In general, if you are searching for a substring, you can just specify the text verbatim without supplying any "special" characters. The only time you'd need to do anything special would be if your substring contained a +, ., *, [, ], or \, in which case these characters would need enclosed in quotes and preceded by a backslash. Here are a few more examples of simple substring regular expressions:

• /tmp (scans for the literal string /tmp)
• "\[box\]" (scans for the literal string [box])
• "\*funny\*" (scans for the literal string *funny*)
• "ld\.so" (scans for the literal string ld.so)