Prepend a string of characters at the beginning of all files in a given directory

Question

I would like to add login credentials

user: XXX ; pass:YYYY

as text line in all files of a given directory (as a string at the start of each file).

Also i would like to add this only in files with a certain extension .kkk

How can I do that? Thanks

Does this answer your question? [How to insert text before the first line of a file?](https://unix.stackexchange.com/questions/99350/how-to-insert-text-before-the-first-line-of-a-file) — AdminBee, Nov 19 '20 at 09:48

score 1 · Answer 1 · answered Nov 19 '20 at 09:45

You can use sed or awk for that:

sed:
```
sed '1i\user: XXX ; pass:YYY' *.kkk
```

awk:

awk 'BEGIN{print "user: XXX ; pass:YYY"}1' *.kkk

In order to edit the files in-place, use the -i option for sed. For awk this only works since GNU awk version 4.1, when using the -i inplace option.

Update: This question has already answers here and here (and possibly others).

Prepend a string of characters at the beginning of all files in a given directory

1 Answers1