下面哪条命令可用来确保文件“file1”存在()A、cp file1/dev/nullB、touch file1C、create file1D、mkfile file1
下面哪条命令可用来确保文件“file1”存在()
- A、cp file1/dev/null
- B、touch file1
- C、create file1
- D、mkfile file1
相关考题:
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