Hi,
Could someone tell me how to delete a particular text inside an existing file without opening the file?
e.g. I have a text file called mytext.txt which contains three lines of text below and I want to delete “ ;” and delete the second line “b ;” including the carriage return.

a ;
b ;
c ;

So I want the file to have the contents below:

a
c

Any help will be appreciated.
p.s. I can do this in vi by running “%s/ ;//g” and deleting the second line with dd but I want this done without opening the file.