Add text between two patterns in File using sed command - linux

Question

I want to add Some large code between two patterns:
File1.txt
This is text to be inserted into the File.
infile.txt
Some Text here
First
Second
Some Text here
I want to add File1.txt content between First and Second :
Desired Output:
Some Text here
First
This is text to be inserted into the File.
Second
Some Text here
I can search using two patterns with sed command ,But I don't have idea how do I add content between them.
sed '/First/,/Second/!d' infile

Answer 1

Since /r stands for reading in a file, use:
sed '/First/r file1.txt' infile.txt
You can find some info here: Reading in a file with the 'r' command.
Add -i (that is, sed -i '/First/r file1.txt' infile.txt) for in-place edition.
To perform this action no matter the case of the characters, use the I mark as suggested in Use sed with ignore case while adding text before some pattern:
sed 's/first/last/Ig' file
As indicated in comments, the above solution is just printing a given string after a pattern, without taking into consideration the second pattern.
To do so, I'd go for an awk with a flag:
awk -v data="$(<patt_file)" '/First/ {f=1} /Second/ && f {print data; f=0}1' file
Given these files:
$ cat patt_file
This is text to be inserted
$ cat file
Some Text here
First
First
Second
Some Text here
First
Bar
Let's run the command:
$ awk -v data="$(<patt_file)" '/First/ {f=1} /Second/ && f {print data; f=0}1' file
Some Text here
First # <--- no line appended here
First
This is text to be inserted # <--- line appended here
Second
Some Text here
First # <--- no line appended here
Bar

Answer 2

i think you can try this
$ sed -n 'H;${x;s/Second.*\n/This is text to be inserted into the File\
&/;p;}' infile.txt

Answer 3

awk flavor:
awk '/First/ { print $0; getline < "File1.txt" }1' File2.txt

Answer 4

Here's a cut of bash code that I wrote to insert a pattern from patt_file. Essentially had had to delete some repetitious data using uniq then add some stuff back in. I copy the stuff I need to put back in using lineNum values, save it to past_file. Then match patMatch in the file I'm adding the stuff to.
#This pulls the line number from row k, column 2 of the reduced repitious file
lineNum1=$(awk -v i=$k -v j=2 'FNR == i {print $j}' test.txt)
#This pulls the line number from row k + 1, coulmn 2 of the reduced repitious file
lineNum2=$(awk -v i=$((k+1)) -v j=2 'FNR == i {print $j}' test.txt)
#This pulls fields row 4, 2 and 3 column into with tab spacing (important) from reduced repitious file
awk -v i=$k -v j=2 -v h=3 'FNR == i {print $j" "$h}' test.txt>closeJ.txt
#This substitutes all of the periods (dots) for \. so that sed will match them
patMatch=$(sed 's/\./\\./' closeJ.txt)
#This Selects text in the full data file between lineNum1 and lineNum2 and copies it to a file
awk -v awkVar1=$((lineNum1 +1)) -v awkVar2=$((lineNum2 -1)) 'NR >= awkVar1 && NR <= awkVar2 { print }' nice.txt >patt_file.txt
#This inserts the contents of the pattern matched file into the reduced repitious file
#The reduced repitious file will now grow
sed -i.bak "/$patMatch/ r "patt_file.txt"" test.txt