ϰ 丮 ̶ ణ ٸǷ ϰ ϰڽϴ.
б ִ ϰ, ִ , ִ մϴ.
丮 б 丮 ִ ̰, 丮 , ̵ϰ ϰ ִ 丮 ִ ǹϰ, 丮 Ž ִ ũ⸦ ϰų 丮 ų "cd" ɾ Ͽ ٸ 丮 ̵ ִ մϴ.
ϴ ɾ chmod Դϴ. ɾ ϴ ,
?
happy.cgi Ͽ Ͽ ڴ ְ, ƹ ѵ ʰ, ڿԴ б ַ ؾ ұ?
̷ մϴ.
ex) chmod 706 happy.cgi
н ǥϱ ó ڸ ڵ带 ϴµ, ̰ ϸ մϴ. ó 706 ڸ ڷ ǥõǴµ ⼭
ù ° ( ڸ ) Ÿ,
° ( ڸ ) Ÿ,
° ( ڸ ) ü Ÿ.
, ڴ ϴ.
б = 4
= 2
= 1
ƹ = 0
شǴ ڸ Էϸ ˴ϴ.
, ÿ ʿ ڵ ָ ˴ϴ.
б Ѱ ְ ϸ 4 + 2 6 , б Ѱ ְ ϸ 4 + 1 5 ָ ȴ. ְ Ѵٸ 4 + 2 + 1 7 ָ ˴ϴ.
ǽ ls -l Ǿ ִ ˾ƺô.
-rwxr-xr-x 1 root root 27978 7 13 00:18 happy.cgi
rwx ־ Ƿ 4 + 2 + 1 = 7
r-x ̹Ƿ бѰ 4 + 1 = 5
ü ѵ r-x ̹Ƿ 4 + 1 = 5 ̴.
Ƿ happy.cgi 755 ˴ϴ.
ϳ ˾ƺ?
-rw-r--r-- 1 root root 27978 7 13 00:18 happymall.cgi
Ͽ Ǿ ִ ɱ?
rw̹Ƿ 4 + 2 = 6
ü r̹Ƿ 4̴.
Ƿ happymall.cgi 644 ̴.
happymall.cgi ڴ ְ, б ְ, ڿԴ б Ѹ ַ ؾ ұ?
ѹ غñ ٶϴ.