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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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MAKEDBM(8)						       NIS Reference Manual							MAKEDBM(8)

NAME
makedbm - create or dump a ypserv database file SYNOPSIS
/usr/lib/yp/makedbm [-a | -r] [-b] [-c] [-s] [-l] [-i YP_INPUT_NAME] [-o YP_OUTPUT_NAME] [-m YP_MASTER_NAME] inputfile dbname /usr/lib/yp/makedbm -u dbname /usr/lib/yp/makedbm -c /usr/lib/yp/makedbm --version DESCRIPTION
makedbm takes the inputfile and converts it to a ypserv database file. In the moment, GDBM is used as database. Each line of the input file is converted to a single record. All characters up to the first TAB or SPACE are the key, and the rest of the line is the data. makedbm does not treat `#' as a special character. OPTIONS
-a Special support for mail aliases. We couldn't use sendmail for it, since sendmail uses db, but ypserv gdbm as database format. -b Insert the YP_INTERDOMAIN into the output. This key causes ypserv(8) to use DNS for host name and address lookups for hosts not found in the maps. -c send a YPPROC_CLEAR to the local ypserv(8). This causes ypserv to invalidate all cached entries. -l Convert the keys of the given map to lower case. -i YP_INPUT_NAME Create a special entry with the key YP_INPUT_NAME. -m YP_MASTER_NAME Create a special entry with the key YP_MASTER_NAME. If no master host name is specified, YP_MASTER_NAME will be set to the local host name. -o YP_OUTPUT_NAME Create a special entry with the key YP_OUTPUT_NAME. -r Handle `#' as comment sign and remove the comment. -s Secure map. Accept connections from secure NIS networks only (reserved ports). -u dbname Dump a ypserv database file. Prints out the file in text format, one entry per line, with a single space separating keys from values. --no-limit-check Don't check for NIS key and data limit. SEE ALSO
ypserv(8) AUTHOR
makedbm was written by Thorsten Kukuk <kukuk@linux-nis.org>. NIS Reference Manual 09/26/2007 MAKEDBM(8)
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