Looking for a better way to extract a string

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to extract every repeated string between two specific string?

Hello guys, I have problem with hpux shell script. I have one big text file that contains like SOH bla bla bla bla bla bla ETX SOH bla bla bla ETX SOH bla bla bla ETX What I need to do is save first SOH*BLA into file1.txt, save second SOH*BLA into file2.txt and so on....

2. Shell Programming and Scripting

To Search for a string and to extract the string from the text

Hi Team I have an huge xml where i need to search for a ceratin numbers. For example 2014-05-06 15:15:41,498 INFO WebContainer : 10 CommonServicesLogs - CleansingTriggerService.invokeCleansingService Entered PUBSUB NOTIFY MESSAGE () - <?xml version="1.0" encoding="UTF-8"...

3. Shell Programming and Scripting

Search String and extract few lines under the searched string

Need Assistance in shell programming... I have a huge file which has multiple stations and i wanted to search particular station and extract few lines from it and the rest is not needed Bold letters are the stations . The whole file has multiple stations . Below example i wanted to search...

4. Shell Programming and Scripting

Extract a string from another string in UNIX

I have a string string="Please have a nice day and sleep well Replace_12123_31233_32134_12342 Good day" How do i replace "Replace_12123_31233_32134_1234" in the above string.?? Please help. Regards, Qwerty

5. Shell Programming and Scripting

Extract a string between 2 ref string from a file

Hi, May i ask if someone share some command for extracting a string between 2 ref string in a txt file My objective: i had a file with multiple lines and wants only to extract the string "watch?v=IbkAXOmEHpY" or "watch?v=<11 random character>", when i used "grep 'watch?=*' i got a results per...

6. Shell Programming and Scripting

to extract string from main string and string comparison

continuing from my previous post, whose link is given below as a reference https://www.unix.com/shell-programming-scripting/171076-shell-scripting.html#post302573569 consider there is create table commands in a file for eg: CREATE TABLE `Blahblahblah` ( `id` int(11) NOT NULL...

7. Shell Programming and Scripting

extract a string within a string using a pattern

hi all, i have a file name using the following pattern: PREFIX: AR SOURCE: LEGACY DATETIME: YYYYMMDD_HH24MISS SUFFIX: .txt sample filename: AR_LEGACY_20101104_105500.txt i want to extract the source which is LEGACY in this case. how do i do this using shell? thanks.

8. Shell Programming and Scripting

Search for string in a file and extract another string to a variable

Hi, guys. I have one question: I need to search for a string in a file, and then extract another string from the file and assign it to a variable. For example: the contents of the file (group) is below: ... ftp:x:23: mail:x:34 ... testing:x:2001 sales:x:2002 development:x:2003 ......

9. Shell Programming and Scripting

extract a sub string from a main string

i need a shell program to extract a substring from a main string.. for eg:- main string is madhu.. sub string is mad o/p:- be mad. try to solve this one

10. UNIX for Dummies Questions & Answers

How to extract a portion of a string from the whole string

How to extract a portion of a string from a full string using unix. For example: Say source string is = "req92374923.log" I want only the numeric portion of the string say "92374923" how to do that in Unix.

LEARN ABOUT CENTOS

shell-quote

SHELL-QUOTE(1)						User Contributed Perl Documentation					    SHELL-QUOTE(1)

NAME

       shell-quote - quote arguments for safe use, unmodified in a shell command

SYNOPSIS

       shell-quote [switch]... arg...

DESCRIPTION

       shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell.  This lets you process commands
       or files with embedded white space or shell globbing characters safely.	Here are a few examples.

EXAMPLES

       ssh preserving args
	   When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives.  It just joins them with spaces and
	   passes them to "$SHELL -c".	This doesn't work as intended:

	       ssh host touch 'hi there'	   # fails

	   It creates 2 files, hi and there.  Instead, do this:

	       cmd=`shell-quote touch 'hi there'`
	       ssh host "$cmd"

	   This gives you just 1 file, hi there.

       process find output
	   It's not ordinarily possible to process an arbitrary list of files output by find with a shell script.  Anything you put in $IFS to
	   split up the output could legitimately be in a file's name.	Here's how you can do it using shell-quote:

	       eval set -- `find -type f -print0 | xargs -0 shell-quote --`

       debug shell scripts
	   shell-quote is better than echo for debugging shell scripts.

	       debug() {
		   [ -z "$debug" ] || shell-quote "debug:" "$@"
	       }

	   With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.

       save a command for later
	   shell-quote can be used to build up a shell command to run later.  Say you want the user to be able to give you switches for a command
	   you're going to run.  If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
	   things the user can't pass through), you can do something like this:

	       user_switches=
	       while [ $# != 0 ]
	       do
		   case x$1 in
		       x--pass-through)
			   [ $# -gt 1 ] || die "need an argument for $1"
			   user_switches="$user_switches "`shell-quote -- "$2"`
			   shift;;
		       # process other switches
		   esac
		   shift
	       done
	       # later
	       eval "shell-quote some-command $user_switches my args"

OPTIONS

       --debug
	   Turn debugging on.

       --help
	   Show the usage message and die.

       --version
	   Show the version number and exit.

AVAILABILITY

       The code is licensed under the GNU GPL.	Check http://www.argon.org/~roderick/ or CPAN for updated versions.

AUTHOR

       Roderick Schertler <roderick@argon.org>

perl v5.16.3							    2010-06-11							    SHELL-QUOTE(1)

Shell Programming and Scripting