How to program a bash script to delete characters?

Question

linux

Hello!
In the head, the brake, I confess honestly.
It is necessary to do something, in general:
To wipe/replace characters in a certain document after executing the command.
As I understand it, this can be done through nano / vi, and in bash itself, just specify the order of the commands?
upd:
Sample text:
line1/qweqwe
line2/qweqwe
two lines
to remove
Sample result:
line1
line2

Answer 1

sed s/lala/blabla/g -i filename
www.tldp.org/LDP/Bash-Beginners-Guide/html/Bash-Be...

Answer 2

sed will most likely help:
sed -i "s/Тостер/Хабрахабр/" diplom.txt