UNIX for Dummies Questions & Answers

I AM TRYING TO APPEND THE HOSTNAME OF A UNIX SERVER I WORK WITH SO I COULD DO A LOADING INTO A DATABASE.

THE COMMAND I AM USING IS
df -k | sed 's/^/dataserver /'

What I intend to do is append the hostname dynamically by using the hostname command instead of having to manually enter the name of the server in the command line. I have tried
df -k | sed 's/^/hostname /' and so many other variations. please is this possible and whats the way out.
Thank you.

Try:
df -k | sed "s/^/`hostname` /"

Get the quoting right. This uses double quotes and backquotes. It does not use single quotes.