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Linux-Permission
1.
Linux/Unix
- 2010, Spring
2.
•
(Owner) • (Group) • (Other)
3.
Linux littleq@ubuntu:~$ ls -l
drwxr-xr-x 3 littleq littleq 4096 2010-02-01 01:00 ~ drwx------ 2 littleq littleq 4096 2010-02-04 11:53 amsn_received drwxr-xr-x 3 littleq littleq 4096 2010-02-21 17:33 Downloads drwxr-xr-x 9 root root 4096 2010-02-20 23:24 judge drwx------ 2 littleq littleq 4096 2010-01-25 17:22 mail drwxr-xr-x 8 littleq littleq 4096 2010-02-18 16:28 OnlineJudge drwxr-xr-x 4 littleq littleq 4096 2010-03-08 16:47 program drwxr-xr-x 7 littleq littleq 4096 2010-03-08 22:42 public_html drwxr-xr-x 3 math11 mathlab 4096 2010-02-21 17:33 Downloads
4.
Read
Write eXecute R W X 4 2 1
5.
Linux 4
2 1 4 x 1 4 x 1 d r w x r - x r - x 7 5 5
6.
• chmod:
SUID... • chown: • chgrp:
7.
chmod- • chmod
775 < > rwxrwxr-x 4 2 1 4 2 1 4 0 1 7 7 5 • chmod a+w,g+w < > u + W g - R o = X a
8.
chown- • chown
[-R] < >[: ] < > • chown -R monkey:mathlab banana • chown littleq aicp0529
9.
chgrp- • chgrp
< > < > • chgrp mathlab yellowfish
10.
•
• ASCII binary • data • • • block character