为什么这个脚本会出错？

Question

为什么这个脚本会出错？

#!/bin/bash
# This script checks whether 
# the current user is root or 
# not.
if [ $UID -ne 0 ] then
    echo "Non-root user."
else
    echo "Root user."
Fi

---

输出

myuser@kali:~$ ./user.sh
./user.sh: line 7: syntax error near unexpected token `else'
./user.sh: line 7: `else'
myuser@kali:~$

Answer 1

您忘记在和;之间添加：ifthen

if [ "$UID" -ne 0 ]; then
    echo "Non-root user."
else
    echo "Root user."
fi

条件结构也以, notif结尾。fiFi

;基本上是换行符的简写。如果您愿意，可以then在下一行中使用来避免;：

if [ "$UID" -ne 0 ]
then
    echo "Non-root user."
else
    echo "Root user."
fi