Using the sed -i (inline), you can replace the beginning of the first line of a file without redirecting the output to a temporary location.
Syntax: $ prepend content to add [filename] Uses ed, so no temp files created.
The original command is great, but I often want to prepend to every line. Show Sample Output
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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echo "text to prepend";cat file
echo "text to prepend" | cat - file > file