UNIX Shell 에서 if, elif(else if), else, fi 사용 및 condition 비교문

if문 사용법:

echo "num args : $#"
if [ $# -eq 3 ]; then

echo "arg3:"$3

elif [ $# -eq 2 ]; then

echo "arg2:"$2

else

echo "exception"

fi

비교문 :

is equal to: eq
is not equal to: ne
is greater than: gt
is less than: lt
is greater than or equal to: ge
is less than or equal to: le

레퍼런스 : if...elif...fi condition in Unix