redirection to file with '>' is not work

Question

I want to redirect the result of 'lsof' to a file, but it does not work like this.

$ sudo ./lsof > result.txt
-bash: result.txt:

Is there anyone why it does not work?

Answer 1

Because may be you do not have permission to wrote to file. Try following:

sudo lsof | sudo tee results.text

Or

sudo -s

lsof | tee results.txt