交互式传参

read

相关示范

sys.sh

#!/bin/bash
echo "Which Operating System are you using?"
echo "Windows, Android, Chrome, Linux, Others?"
read -p "Type your OS Name:" OS
case $OS in
    Windows|windows|window|win)
        echo "That's common. You should try something new."
        echo
        ;;
    Android|android)
        echo "This is my favorite. It has lots of applications."
        echo
        ;;
    Chrome|chrome)
        echo "Cool!!! It's for pro users. Amazing Choice."
        echo
        ;;
    Linux|linux)
        echo "You might be serious about security!!"
        echo
        ;;
    *)
        echo "Sounds interesting. I will try that."
        echo
        ;;
esac

which Operating System are you using?
Windows, Android, Chrome, Linux, Others?
Type your OS Name:linux
You might be serious about security!!

ip-check.sh

ip检查

 #!/bin/bash
    read -p "please input a number:" -s IP（-p 后跟提示内容  -s 表示不显示输入的内容）
    echo " "
    ping -c1 -w1 $IP &> /dev/null && echo $IP is up || echo $IP is down

ping.sh

根据退出判断该ip网是否通；sh ping.sh 192.168.11

    #!/bin/bash
    [ -z $1 ]&&{
            echo "please input a IP"
            exit 1
    }
    ping -c1 -w1 $1 &> /dev/null
    [ $? = 0 ]&& echo $1 is up || echo $1 is down

用户文件和密码文件建立用户

#!/bin/bash
read -p "please input a userfile:" USER
[ ! -e $USER ] && {
        echo "$USER is not exist"
        exit 1
}
read -p "please input a passwdfile:" PASS
[ ! -e $PASS ] && {
        echo "$PASS is not exist"
        exit 1
}
MAX_LINE=`wc -l $USER | cut -d " " -f 1`
for LINE_NUM in `seq 1 $MAX_LINE`
do
        USERNAME=`sed -n "${LINE_NUM}p" $USER`
        PASSWD=`sed -n "${LINE_NUM}p" $PASS`
        useradd $USERNAME
        echo $PASSWD | passwd --stdin $USERNAME
done

使用函数作用

1.简化脚本内容，使脚本可读性更高。2.可以重复多次调用

#!/bin/bash
ACTION_ADD(){
        [ "$1" = add ]&&{
                read -p "please input a username:" USERNAME
                read -p "please input a password:" -s PASSWORD
                echo ""
                useradd $USERNAME
                echo $PASSWORD | passwd --stdin $USERNAME
        }
}
ACTION_DEL(){
        [ "$1" = del ]&&{
                read -p "please input a username:" USERNAME
                userdel -r $USERNAME
        }
}
USER_CTL(){
        read -p "please input action:" ACTION
        [ "$ACTION" = exit ]&&{
                echo bye~~
                exit 0
        }
        ACTION_ADD $ACTION
        ACTION_DEL $ACTION
        USER_CTL
}
USER_CTL