[root@test_android_client_download xianlaigames]# lsattr
-------------e- ./jilinmj.apk
[root@test_android_client_download xianlaigames]# cha
chacl chage chainsaw chardetect chattr
[root@test_android_client_download xianlaigames]# chattr +i jilinmj.apk
[root@test_android_client_download xianlaigames]# lsattr
----i--------e- ./jilinmj.apk
[root@test_android_client_download xianlaigames]# rm -f jilinmj.apk
rm: cannot remove `jilinmj.apk': Operation not permitted