Inserting text into a file after a particular line reading form another file

[Nirupam]

Hi All
I got some problem I have a file(Eg File1) which contains some text and after 12th line I want to insert one line from another file(Eg File2) can any body help me out how to write a script so as to satisify my cause

Thanks in advance

[James R. Ferguson · Accepted solution]

Hi:

You could do this:

# sed -n '1,12p' file1 > file.out
# sed -n '1p' file2 >> file.out
# sed -n '13,$p' file1 >> file.out

...JRF...

[Ravi_8]

hi,

open both files using vi (vi file1 file2)
in file1 at 12th line press 'o' which creates a blank line. switch over to file2(esc, :!2)
yank the line you wanted from file2 , again switch to file1 and put in blank line.

[Fred Martin_1]

If file2 is the file you want to insert into - you could do this:

awk '{if(NR<12){print}}' file2 > tmpfile
somehow print the one line >> tmpfile
awk '{if(NR>11){print}}' file2 >> tmpfile
cp tmpfile file2 ; rm tmpfile

The first line prints the first 11 lines of file 2. The second line, supplied by you, adds in the line from the other source. The third line adds the remainder of file 2. Line 4 replaces file 2 with the new version.

Note this could be made more efficient, if you have a very large file2. Awk could be told to exit when it has nothing else to do, rather than have it go through all the lines in the file regardless.

Fred

[Robin Wakefield]

or...

head -12 file1;cat file2;tail +13 file1

Robin