linux - 隐藏命令未找到 bash 脚本

Question

如何隐藏 bash 脚本中未找到的命令？我很好奇，因为除了草率的“命令未找到消息”之外，一切都运行良好

read user_name
if $user_name && exit 2> /dev/null
then
        exit 0
elif egrep "^${user_name}": /etc/passwd 2> /dev/null
then
        finger $user_name
        exit 0
elif
        until egrep "^${user_name}:" /etc/passwd || $user_name && "exit"  2> /dev/null
        do
        echo "try again or type exit to quit"
        read user_name
        if egrep -i "^${user_name}": /etc/passwd
        then
                finger $user_name
        fi
        done
then
        finger $user_name
        exit 0



fi

这是我遇到的错误

 ./project.sh: line 49: (myusernameisherebutimhidingit): command not found

Answer 1

问题是您尝试在多个位置运行命令 $user_name，您可能希望将 $user_name 替换为检查用户名的值。