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Full Discussion: Cryptography
Top Forums Shell Programming and Scripting Cryptography Post 302182048 by javeed7 on Saturday 5th of April 2008 02:08:48 AM
Old 04-05-2008
Cryptography

Hi,

I have a file which contains 4 columns. I want to encrypt only the first column. The rest of data must be as it is.
flat file:

12234333 jakdjf 394839 343874
73746373 5jdkfdj 383993 958939
83473843 lksdjfj 388383 349399

so, 1 should be replace by 4, 2 with 8, 3 with 7.....
the output should effect only first column.
Please help me.
SmilieSmilie
 

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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. ENVIRONMENT
The COLUMNS, LANG, LC_ALL and LC_CTYPE environment variables affect the execution of column as described in environ(7). EXIT STATUS
The column utility exits 0 on success, and >0 if an error occurs. EXAMPLES
(printf "PERM LINKS OWNER GROUP SIZE MONTH DAY " ; printf "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. BUGS
Input lines are limited to LINE_MAX (2048) bytes in length. BSD
July 29, 2004 BSD
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