Shell Programming and Scripting

 
#!/usr/bin/perl -w
$file = "/home/output.txt"
$grep_line = "closing zip for topic[radio]";
`grep $grep_line* $file`;

Scalar found where operator expected at ./Perl1 line 3, near "$grep_line"
    (Missing semicolon on previous line?)

#!/usr/bin/perl -w
$file = "/home/output.txt";
$grep_line = 'closing zip for topic\[radio\]';
print `grep "$grep_line" $file`;