cut is quite handy when we do bash script.

gobukgumuk.txt
tomulikud om tuod, tomoguang om gobuk

$cat gobukgumuk.txt | cut -d, -f2
will give "tomoguang om gobuk"

$cat gobukgumuk.txt | cut -c1-9
will give "tumolikud"

we can save the output to a variable name

name=`who am i | cut -f1 -d' '`

cut command tutorial
how to select column from a file
cut command