Multiple lines added to vim line by line

Question

Can you please help add multiple lines of txt to the file via bash script through vim?

I tried this:

vim -c "3 s/^/
         add-this-line1
         add-this-line2
         add-this-line3/" -c "wq" /var/www/html/webserver/output_file.txt

But, the output of the file looks like this:

3 add-this-line1 add-this-line2 add-this-line3 

What I want to do is, add the lines one by one FROM the line 3 in the output_file.txt not at the line 3 one next to another.

Answer 1

This is more of a job for ed, IMO

seq 10 > file

ed file <<END_ED
3a
first
second
third
.
wq
END_ED

For those new to ed, the line with the dot signals the end of "insert mode".

file now contains:

1
2
3
first
second
third
4
5
6
7
8
9
10