There are multiple ways of doing what you ask.
This is probably the easiest way (assuming your example is accurate):
The -c32-36 tells cut to show characters 32 to 36
Have a look at the cut man page for more details/options.
A more complex solution would be to use awk:
Code:
awk 'BEGIN { FS="[= ]" } { print $6 }' infile
or, using sed:
Code:
sed 's/.*emision=\(.*\) .*/\1/' infile
Up to you to figure out how the last 2 work