• 2021-04-14
    【单选题】Create a new file "new.txt" that is a concatenation of "file1.txt" and "file2.txt".
    A. cat file1.txt  file2.txt > new.txt B. cat file1.txt  file2.txt = new.txt C. make new.txt=file1.txt+file2.txt D. cp file1.txt | head file2.txt > new.txt