simple sed question

[mynot]

Hello,
I want to add a line containing xyz after a line containing abc (there is only one of them) in about 60 files. I can do it with a command:
sed 's/abc/abc\nxyz/' <infile >outfile
How do I do this for all the files? I've looked at several tutorials and "Linux in a Nutshell" but can't work it out.
Thanks
Tony

[Cabhan]

Be aware that your sed command will split a line if that lines contains "abc" and does not ONLY contain "abc". For instance, if the input was:

abcdef

then your code would change it to:

abc
xyzdef

If you want to add a new line after any line CONTAINING and not necessary EQUALLING "abc", you could do:

sed -e '/abc/ a xyz

This would append the line "xyz" after any line containing "abc".

In any case, this is not your main question.

There are basically two ways to do this for multiple files. Both involve writing a script: an executable file that contains mutliple commands. If the files match a pattern, you can do something simple:

for file in *.txt; do
    sed 's/abc/abc\nxyz/' < "$file" > "$file.new"
done

On the other hand, if it's a bit more complicated and you want to specify each file, you could do:

for file in "$@"; do
    sed 's/abc/abc\nxyz/' < "$file" > "$file.new"
done

Be aware that this second one can be used with the first approach (the script could be invoked as "./script *.txt").

Does this make sense?

[mynot]

Cabhan,
Perfect. The first script was just the example I needed.
Thanks
Tony