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

Sponsored Content

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

Antony Ankrose

View Public Profile for Antony Ankrose

Find all posts by Antony Ankrose

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Regular expression with sed

Hi, I'm trying following:echo "test line XA24433 test" | sed 's/.*X$.*$/X\1/' XA24433 test While I want the output as: XA24433 I want to grab the words starting with letter X till the next space, this word can be anywhere in the line.

2. Shell Programming and Scripting

Regular expression with SED

Hi! I'm trying to write a regexp but I have no luck... I have a string like this: param1=sometext&param2=hello&param3=bye Also, the string can be simply: param2=hello I want to return the value of param2: "hello". How can I do this? Thanks.

3. Shell Programming and Scripting

SED (regular expression) problem ---

Hello, I would like to replace Line 187 of my file named run_example. The original line is below, including the spaces: celldm(1) = 6.00, I want it to become something like celldm(1) = 6.05, or celldm(1) = 6.10, where the number is stored in a variable called...

4. Shell Programming and Scripting

Regular expression (sed)

Hi I need to get text that are within "" For example File: asdasd "test test2" sadasds asdda asdasd "demo demo2" Output: test test2 demo demo2 Any help is good Thank you

5. Shell Programming and Scripting

sed regular expression help

please consider this: echo "11111*X*005010X279~ST*270*1111111*005010X279~BHT*0011*11" | sed 's/.*$005010X(\d)(\d)(\d)*$.*$/\1/'i'm searching for first occurrence of 005010X while leaving rest of characters out. :confused: any tips? thnx in advance guys.

6. UNIX for Dummies Questions & Answers

Regular Expression In Sed

Hi , I am learing sed echo abc 123 def 456 | sed 's|$*$ $*$|\1|' is returning abc def 456 i was hoping abc def "\1" should only print the occurence of the first pattern but according to my understanding it is just removing the first occurence of the second pattern...

7. Shell Programming and Scripting

Help with sed regular expression

Hi all, I want to get a substring from a string based on given delimiter, for example: str="foo|bar|baz" with delimiter "|", I want to get one substring at each time with the order number the substring in the whole string, given 1 to get "foo", given 2 to get "bar", given 3 to get "baz", I...

8. UNIX for Advanced & Expert Users

sed: -e expression #1, char 0: no previous regular expression

Hello All, I'm trying to extract the lines between two consecutive elements of an array from a file. My array looks like: problem_arr=(PRS111 PRS213 PRS234) j=0 while } ] do k=`expr $j + 1` sed -n "/${problem_arr}/,/${problem_arr}/p" problemid.txt ---some operation goes...

9. Shell Programming and Scripting

sed regular expression

Hi , I need to remove pipe character from a |^ delimeted file. Something like |^tran|sformers||^|revenge |of fallen|^ to |^transformers|^revenge of fallen|^... Cold anybody please help to build the regular expression using sed . many thanks. Please use code tags next time for...

LEARN ABOUT SUNOS

capture-schema

capture-schema(1m)					    Application Server Utility						capture-schema(1m)

NAME

       capture-schema -  stores the database metadata (schema) in a file for use in mapping and execution

SYNOPSIS

       capture-schema-dburl url-username name- password password-driver a_jdbc_driver [-schemaname name] [-table tablename]* [-out filename]

       Stores  the  database metadata (schema) in a file. You can also use the Sun Java System Studio IDE to capture the database schema. Run cap-
       ture-schema as the same database user that owns the tables, so that the -username and -schemaname options  are  given  the  same  username.
       Additionally, you can grant the database user running the capture-schema command the ANALYZE ANY TABLE privilege.

OPTIONS

       -dburl		       JDBC URL expected by the driver for accessing a database.

       -username	       user name for authenticating access to a database.

       -password	       password for accessing the selected database.

       -driver		       JDBC driver classname in your CLASSPATH.

       -schemaname	       name of the user schema being captured. If not specified, the default will capture metadata for all tables from all
			       the schemas accessible to this user. Specifying this parameter is highly recommended. If more than  one	schema	is
			       accessible to this user, more than one table with the same name may be captured which will cause problems.

       -table		       name of the table; multiple table names can be specified.

       -out		       output target; defaults to stdout. This parameter corresponds to the schema sub-element of the sun-cmp-mapping ele-
			       ment in the sun-cmp-mapping_1_1.dtd file.

EXAMPLES

       Example 1: Using capture-schema

       capture-schema -dburl jdbc:oracle:thin:@sadbuttrue:1521:ora817
       -schemaname cantiflas -username CANTIFLAS -password enigma -driver
       oracle.jdbc.driver.OracleDriver

       asadmin(1M)

Sun Java System Application Server				    March 2004							capture-schema(1m)