bash command to copy file contents from file1 to file2 after particular string/text in file2

Question

Assume file2 content is as below

aaa aaa aaa
bbb bbb bbb
ccc ccc ccc

I want to copy the contents from file1 to file2 after the line that has the string "bbb bbb bbb".

Basically, I want to search for pattern in file2 and paste the contents in the next line after that pattern.

Note: this "bbb bbb bbb" can be at any line no in file2.

Answer 1

It is very easy: try:

sed -i '/bbb bbb bbb/r file1' file2

Answer 2

If you want to save an updated file2, ed to the rescue:

ed -s file2 <<EOF
/^bbb bbb bbb$/r file1
w
EOF

Answer 3

If ed is available.

printf '%s\n' '/^bbb bbb bbb$/r file1.txt' w | ed -s file2.txt