23. 脚本:控制输入
a=""
b="chupeng"
[ -n "$a" -a "$a" = "$b" ] && echo yes|| echo no
[[ -n "$a" && "$a" = "$b" ]] && echo yes || echo no
3.只能输入1or2的脚本
vim and_or.sh
#!/bin/bash
read -p "pls input a char:" var1
[ "$var1" -eq "1" ] && {
echo $var1
exit 0
}
[ "$var1" = "2" ] && {
echo $var1
exit 0
}
[ "$var1" != "2" -a "$var1" != "1" ] && {
echo "you must input 1 or 2!"
exit 1
}
4.安装lnmp/lamp脚本
#lamp.sh lnmp.sh
echo "echo lamp is installed" >./lamp.sh
echo "echo lnmp is installed" > ./lnmp.sh
chmod +x ./*
vim lamp_lnmp.sh
#!/bin/bash
#判断脚本文件路径是否存在
path=/myscripts
[ ! -d "$path" ] && mkdir $path -p
#提示信息
cat <<END
1.[install lamp]
2.[install lnmp]
3.[exit]
pls input the number you want:
END
#读取输入信息并判断
read num
expr $num +1 &> /dev/null
[ $? -ne 0 ] && {
echo "the num you input must be {1|2|3}"
exit 1
}
#选择1的情况
[ "$num" -eq "1" ] && {
echo "start installing lamp..."
sleep2
[ -x "$path/lamp.sh" ] || {
echo "the lamp.sh does not exist or can't be exec."
exit 1
}
$path/lamp.sh
exit $?
}
#选择2的情况
[ "$num" -eq "2" ] && {
echo "start installing lnmp..."
sleep 2
[ -x "$path/lnmp.sh" ] || {
echo "lnmp.sh is error..."
exit 1
}
$path/lnmp.sh
exit $?
}
#选择3
[ "$num" -eq 3 ] && {
echo "bye..."
exit 3
}
#限制用户必须输入1|2|3
[[ ! "$num" = ~ [1-3] ]] && {
echo "you must input num in {1|2|3}"
exit 4
}
最后更新:
2022-02-19 13:59:07