单选题Which of the following commands makes /bin/foo executable by everyone but writable only by its owner？（）A chmod 557 /bin/fooB chmod o+rwx.a+rx/bin/fooC chown 557 /bin/fooD chmod 755/bin/foo
单选题
Which of the following commands makes /bin/foo executable by everyone but writable only by its owner？（）
A
chmod 557 /bin/foo
B
chmod o+rwx.a+rx/bin/foo
C
chown 557 /bin/foo
D
chmod 755/bin/foo
参考解析
解析：
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