grep exact match

I need to `grep` for an exact match on a list of results from an `ls` command. For example, if i `ls` a directory and here are the results: ``` system sys sbin proc init.rc init.mahimahi.rc init.goldfish.rc init ``` I would like to `grep` to see if a file exists that is named "init". I need the `grep` to only return the one result. There is only one file named "init" in the list. I am performing this operation on an android device. So here is the full command: ``` adb shell ls / | grep -E "^init$" ``` I need to check the existence of a directory on the android device and then perform an action if the directory exists. I have done this before using `find` in a batch script, but i need to do this on linux using `bash` and i want an exact match. This will avoid the issue if there is another directory or file that contains the string i am searching for. I have tried the suggestions in the following links, but they all return no result when i give "init" as the parameter. how-to-grep-the-exact-match match-exact-word-using-grep