How to edit .sav files?

Question

linux

pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa pa

Answer 1

sed -i text.txt -e '/hi world/a text here'

Answer 2

Solution in the forehead does not work?
sed 's/hi world/hi world\nnew string/g

Answer 3

It all depends on the chosen format.
https://habr.com/ru/post/163071/
if there was serialization in xml and then zip compressions, then you need to unpack and then edit with a text editor.
In general, how to pack - and unpack, if the game is not yours but you really want to fix it - then analyze the file format, compare different saves, etc.