diff --git a/Linux_reinstall/Alpine/alpineInit.sh b/Linux_reinstall/Alpine/alpineInit.sh
index 00c8e61..0ff7823 100644
--- a/Linux_reinstall/Alpine/alpineInit.sh
+++ b/Linux_reinstall/Alpine/alpineInit.sh
@@ -6,7 +6,7 @@
 # Parameters of outputs of "stty": https://www.ibm.com/docs/en/aix/7.3?topic=s-stty-command
 for ttyItems in "/dev/tty0" "/dev/ttyS0" "/dev/ttyAMA0"; do
 	ttyAttribute=$(stty -F "$ttyItems")
-	[[ -n "$ttyAttribute" && -n $(echo "$ttyAttribute" | grep -io "\-brkint ixoff \-imaxbel") ]] && {
+	[[ -n "$ttyAttribute" && -n $(echo "$ttyAttribute" | grep -io '\-brkint' | grep -io 'ixoff' | grep -io '\-imaxbel') ]] && {
 		break
 	}
 done