Welcome to SO and Android development.
As I can see in your screenshot you are using PowerShell, not CMD; there's a PS
at the start of each line.
In PS to call a file in the current directory you need to prefix it with ./
, where the dot represents the current directory, and followed by the complete filename. Thus, in this case you need to type ./gradlew.bat signingReport
. From the screenshot it isn't clear if gradlew.bat
is indeed in the current folder though.
The same goes for keytool.exe
, which is most likely not in the same folder as gradlew.bat
.
In any case be sure you autocomplete the files you are calling by pressing the Tab key; for example, type gradl
and press the Tab key multiple times till you reach the file you are looking for. This is the best way to avoid typos.
Sidenote
This problem has nothing to do with Android, Flutter, Firebase or SHA. Please be sure to correctly tag your questions in order to get the best possible answer. In this case, PowerShell is more fitting.