have a file in the gz format , the content of the file is as follow.

gzcat f1.gz

# 1.name
# 2.location
# 3.age
# 4.dob
.
.
.
.
.
.
.
.
.
# 43.hobbies

< Aravind,33,chennai,09091980, , , , , , , surfing>
< Swapnil,32,bhopal,01121981, , , , , , , cricket>

i want to hide the DoB 4th column with ******* and any suggestion please.

Code:
gzcat f1.gz | nawk '{gsub("09091980","********",$5)}1' | more

by doing this i am able to do line by line only , how to do it at one shot , any suggestion please.

Is it possible to do without disturbing the first 45 lines where it indicates the description of the positions.

Last edited by aravindj80; 03-25-2013 at 07:47 AM..
 

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PR(1)							      General Commands Manual							     PR(1)

NAME
pr - print file SYNOPSIS
pr [ option ] ... [ file ] ... DESCRIPTION
Pr produces a printed listing of one or more files. The output is separated into pages headed by a date, the name of the file or a speci- fied header, and the page number. If there are no file arguments, pr prints its standard input. Options apply to all following files but may be reset between files: -n Produce n-column output. +n Begin printing with page n. -h Take the next argument as a page header. -wn For purposes of multi-column output, take the width of the page to be n characters instead of the default 72. -ln Take the length of the page to be n lines instead of the default 66. -t Do not print the 5-line header or the 5-line trailer normally supplied for each page. -sc Separate columns by the single character c instead of by the appropriate amount of white space. A missing c is taken to be a tab. -m Print all files simultaneously, each in one column, Inter-terminal messages via write(1) are forbidden during a pr. FILES
/dev/tty? to suspend messages. SEE ALSO
cat(1) DIAGNOSTICS
There are no diagnostics when pr is printing on a terminal. PR(1)
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