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Bash：语法错误 - 令牌“else”附近出现意外

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Bash：语法错误 - 令牌“else”附近出现意外

好吧，我完全不明白为什么 bash 会向我抛出这个错误。我创建了一个脚本来检查驱动器是否安装在目录中。如果安装了驱动器，它会执行一些 rsync 任务（并将状态打印到日志中）。如果它没有安装，它应该给我发电子邮件（从代码中编辑的邮件）。

但每当我运行此代码时，它都会向我抛出“语法错误：‘else’附近出现意外标记”。为什么会出现这个语法错误？

我尝试使用 1 [ en 2 [[ 和 f 语句，在 sudo 下运行脚本，但没有骰子。

在代码中添加了额外的注释，以便您可以看到逻辑；）。

#!/bin/bash
#Print to log that check is starting
printf "Checking if Backup drive is successfully mounted\n" >>/home/fileserver/Applications/Backup/logs/backup.log 2>&1 &&

# Start check
if [[ $(mount | grep -c /home/fileserver/Backup4TB) != 0 ]]; then

# If check is successfull, print it to log & start the backup
printf "Backup Drive successfully mounted, Backing up Applications folder to USB Backup Drive\n" >>/home/fileserver/Applications/Backup/logs/backup.log 2>&1 &&

# Backup using rsync
rsync --log-file=/home/fileserver/Applications/Backup/logs/rsync.log -avhP --delete /home/fileserver/Applications/ /home/fileserver/Backup4TB/Applications >/dev/null 2>&1 &&

# Print to log
printf "Backing up Books folder to USB Backup Drive\n" >>/home/fileserver/Applications/Backup/logs/backup.log 2>&1 &&

# Backup using rsync
rsync --log-file=/home/fileserver/Applications/Backup/logs/rsync.log -avhP --delete /home/fileserver/Media/Books/ /home/fileserver/Backup4TB/Books >/dev/null 2>&1 &&

# SYNTAX ERROR IS HERE - If check is unsuccessfull
else

# Print error to log
printf "ERROR - Mount was insuccesfull, sending email as warning\n" >>/home/fileserver/Applications/Backup/logs/backup.log 2>&1 &&

# Email me
/usr/sbin/ssmtp "MYEMAIL" < /home/fileserver/Applications/Backup/mountingerror/mountingerrorBackup.txt

fi

答案1

是的，找到了：我将 && 放在最后一个命令之后，就在 else 语句之前：

...

# Backup using rsync
rsync --log-file=/home/fileserver/Applications/Backup/logs/rsync.log -avhP --delete /home/fileserver/Media/Books/ /home/fileserver/Backup4TB/Books >/dev/null 2>&1 &&

# SYNTAX ERROR IS HERE - If check is unsuccessfull
else

...

通过删除 &&，错误消失：

...

# Backup using rsync
rsync --log-file=/home/fileserver/Applications/Backup/logs/rsync.log -avhP --delete /home/fileserver/Media/Books/ /home/fileserver/Backup4TB/Books >/dev/null 2>&1 

# SYNTAX ERROR IS HERE - If check is unsuccessfull
else

...

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