Add lines to a file bash

how to add lines inside a file

sed -i -e "50r../../../../folder1/lines_to_add.txt" a.txt 

a.txt - the file you want to change.
50r is line number of a.txt 
some lines are inside lines_to_add.txt file
../../../../folder/lines_to_add.txt 
-i update a.txt, try without -i before runthe code,
be carefull with "newlines", 
"keep a newline at the end of lines_to_add.txt"

Similar codes

3 votes113 views4 answers
Install pytest
Shell/Bash
0 vote167 views1 answer
How to add source ip in firewalld
Shell/Bash
0 vote123 views2 answers
Sbatch cancel job
Shell/Bash
-1 vote120 views1 answer
How to get list port linux cmd
Shell/Bash
1 vote130 views2 answers
Find ignore hidden files
Shell/Bash
1 vote146 views5 answers
Enable ssh linux
Shell/Bash
0 vote110 views1 answer
Print first word of each line by grep
Shell/Bash
1 vote123 views2 answers
Show mongodb version
Shell/Bash
14 votes145 views6 answers
How to install bootstrap in angular 11
Shell/Bash
3 votes125 views1 answer
How to install gh-pages
Shell/Bash