I am learning regular expression in sed,Please help me understand the use curly bracket in sed, Post: 302904542

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Top Forums Shell Programming and Scripting I am learning regular expression in sed,Please help me understand the use curly bracket in sed, Post 302904542 by Antony Ankrose on Wednesday 4th of June 2014 03:49:34 PM

06-04-2014

Registered User

Thanks you very much , i got it clarified.

Please help me to understand sed statement

Question 2
-----------

Code:

Code:

/opt/oracle/work/antony>  ls -l | sed -n '/^.\{2,3\}w/p'
-rw-r-----   1 oracle     dba             11 Jun  2 15:28 control.sql
-rw-r-----   1 oracle     dba             50 Mar 24 16:40 db_list
-rw-r-----   1 oracle     dba            386 Jun  3 16:34 emp.1st
-rw-r-----   1 oracle     dba              0 Jun  3 16:39 sed
-rw-r-----   1 oracle     dba            327 Jun  2 15:09 stuff.sql
-rw-r-----   1 oracle     dba            120 Jun  3 20:10 teledir.txt
drwxr-x---   2 oracle     dba             96 Jun  3 17:14 test
-rwxr-xr-x   1 oracle     dba            330 Mar 24 16:42 trex.sh

From the above select statement,

1. i am not able to understand what is the use of curly brackets?
2. what is the use of {2,3\}w meant for?

Please explain

Last edited by Antony Ankrose; 06-04-2014 at 05:23 PM.. Reason: CODE tags added

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cubrid_db_name

CUBRID_DB_NAME(3)							 1							 CUBRID_DB_NAME(3)

cubrid_db_name - Get db name from results of cubrid_list_dbs

SYNOPSIS

       string cubrid_db_name (array  $result, int  $index)

DESCRIPTION

	Retrieve the database name from a call to cubrid_list_dbs(3).

PARAMETERS

	      o $result
		- The result pointer from a call to cubrid_list_dbs(3).

	      o $index
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RETURN VALUES

	Returns  the  database	name  on  success,  and FALSE on failure. If FALSE is returned, use cubrid_error(3) to determine the nature of the
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SEE ALSO

       cubrid_list_dbs(3).

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