Bash-"fi ;;"的用途是什么? [英] Bash - what's the use of "fi ;;"?

问题描述

我到处都在寻找解释.这是取自apt-fast.sh脚本的真实示例:

I have been searching everywhere for an explanation. Here's a real example taken from the apt-fast.sh script:

if [ ! -x /usr/bin/axel ]
then echo "axel is not installed, perform this?(y/n)"
    read ops
    case $ops in
     y) if apt-get install axel -y --force-yes
           then echo "axel installed"
        else echo "unable to install the axel. you are using sudo?" ; exit
        fi ;;
     n) echo "not possible usage apt-fast" ; exit ;;
    esac
fi

if块中间的"fi ;;"有什么用?

推荐答案

fi关闭if语句，而;;关闭case语句中的当前条目.

fi closes the if statement, while ;; closes the current entry in the case statement.

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