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if list then
do something here
elif list then
do another thing here
else
do something else here
fi
EX1:
#!/bin/sh
SYSTEM=`uname -s` #»ñÈ¡²Ù×÷ϵͳÀàÐÍ£¬ÎÒ±¾µØÊÇlinux
if [ $SYSTEM = "Linux" ] ; then #Èç¹ûÊÇlinuxµÄ»°´òÓ¡linux×Ö·û´®
echo "Linux"
elif [ $SYSTEM = "FreeBSD" ] ; then
echo "FreeBSD"
elif [ $SYSTEM = "Solaris" ] ; then
echo "Solaris"
else
echo "What?"
fi #ifend
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int1 -ne int2¡¡¡¡¡¡¡¡Á½Êý²»µÈÎªÕæ
int1 -gt int2¡¡¡¡¡¡¡¡int1´óÓÚint2ÎªÕæ
int1 -ge int2¡¡¡¡¡¡¡¡int1´óÓÚµÈÓÚint2ÎªÕæ
int1 -lt int2¡¡¡¡¡¡¡¡int1СÓÚint2ÎªÕæ
int1 -le int2¡¡¡¡¡¡¡¡int1СÓÚµÈÓÚint2ÎªÕæ
3 ÎļþµÄÅжÏ
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• Linux kernel diagram
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