Sean Wei says to YSITD

➜ ~ ls -l /usr/sbin/tcpdump -rwxr-xr-x 1 root wheel 851632 Sep 14 08:56 /usr/sbin/tcpdump ➜ ~ sudo chmod u+s /usr/sbin/tcpdump chmod: Unable to change file mode on /usr/sbin/tcpdump: Operation not permitted 求可能原因

at Sat, Jan 7, 2017 8:40 PM