Shell程序

[root@sphenis C06]# cat 6_15.sh

[ -f /etc ] || {

echo 1

echo 2

echo 3

}

[root@sphenis C06]# cat 6_34_1.sh

#!/bin/sh

echo -n "pls input a char:"

read var

[ "$var" == "1" ] && {

echo 1

exit 0

}

[ "$var" == "2" ] && {

echo 2

exit 0

}

[ "$var" != "2" -a "$var" != "1" ] && {

echo error

exit 0

}

[root@sphenis C06]# cat 6_34_2.sh

#!/bin/sh

var=$1

[ "$var" == "1" ] && {

echo 1

exit 0

}

[ "$var" == "2" ] && {

echo 2

exit 0

}

[ "$var" != "2" -a "$var" != "1" ] && {

echo error

exit 0

}

[root@sphenis C06]# cat 6_35_1.sh

#!/bin/sh

read -p "Pls input two num:" a b

#no1

[ -z "$a" ] || [ -z "$b" ] && {

echo "Pls input two num again."

exit 1

}

#no2

expr $a + 10 &>/dev/null

RETVAL1=$?

expr $b + 10 &>/dev/null

RETVAL2=$?

test $RETVAL1 -eq 0 -a $RETVAL2 -eq 0 || {

echo "Pls input two "num" again."

exit 2

}

#no3

[ $a -lt $b ] && {

echo "$a

exit 0

}

#no4

[ $a -eq $b ] && {

echo "$a = $b"

exit 0

}

#no5

[ $a -gt $b ] && {

echo "$a > $b"

}

[root@sphenis C06]# cat 6_35_2.sh

#!/bin/sh

a=$1

b=$2

#no1

[ $# -ne 2 ] && {

echo "USAGE:$0 NUM1 NUM2"

exit 1

}

#no1

expr $a + 10 &>/dev/null

RETVAL1=$?

expr $b + 10 &>/dev/null

RETVAL2=$?

test $RETVAL1 -eq 0 -a $RETVAL2 -eq 0 || {

echo "Pls input two "num" again."

exit 2

}

#no3

[ $a -lt $b ] && {

echo "$a

exit 0

}

#no4

[ $a -eq $b ] && {

echo "$a = $b"

exit 0

}

#no5

[ $a -gt $b ] && {

echo "$a > $b"

}

[root@sphenis C06]# cat 6_36_1.sh

#!/bin/sh

cat

1.panxiaoting

2.gongli

3.fanbinbing

END

read -p "Which do you like?,Pls input the num:" a

[ "$a" = "1" ] && {

echo "I guess,you like panxiaoting"

exit 1

}

[ "$a" = "2" ] && {

echo "I guess,you like gongli"

exit 1

}

[ "$a" = "3" ] && {

echo "I guess,you like fangbingbing"

exit 1

}

[[ ! "$a" =~ [1-3] ]] && {

echo "I guess,you are not man."

}

[root@sphenis C06]# cat 6_36_2.sh

#!/bin/sh

path=/server/scripts

[ ! -d "$path" ] && mkdir $path

#menu

cat

1.[install lamp]

2.[install lnmp]

3.[exit]

pls input the num you want:

END

read num

expr $num + 1 &>/dev/null

[ $? -ne 0 ] && {

echo "the num you input must be "

exit 1

}

[ $num -eq 1 ] && {

echo "start installing lamp."

sleep 2;

[ -x "$path/lamp.sh" ] || {

echo "$path/lamp.sh does not exist or can not be exec."

exit 1

}

$path/lamp.sh

exit $?

}

[ $num -eq 2 ] && {

echo "start installing LNMP."

sleep 2;

[ -x "$path/lnmp.sh" ] || {

echo "$path/lnmp.sh does not exist or can not be exec."

exit 1

}

$path/lnmp.sh

exit $?

}

[ $num -eq 3 ] && {

echo bye.

exit 3

}

#[[ ! $num =~ [1-3] ]]&&{

[ ! $num -eq 1 -o ! $num -eq 2 -o ! $num -eq 3 ] && {

echo "the num you input must be "

echo "Input ERROR"

exit 4

}