android permissions explained

protected] home]# setfacl--set u::rw,u:tom:rw,g::r,o::-bo/9. Backup and Restore ACLs1. The main file Operations Command CP and MV both support ACLs, but the CP command needs to be prefixed with the-p parameter. However, common backup tools, such as tar, do not preserve ACL information for directories and files[Email protected] data]# Getfacl-r testdir/> Acl.txt[Email protected] data]# Setfacl-r-B testdir/[Email protected] data]# setfacl-r--set-file=acl.txt testdir/[Email protected] data]# Getfa

From left to right, the first digit represents the permissions of the file owner, the second digit represents the permissions of the same group of users, and the third digit represents the permissions of the other user.And the specific permissions are represented by a number, the Read permission equals 4, with R, the p

marvinNew Password:Re-enter new password:Normal user deletes the root file under the additional group directory[[emailprotected] tmp]# pwd/tmp#test 目录组属于zander用户[[emailprotected] tmp]# ll -d testdrwxrwxr-x. 2 root zander 6 Apr 21 15:48 test[[emailprotected] tmp]# cd test/#创建一个root的文件[[emailprotected] test]# touch a[[emailprotected] test]# ll-rw-r--r--. 1 root root 0 Apr 21 15:50 a#切换到marvin用户[[emailprotected] test]$ iduid=1000(marvin) gid=1000(marvin) 组=1000(marvin)[[emailprotected] test]$ echo

Java access is as common as classes and objects, and is ubiquitous in Java programs. Java access, depending on the permission range from large to small: public > Protected > Package > Private.To explain before the explanation: the word "use" here means that the class is instantiated (instantiating an object), accessing the property, and invoking the method.First, the access rights of the Java class are explained. Classes in Java have only two access r

] [+ |-| =] [mode] file name?Action object who is either or their combination of the following letters:U means "user", which is the owner of the file or directory.G means "same group user", that is, all users with the same group ID as the file owner.O means "other (others) users".A means "all users". He is the system default value.+ Add a permission.-Cancels a permission.= gives the given permission and cancels all other permissions, if any.Setting th

DanielCmnD_alias usercmd =/usr/sbin/useradd,/usr/sbin/userdel,/user/bin/passwd [a-za-z]*,/bin/chown,/bin/chmodCmnd_Alias Diskcmd =/sbin/fdisk,/sbin/partedcmnd_alias netcmd =/sbin/ifconfig,/etc/init.d/networkcmnd_alias CTRLCMD =/US R/sbin/reboot,/usr/sbin/haltrunnas_alias OP = root, daniel# #ADMINS all= (All) Usercmd, Netcmd, Ctrlcmdnetadmins All= (OP) nopasswd:netcmduseradmins all= (OP) nopasswd:usercmd #NOPASSWD, indicating that after the input is not required to enter the password, the de

representation of polymorphism between a parent class and a subclass, and overloading overloading is a representation of polymorphism in a class. If you define a method in a subclass that has the same name and arguments as its parent class, we say that the method is overridden (overriding). When an object of a subclass uses this method, the definition in the subclass is called, and for it the definition in the parent class is "masked". If more than one method with the same name is defined in a

: Alertdialog.theme_device_default_lightAlertdialog Commedialog = new Alertdialog.builder (walkietalkieactivity.this,alertdialog.theme_device_default_light )====================================================================================Ouyangpeng welcome reprint, sharing with people is the source of progress!Reprint please keep the original address : Http://blog.csdn.net/ouyang_peng==================================================================================== Copyright NOTICE: This ar

The button is a very frequent component of Android development, primarily a button that is generated on the UI interface that the user can click and the button triggers an onclick Click event when the user clicks the button.First, Button introductionbutton is easy to use, you can specify the Android:background property for the button to increase the background color or background image, if the background image is set to irregular background image, you

", "com.xxx.xxx.LoginActivity");Or use the method settings provided by Java-client:Caps.setcapability (mobilecapabilitytype.app_activity, "com.xxx.xxx.LoginActivity");appwaitactivitySet the Android activity you want to wait for, set it up in the following way:Caps.setcapability ("Appwaitactivity", "Com.android.calculator2.Calculator");OrCaps.setcapability (mobilecapabilitytype.app_wait_activity, "com.android.calculator2.Calculator");AppwaitpackageTo w

Delia Ways to dynamically change controls 1. Declaring a control parameter gets an object Linearlayout.layoutparams linear = (Layoutparams) view.getlayoutparams (); 2. Set the control parameters, such as width: Linear.width = 10; 3. Make the settings effective View.setlayoutparams (linear); Note: The view represents the corresponding control object Posted @ 2012-03-01 11:29 Delia Read (5) Comments (0) Edit Let TextView bring its own scroll bar There is a Ellipsize property in TextView that sho

(); M.settype (iqmsgresult.com_mes); M.setsender (MyAccount); M.setsendernick ( MoreActivity.me.getNick ()); M.setsenderavatar (MoreActivity.me.getAvatar ()); M.setreceiver (Chataccount); M.setcontent (chatcontent); M.setsendtime (Iqtime.getimenos ()); Oos.writeobject (m);//Update chat content Updatechatview (new Messageentity (MoreActivity.me.getAvatar (), Chatcontent, Iqtime.getime (), false));} catch (IOException e) {e.printstacktrace ();}}}); Registered broadcast Intentfilter Myinte

Common permissions for Android, android Permissions 1. ACCES_NETWORK_STATE allows applications to obtain network status information. 2. ACCESS_WIFI_STATE allows applications to obtain the permission for Wi-Fi network status. 3. BATTERY_STATS allows applications to obtain Battery status

parent layout Gravity is where you adjust the layout of the sub-layout Horizontal linearlayout to start from the left to place the layout4.layout_gravity only in the LinearLayout layout Relativelayout:Relative layout, we just need to know the corresponding property on the line:android:layout_alignParentLeft="true"android:layout_alignParentTop="true"android:layout_centerInParent="true"android:layout_centerHorizontal="true"android:layout_centerVertical="true"android:layout_mar

Systemreceiver extends Broadcastreceiver {@Overridepublic void OnReceive (Context context, Intent Intent) {if (Intent.getaction (). Equals (Intent.action_battery_low)) {LOG.E (" Systemreceiver "," low battery indication "); Toast.maketext (Context, "Your phone is low in charge, please recharge it in time", Toast.length_short). Show ();}}The following is the Androidmanifest.xml file: Interface Layout File Main.xmlThe explanation is over, but one thing I don't know for myself is that this system

Common permissions of the Android system and android Permissions Permission Description ACCESS_NETWORK_STATE Allow applications to obtain network status information ACCESS_WIFI_STATE Allow applications to obtain Wi-Fi network status Permissions