for jdir in /usr/lib/jvm/java-[67]-openjdk* /usr/lib/jvm/java-6-sun; do
if [ -x $jdir/bin/java ]; then
break
fi
done
请问这里的-x是什么意思,这是shell编程吗?
for jdir in /usr/lib/jvm/java-[67]-openjdk* /usr/lib/jvm/java-6-sun; do
if [ -x $jdir/bin/java ]; then
break
fi
done
请问这里的-x是什么意思,这是shell编程吗?