Shell流程控制
if 分支
格式:
if condition
then
command1
......
fi
一行用;号隔开
if cond; then command1; fi
if else分支
if condition
then
command1
......
else
command2
fi
if else-if else
if condition
then
command1
elif condition
then
command2
else
commandN
fi
for循环
格式:
for var in it1 it2 itN
do
cm1
cm2
done
while循环
while condition
do
command
done
until循环
until condition
do
command
done
case 语句
case cond in
mode1)
cmd1
cmd2
;;
mode2)
cmd1
cmd2
;;
*)
全部不匹配
;;
esac
break和continue
break命令跳出所有循环
continue跳出本次循环