adb shell

lumeng:/cache # ls -l
total 59080
-rw-rw-rw- 1 root root 30246444 2017-11-20 17:41 update.zip
lumeng:/cache # chown system update.zip                                    
lumeng:/cache # ls -l
total 59080
-rw-rw-rw- 1 system root 30246444 2017-11-20 17:41 update.zip
lumeng:/cache # chgrp  system update.zip                                   
lumeng:/cache # ls -l
total 59080
-rw-rw-rw- 1 system system 30246444 2017-11-20 17:41 update.zip
lumeng:/cache # chmod 777 update.zip                                       
lumeng:/cache # ls -l
total 59080
-rwxrwxrwx 1 system system 30246444 2017-11-20 17:41 update.zip
lumeng:/cache #