shell脚本

#shell 脚本随机数
#!/bin/bash

echo -e “\033[34m 游戏开始！！！ \033[0m”

while :
do
random_number=$(shuf -i 10-99 |head -1)
# echo $random_number

    for i in $(seq 3)
    do
            read -p "请输入你猜的数字大小：" guess_number

            if [ $random_number -gt $guess_number ]
            then
                    echo "猜小了！"
            elif [ $random_number -lt $guess_number ]
            then
                    echo "猜大了！"
            else
                    read -p "恭喜你，猜对了，是否继续玩游戏（y/n）：" judge
                    if [ $judge == "Y" -o $judge == "y" ]
                    then
                            break
                    else
                            echo -e "\033[34m 欢迎大佬下次在玩！\033[0m"
                            exit
                    fi
            fi
            echo "你还有$(expr 3 - $i)次机会！"
            if [ $(expr 3 - $i) == 0 ]
            then
                    read -p "恭喜你，猜对了，是否继续玩游戏（y/n）：" judge
                    if [ $judge == "Y" -o $judge == "y" ]
                    then
                            break
                    else
                            echo -e "\033[34m 欢迎大佬下次在玩！\033[0m"
                    fi
                    exit
            fi
    done

done

#小行星 金字塔，形如（脚本）
#!/bin/bash

for I in seq 1 2 9; do
for ((M=0;M<=$[(9-$I)/2];M++));do
echo -n " "
done
for ((J=0;J<I;J++)); do
echo -n “*”
done
for ((K=0;K<=$[9-$J];K++)); do
echo -n " "
done
for ((M=0;M<=$[(9-$I)/2];M++));do
echo -n " "
done
echo -e “\n”
done

获取随机8位字符串：

方法1：
echo $RANDOM |md5sum |cut -c 1-8
471b94f2

方法2：
openssl rand -base64 4
vg3BEg==

方法3：
cat /proc/sys/kernel/random/uuid |cut -c 1-8
ed9e032c

定义一个颜色输出字符串函数
方法1：
function echo_color() {
if [ $1 == “green” ]; then
echo -e “\033[32;40m$2\033[0m”
elif [ $1 == “red” ]; then
echo -e “\033[31;40m$2\033[0m”
fi
}

方法2：
function echo_color() {
case $1 in
green)
echo -e “\033[32;40m$2\033[0m”
;;
red)
echo -e “\033[31;40m$2\033[0m”
;;
*)
echo “Example: echo_color red string”
esac
}
使用方法：echo_color green “test”
function关键字定义一个函数，可加或不加。

批量创建用户
#!/bin/bash
DATE=$(date +%F_%T)
USER_FILE=user.txt
echo_color(){
if [ $1 == “green” ]; then
echo -e “\033[32;40m$2\033[0m”
elif [ $1 == “red” ]; then
echo -e “\033[31;40m$2\033[0m”
fi
}

来源：CSDN

作者：安筱~~

链接：https://blog.csdn.net/weixin_44882388/article/details/103738637