Running a bash script from a different location but referencing where the script is located

Question

I wrote a script a while back that would do some simple install procedures in linux for people that don't like the command line, but it seems that they are running the script from a location (such as root). So I have a solution in mind but trying to find out how to reference where the file is located.

Example. I have a script called Install.sh in a folder /root/Server/Scripts/ which references itself by using the following:

SCRIPTSDIR=`pwd`

But I have come into problems with people running this script from root by doing sh Server/Scripts/Install.sh

How could I make SCRIPTS= something that references where the file is located, not where it is being run from?

Thanks, ask if you need more info!

Edit: All answers were good, I meant to put I needed absolute path.

Answer 1

You can get dir with

dirname $0

If your script is called with relative path, dirname will also return relative path. If you want to resolve it for some reason, you can do

readlink -f `dirname $0`

Answer 2

You can use:

SCRIPTDIR=$(dirname $0)

If you need absolute path, then try:

cd $(dirname $0)
SCRIPTDIR=$(pwd)
cd -

Answer 3

您可以添加如下内容：

fullscriptpath=$( dirname $0 )