I need to run a script to remove the last column of different comma separated files.
The problem is that the number of columns of my files will be different and I won't know that number every time i run my script.
Is there any command I can use to remove the last column without specifying its number?
I can use cut but only when I know the column position.
I was trying another approach. If I calculate the number of the last column then I could use cut.
To find the last column I use:
but now I have the problem of how do I store that value in a variable so I can use cut?
If I use:
I get this error: bash: FS=,: command not found
Thanks in advance
loperam
Last edited by Scott; 09-03-2010 at 03:36 PM..
Reason: Please use code tags
Hi,
How do I store following command output:
export RESULT=`date` &
It works when I do :
export RESULT=`date`
But what I need is when command put it background, I also need that output going to RESULT variable.
Is there any way ?
Thanks
Sanjay (1 Reply)
Hi,
I am getting the following error while executing the script. Please can someone throw some light where is the problem. Many thanks.
./check: temp: not found
The directory related to SEP instance 4 does not exist.
The script is as follows.
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When I run following command
date
Output1 => Thu Sep 9 03:26:52 IST 2010
When I store in a varibale as
a=`date`
echo $a
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The differnece is, it is trimming the space when I am storing the output in varibale.
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Discussion started by: atanubanerji
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LEARN ABOUT MINIX
cut
CUT(1) General Commands Manual CUT(1)NAME
cut - select out columns of a file
SYNOPSIS
cut [ -b | -c] list [file...]
cut -f list [-d delim] [ -s]
OPTIONS -b Cut specified bytes
-c Select out specific characters
-d Change the column delimiter to delim
-f Select out specific fields that are separated by the
-i Runs of delimiters count as one
-s Suppres lines with no delimiter characters, when used
EXAMPLES
cut -f 2 file # Extract field 2
cut -c 1-2,5 file # Extract character columns 1, 2, and 5
cut -c 1-5,7- file # Extract all columns except 6
DESCRIPTION
[file...]" delimiter character ( see delim)" with the -f option. Lines with no delimiters are passwd through untouched"
Cut extracts one or more fields or columns from a file and writes them on standard output. If the -f flag is used, the fields are sepa-
rated by a delimiter character, normally a tab, but can be changed using the -d flag. If the -c flag is used, specific columns can be
specified. The list can be comma or BLANK separated. The -f and -c flags are mutually exclusive. Note: The POSIX1003.2 standard requires
the option -b to cut out specific bytes in a file. It is intended for systems with multi byte characters (e.g. kanji), since MINIX uses
only one byte characters, this option is equivalent to -c. For the same reason, the option -n has no effect and is not listed in this man-
ual page.
SEE ALSO sed(1), awk(9).
CUT(1)