Please try the below code. 
sub create_db_install_val(){
  $File_name="DB_INSTALL_VALIDATION.sh";
  print "\n Shell name to validate DB Installation Completion is $File
+_name\n";
  $MYSCRIPT=<<SCRIPT;
#!/bin/sh
FILE="/scratch/pratranj/DB_11.2.0.1.0/config/setup.log"
STRING="Completed creating database instance"
EXIT=1
while : ;do
  [[ -f "\$FILE" ]] && grep -q "\$STRING" "\$FILE" && echo "DB Install
+ation is completed" && break
  sleep 5
done
SCRIPT

  open (FILE,">$File_name") or die "cannot open $File_name file";
  print FILE $MYSCRIPT;
  close(FILE);
}

Output:
-------
$ cat DB_INSTALL_VALIDATION.sh
#!/bin/sh
FILE="/scratch/pratranj/DB_11.2.0.1.0/config/setup.log"
STRING="Completed creating database instance"
EXIT=1
while : ;do
  [[ -f "$FILE" ]] && grep -q "$STRING" "$FILE" && echo "DB Installati
+on is completed" && break
  sleep 5
done

[download]
-- The wisest mind has something yet to learn.

In reply to Re: creating Shell Script using Perl by manoj_speed
in thread creating Shell Script using Perl by pratikmonu

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.