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Top Forums Shell Programming and Scripting awk,cut fields by change field format Post 302368586 by jimmy_y on Thursday 5th of November 2009 06:30:01 AM
Old 11-05-2009
awk,cut fields by change field format

Hi Everyone,

Code:
[root@]# cat 1.txt
1321631,77770132976455,19,20091001011859,20091001011907
1321631,77770132976455,19,20091001011859,20091001011907
1321631,77770132976455,19,20091001011859,20091001011907
[root@]# cat 1.txt | awk -F, '{OFS=",";print $1,$3,$4,$5}'
1321631,19,20091001011859,20091001011907
1321631,19,20091001011859,20091001011907
1321631,19,20091001011859,20091001011907
[root@]# cat 1.txt | cut -f1,3,4,5 -d ','
1321631,19,20091001011859,20091001011907
1321631,19,20091001011859,20091001011907
1321631,19,20091001011859,20091001011907
[root@]#

I can use either awk or cut to acheive the same result. If the finally output is:
1321631,19,20091001011859,20091001,011907
1321631,19,20091001011859,20091001,011907
1321631,19,20091001011859,20091001,011907
means to seperate the yyymmdd and hhmmss with ',', how should i do with awk or cut, or sed, etc, without open 1.txt, read the file, split','.

Thanks
 

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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)
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