Which of the following commands changes the ownership of file.txt to the user dan and the group staff?
A.
chown dan/staff file.txt
B.
chown dan:staff file.txt
C.
chown -u dan -g staff file.txt
D.
chown dan -g staff file.txt
題解
「chown」指令可以改變檔案的擁有者和群組。選項B是正確用法，將「file.txt」的檔案擁有者改成「dan」，群組改成「staff」。