在Linux操作系统中，（）命令可以将文件备份到磁带上。
- A.cp
- B.tar
- C.dir
- D.tr
正确答案及解析
正确答案
解析
cp为Linux的拷贝命令；
tar最初被用来在磁带上创建档案，随着时间的推移， tar命令逐渐变为一个将很多文件进行存档的工具；
dir为dos命令，用于显示目录；
tr为字符串处理命令。
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