Class Notes of DATA 520 Databases (Fall 2025)
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shell> ls -all note.txt

-rwxr-xr-x.  1 wen.chen.hu domain users   181 Jul 12 04:48 note.txt*

 111101101 = 755 = 111 101 101
 rwxrwxrwx         --- --- ---
                    7   5   5

O: Owner permission (you)
G: Group members permission
E: Everyone else permission (including the Web)

shell> chmod 755 note.txt

sqlplus wenchen/database@xe