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Full Discussion: awk regex problem
Top Forums Shell Programming and Scripting awk regex problem Post 302527250 by aishsimplesweet on Friday 3rd of June 2011 01:53:36 AM
Old 06-03-2011
awk regex problem

hi everyone

suppose my input file is
Code:
 
ABC-12345
ABCD-12345
BCD-123456

i want to search the specific pattern which looks like
Code:
[A-Z][A-Z][A-Z]-[0-9][0-9][0-9][0-9][0-9]

in a file so i used this command
Code:
cat $file | awk ' { if ($0 ~ /[A-Z][A-Z][A-Z]-[0-9][0-9][0-9][0-9][0-9]/) { print } }'

so it gives me the result as
Code:
 
ABCD-12345
BCD-12345
BCD-12345


but this is not correct i want the exact string from this
so output should be only
Code:
BCD-12345

please help me in this
 

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TRUNCATE(1)							   User Commands						       TRUNCATE(1)

NAME
truncate - shrink or extend the size of a file to the specified size SYNOPSIS
truncate OPTION... FILE... DESCRIPTION
Shrink or extend the size of each FILE to the specified size A FILE argument that does not exist is created. If a FILE is larger than the specified size, the extra data is lost. If a FILE is shorter, it is extended and the extended part (hole) reads as zero bytes. Mandatory arguments to long options are mandatory for short options too. -c, --no-create do not create any files -o, --io-blocks treat SIZE as number of IO blocks instead of bytes -r, --reference=RFILE base size on RFILE -s, --size=SIZE set or adjust the file size by SIZE bytes --help display this help and exit --version output version information and exit The SIZE argument is an integer and optional unit (example: 10K is 10*1024). Units are K,M,G,T,P,E,Z,Y (powers of 1024) or KB,MB,... (pow- ers of 1000). SIZE may also be prefixed by one of the following modifying characters: '+' extend by, '-' reduce by, '<' at most, '>' at least, '/' round down to multiple of, '%' round up to multiple of. AUTHOR
Written by Padraig Brady. REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report truncate translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
dd(1), truncate(2), ftruncate(2) Full documentation at: <http://www.gnu.org/software/coreutils/truncate> or available locally via: info '(coreutils) truncate invocation' GNU coreutils 8.28 January 2018 TRUNCATE(1)
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