Can't run a shell script [duplicate]

Solution 1:

Right click on the file, then choose "Properties". From the dialog check the "Allow executing file as program" like in the picture below. Then close the dialog and double-click on the file to execute.

Solution 2:

First you need to make your file executable,

in directory type,

sudo chmod+x flipscreen.sh

sudo bash flipscreen.sh

Solution 3:

OpenNingia's answer will work, but for those who will come googling later, you can also do through the commandline:

open terminal, and goto the folder where your script is located

chmod +x <yourScript>

then execute it as

./<yourScript>