I want to search
$GLOBALS["\x61\156\x75\156\x61"] using grep but " and / not working perfectly.
grep -rl "$GLOBALS["\x61\156\x75\156\x61"]" <filename>
$GLOBALS["\x61\156\x75\156\x61"] is a virus malware starting code, lots of files are affected. I have a script through I want search effected files and remove top line
Since you are looking for an exact match and you don't want the expression to be interpreted by grep, you have to use -F and single quotes to avoid the variable being expanded:
grep -Frl '$GLOBALS["\x61\156\x75\156\x61"]' <filename>
^ ^ ^
From man grep:
-F, --fixed-strings
Interpret PATTERN as a list of fixed strings, separated by newlines, any of which is to be matched. (-F is specified by POSIX.)
See another example of the usage of -F together with single quotes:
We create a file like this:
$ cat a
hello
${myarray[0]}
bye
And an array:
$ myarray=('hello' 'how' 'are' 'you')
Let's use single quotes and look for the value:
$ grep '${myarray[0]}' a
$
Let's use fixed string with double quotes -> it gets interpreted!
$ grep -F "${myarray[0]}" a
hello
Let's use -F and single quotes:
$ grep -F '${myarray[0]}' a
${myarray[0]} #this works!
GLOBALSrefers to an associative array? Or are you trying to search for literal text equal to$GLOBALS["\x61\156\x75\156\x61"]?