本文共 1348 字，大约阅读时间需要 4 分钟。

1. ????????? test.sh ??????????????????

#!/bin/bash
# ?? test.sh ??????????
if [ -f /home/test.sh ] && [ -x /home/test.sh ]; then
    echo 'test.sh ????????'
else
    echo 'test.sh ??????????'
fi

2. ??????100???????????

#!/bin/bash
# ?????????
read -p "???????(?): " score
# ???????
if ! [ "$score" -eq "$score" ]; then
    echo '????????'
elif [ $score -gt 0 ] && [ $score -le 10 ]; then
    echo '???'
    # ??????
    read -p "?????(?/?): " sex
    if [ $sex = "?" ]; then
        echo '?????'
    elif [ $sex = "?" ]; then
        echo '?????'
    else
        echo '??????'
    fi
elif [ $score -gt 10 ]; then
    echo '???'
else
    echo '????'
fi

3. ? case ?????????????

#!/bin/bash
# ???????????
read -p "??????????: " a
case $a in
    *.tar.gz)
        tar -zxvf "$a" -C /opt
    ;;
    *.tar.bz2)
        tar -jxvf "$a" -C /opt
    ;;
    *)
        echo "??????"
esac

4. ?????????

#!/bin/bash
# ?????????
read -p "?????: " number
# ???????
if [ "$number" -eq "$number" ]; then
    echo "$number ???"
else
    echo "$number ????"
fi

5. ???????????

#!/bin/bash
# ?????????
read -p "?????: " number
# ???????
if [ "$number" -eq "$number" ]; then
    let remainder="$number" % 2
    if [ $remainder -eq 0 ]; then
        echo "$number ???"
    else
        echo "$number ???"
    fi
else
    echo "$number ????"
fi

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