Retrieve parent directory of script

Just get the parent of the parent directory:

my_app_path=$(dirname $(dirname $(readlink -f "$0")))

I put this answer as comment at 2018. But since I got a great feedback about the effectiveness of the solution, I will share it here as well :

# dir of script 
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )";
# parent dir of that dir
PARENT_DIRECTORY="${DIR%/*}"

How about using dirname twice?

APP_ROOT="$(dirname "$(dirname "$(readlink -fm "$0")")")"

The quoting desaster is only necessary to guard against whitespace in paths. Otherwise it would be more pleasing to the eye:

APP_ROOT=$(dirname $(dirname $(readlink -fm $0)))

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