How to echo to file with sudo - using tee?
		Often we want to 
  To append to a file add 
    echo some content into file, for
which we need root permissions. There is a command tee
to help with that. It will display passed string and at the same
time write it to file.
Example of trimming log file:
echo "" | sudo tee error.log
  To append to a file add -a parameter to tee:
echo "manual" | sudo tee -a mysql.override
 
             
			