【请问】在shell中用 &&和||替换 if else语句

zwrvvv

想吧if else 语句结构换成&&和||  ，遇到问题请大牛指点~


if [ "$HOSTNAME" = linux ]
then
echo "local hostname is linux"
else
echo "local hostname is $HOSTNAME"
fi
转换成&& || 如下

[ "$HOSTNAME" = linux ] && echo "local hostname is linux" || echo "local hostname is $HOSTNAME"

################################################
问题： 能不能把  if   elif else fi  转换成&&  ||
example:

echo $HOSTNAME
if [ "$HOSTNAME" = linux ]
then
echo "local hostname is linux"
elif [ "$OSTYPE" = linux ]
then
echo "local ostype is linux"
else
echo "local hostname is $HOSTNAME"
fi
转换成&&  || 样式

fllintel

不清楚..期待高手.......

ywlscpl

用{ }

zwrvvv

回复 3# ywlscpl


    请ywlscpl 大哥明解，{:3_182:}

sunbw001

[ "$HOSTNAME" = linux ] && echo "local hostname is linux" || { [ "$OSTYPE" = linux ] && echo "local ostype is linux" ||echo "local hostname is $HOSTNAME";}

ywlscpl

fllintel

[ "$HOSTNAME" = linux ] && echo "local hostname is linux" || { [ "$OSTYPE" = linux ] && echo "local  ...
sunbw001 发表于 2010-03-17 15:26

    学习.........

zwrvvv

多谢各位大哥，马上做了测试，有遇到问题，
193:~ # [ 1 = 1 ] >/dev/null 2>&1 && echo "11111111111" ||{[ 2 = 2 ] >/dev/null 2>&1 && echo "22222222" ||echo "33333333333333"}
11111111111
22222222
======================================================
193:~ # [ 1 = 2 ] >/dev/null 2>&1 && echo "11111111111" ||{[ 2 = 2 ] >/dev/null 2>&1 && echo "22222222" ||echo "33333333333333"}
33333333333333}
======================================================
193:~ # [ 1 = 2 ] >/dev/null 2>&1 && echo "11111111111" ||{[ 2 = 2 ] >/dev/null 2>&1 && echo "22222222" ||echo "33333333333333" ;}
-bash: syntax error near unexpected token `}'
======================================================
193:~ # [ 1 = 2 ] >/dev/null 2>&1 && echo "11111111111" ||{[ 2 = 3 ] >/dev/null 2>&1 && echo "22222222" ||echo "33333333333333"}
33333333333333}
======================================================
193:~ # [ 1 = 1 ] >/dev/null 2>&1 && echo "11111111111" ||{[ 2 = 3 ] >/dev/null 2>&1 && echo "22222222" ||echo "33333333333333"}
11111111111
22222222
======================================================

fllintel

[ 1 = 1 ] >/dev/null 2>&1 && echo "11111111111" ||{([ 2 = 2 ] >/dev/null 2>&1 && echo "22222222" ||echo "33333333333333")}

sunbw001

1. ([ 1 = 1 ] >/dev/null 2>&1) && echo "11111111111" ||{([ 2 = 2 ] >/dev/null 2>&1) && echo "22222222" ||echo "33333333333333";}

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