Terminal Permission Error?

[Laniakea]

I am going to merge my sd card with my internal storage, adopted sd card trick. I don't have any ways to connect my phone to my computer right now so I rooted my phone to use terminal instead of adb on Windows. But I get this error when I follow the guide for the adb way according to this article: https://www.google.com.tr/amp/s/forum.xda-developers.com/p8lite/help/how-to-extend-storage-using-sd-card-t3614396/amp/

Help out please, I have limited time.

[Sauron]

try using 'sudo'

sudo sm set-force-adoptable true

 

[Laniakea]

I get this:

 

/system/bin/sh: sudo: not found

[Sauron]

17 minutes ago, LOLLIPOPSJSJSJ said:

I get this:

 

/system/bin/sh: sudo: not found

install this and install sudo, then try again

 

-edit-

alternatively try running 'su' and then running your commands from there (without sudo)