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perl -ne 'rename $ARGV,$ARGV.&quot;_&quot;.(/.{9}(\S{<wbr />1,20})/)[0<wbr />] or die &quot;$ARGV $!&quot;;last' test1
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<div class="content wysiwyg-content">
Hi <br />
I have file whose name to be appended by a value in the same file<br />
<br />
The value starts from the position 10 and ends at position 30 , this value is same in &nbsp;the whole file. We have &nbsp;to trim the spaces if it has any spaces at its end.<br />
the file is fixed width file <br />
<br />
example<br />
filename: &nbsp; test1<br />
<br />
values in test1<br />
<br />
abc &nbsp; &nbsp; &nbsp; 34rtst &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; kkkkdafdf<br />
kfl &nbsp; &nbsp; &nbsp; &nbsp; 34rtst &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; kjdfada;lk<br />
dfa &nbsp; &nbsp; &nbsp; &nbsp;34rtst &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; adddfjadf<br />
<br />
the file name should be renamed to test1_34rtst
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Hi 
I have file whose name to be appended by a value in the same file

The value starts from the position 10 and ends at position 30 , this value is same in  the whole file. We have  to trim the spaces if it has any spaces at its end.
the file is fixed width file 

example
filename:   test1

values in test1

abc       34rtst               kkkkdafdf
kfl         34rtst               kjdfada;lk
dfa        34rtst               adddfjadf

the file name should be renamed to test1_34rtst

Unix , append value from file to the file name

A scripting language is a programming language that supports scripts, programs written for a special run-time environment that automate the execution of tasks that could alternatively be executed one-by-one by a human operator. Scripting languages are often interpreted (rather than compiled). Primitives are usually the elementary tasks or API calls, and the language allows them to be combined into more complex programs. Environments that can be automated through scripting include software applications, web pages within a web browser, the shells of operating systems (OS), embedded systems, as well as numerous games. A scripting language can be viewed as a domain-specific language for a particular environment; in the case of scripting an application, this is also known as an extension language.

Scripting Languages

Unix is a multitasking, multi-user computer operating system originally developed in 1969 at Bell Labs. Today, it is a modern OS with many commercial flavors and licensees, including FreeBSD, Hewlett-Packard’s UX, IBM AIX and Apple Mac OS-X. Apart from its command-line interface, most UNIX variations support the standardized X Window System for GUIs, with the exception of the Mac OS, which uses a proprietary system.

Unix OS

The term 'shell' refers to a general class of text-based command interpreters most often associated with the UNIX and Linux operating systems. Popular shells include Bourne, Debian Almquist (dash), Korn (ksh), Bourne Again (bash) and the C shell family (csh). Some view the DOS 'cmd' prompt as a minimal shell of sorts. It is also possible to install Cygwin on Windows and emulate a full Unix environment with complete shell capabilities. Terminal emulators, such as xterm, GNOME Terminal and OS X Terminal, can be used to access shell.