Shell腳本tar錯誤

Question

遇到在shell備份腳本上通過tar壓縮文件夾的問題。

# Path to backup directories 
DIRS="/home/bob /var/www /root" 

# Store todays date 
NOW=$(date +"%F") 

# Store backup path 
BACKUP="/backup" 
BACKUPDIR="$BACKUP/daily/calendar/$NOW" 

# Backup file name hostname.time.tar.gz 
BFILE="dirs.tar.gz" 

$TAR -zcvf ${BACKUPDIR}/${BFILE} "${DIRS}" 
echo $TAR -zcvf ${BACKUPDIR}/${BFILE} "${DIRS}" 

我不斷收到的錯誤是

/bin/tar: Removing leading `/' from member names 
/bin/tar: /home/bob /var/www /root: Cannot stat: No such file or directory 
/bin/tar: Exiting with failure status due to previous errors 
/bin/tar -zcvf /backup/daily/calendar/2012-12-13/dirs.tar.gz /home/bob /var/www /root 

如果我在終端上運行的最後一個echo命令，它工作正常。當腳本

Answer 1

嘗試中調用去除雙引號不起作用：

$TAR -zcvf ${BACKUPDIR}/${BFILE} ${DIRS}