Prepend a text to a file.

echo "text to prepend" | cat - file
Prepend text to a file. It doen't need temporary files, ed or sed.

By: leni536
2013-12-18 15:54:17

4 Alternatives + Submit Alt

What Others Think

This does not prepend to the file. It only prints it out before printing out the file. The original file is unchanged. It's no better than running this: echo "text to prepend";cat file
tlemerond · 356 weeks ago
If you want to use the original and actually modify the file: echo "text to prepend" | cat - file > file
tlemerond · 356 weeks ago
My bad, you can't use the same input and output file with cat. Best to use sed with the -i option.
tlemerond · 356 weeks ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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