How can solve this( sed: can't read ./src/obj/sedv85rNh: Permission denied ) in litecoin fork port change step

I follow aqua tutorial about fork litecoin

I get problem in replce port number
I get such denied permission problem .sed: can’t read ./src/obj/sedv85rNh: Permission denied
I used this command as tutorial

find . -type f -print0 | xargs -0 sed -i 's/9333/2333/g'

find . -type f -print0 | xargs -0 sed -i ‘s/9332/2332/g’

After that proble I go to sedv85rNh file and change its properties as read and writeable .
After that I run again .
get this next problem.

sed: can’t read ./.git/objects/pack/sedFQiTO6: Permission denied

Please help me how can solve it.

Any update guideline in litecoin fork?

You must try again
for this…

Do you have experience forking litecoin? Help

are you using your command line as an administrator? (“sudo” in linux and mac)