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The Lounge What is on Your Mind? Technology Illustrated Not able to remove special character ^I in file in Linux system Post 302981727 by Don Cragun on Sunday 18th of September 2016 03:19:24 PM
Old 09-18-2016
If you use the following sed command, replacing each occurrence of <space> with a single space character and replacing <tab> with a single tab character:
Code:
sed 's/<space>*<tab>[[:space:]]*/<space><space><space><space><space>/g' input_file > new_file

it will replace all sequences of zero or more spaces followed by a tab character followed by zero of more spaces and tabs in the file named input_file to exactly five space characters in the output file named new_file.

If someone else wants to try this on a Solaris/SunOS system, change sed to /usr/xpg4/bin/sed.
 

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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. BSD
June 6, 1993 BSD
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