The [Android Debug Bridge](https://developer.android.com/studio/command-line/adb.html) (ADB) is a toolkit included in the Android SDK package, it is not only a powerful tool for Android developers and testers, but also a good toy for Android fans.
This repository renews continually, Pull Requests and Issues are welcomed. If you found [this](https://github.com/mzlogin/awesome-adb) is useful, you can star it and conveniently back here to view when necessary.
| `-s <SerialNumber>` | Specifies the device number corresponding serialNumber / simulator command target |
In the case of multiple devices / simulators are connected to the more common `-s <serialNumber>` parameters, serialNumber can be obtained through `adb devices` command. Such as:
```sh
$ adb devices
List of devices attached
cf264b8f device
emulator-5554 device
```
Output in the `cf264b8f` and` emulator-5554` is serialNumber. For example, this time I want to specify `cf264b8f` this equipment to run the adb command to take a screen resolution:
```sh
adb -s cf264b8f shell wm size
```
Encountered multiple devices / simulators use the case of these parameters for the command to specify the target device, hereinafter to simplify the description will not be repeated.
### Start/Stop
Start adb server command:
```sh
adb start-server
```
(Generally no need to manually execute this command, when you run the command adb adb server if found does not start automatically from the transfer.)
The operating principle is adb adb server daemon and the phone side PC side adbd establish a connection, then the PC side adb client via adb server forward command parsing after running adbd receive commands.
So if adbd ordinary rights to perform some require root privileges to execute the command can not be directly used `adb xxx` execution. Then you can then execute the command `adb shell` after` su`, but also allows adbd root privileges to perform this high privilege can execute arbitrary commands.
command:
```sh
adb root
```
Normal output:
```sh
restarting adbd as root
```
Now run `adb shell`, take a look at the command line prompt is not turned into a` `#?
After some phone root can not let adbd by `adb root` execute commands with root privileges, some models such as Samsung, will be prompted to` adbd can not run as root in production builds`, then you can install adbd Insecure, then `adb root` try.
Accordingly, if you want to restore adbd non-root privileges, you can use `adb unroot` command.
### Designated adb server network port
command:
```sh
adb -P <port> start-server
```
The default port is 5037.
## Device connection management
### Inquiries connected device / simulator
command:
```sh
adb devices
```
Example output:
```sh
List of devices attached
cf264b8f device
emulator-5554 device
```
Output format is `[serialNumber] [state]`, serialNumber that is, we often say that the SN, state the following categories:
*`Offline` - indicates that the device is not connected to the success or unresponsive.
*`Device` - device is connected. Note that this state does not identify the Android system has been fully activated and operational in the device during startup device instance can be connected to the adb, but after boot the system before it becomes operational.
*`No device` - no device / emulator connection.
The output shows the current connected the two devices / simulators, `cf264b8f` and` emulator-5554` are they SN. As can be seen from the `emulator-5554` name it is an Android emulator.
Common alarm output:
1. No device / emulator connection is successful.
```sh
List of devices attached
```
2. The device / emulator is not connected to adb or unresponsive.
```sh
List of devices attached
cf264b8f offline
```
### USB connection
USB connection normal use adb by the need to ensure that:
1. Hardware status is normal.
Including Android devices in the normal power state, USB cable and interface intact.
Developer Options 2. Android devices and USB debugging mode is on.
You can go to the "Settings" - "Developer options" - "Android Debug" view.
If you can not find the developer options in the settings, it needs to make it through an egg is displayed: In the "Settings" - "About phone" continuous click "version number" 7 times.
3. The device driver is normal.
It seems to worry about the Linux and Mac OS X, the Windows likely to be encountered in the case of the need to install drivers, this can be confirmed right "Computer" - "Properties", the "Device Manager" in view on related equipment Is there a yellow exclamation point or question mark, if not explain the driving state has been good. Otherwise, you can download a mobile assistant class program to install the driver first.
4. Status after confirmation via USB cable connected computers and devices.
```sh
adb devices
```
If you can see
```sh
xxxxxx device
```
Description Connection successful.
### Wireless connection (need to use the USB cable)
In addition to the USB connection to the computer to use adb, can also be a wireless connection - although the connection process is also step using USB needs, but after a successful connection to your device can get rid of the limit of the USB cable within a certain range it !
Steps:
1. Connect Android device to run adb computer connected to the same local area network, such as connected to the same WiFi.
2. The device connected to the computer via a USB cable.
Make sure the connection is successful (you can run `adb devices` see if you can list the device).
3. Allow the device listens on port 5555 TCP / IP connections:
Generally the 'Settings' in - "About phone" - "state information" - "IP address" is found, you can also use the following in the [View device information - IP address][1] a Lane method adb command.
Here `<device-ip-address>` is the IP address of the device found in the previous step.
7. Confirm the connection status.
```sh
adb devices
```
If you can see
```sh
<device-ip-address>:5555 device
```
Description Connection successful.
If you can not connect, verify that Android devices and the computer is connected to the same WiFi, then execute `adb connect <device-ip-address>` that step again;
If that does not work, by `adb kill-server` restart the adb and then try it all over again.
On a "wireless connection (need to use USB cable)" method is described in official documents, need the help of a USB cable to enable the wireless connection.
Since we want to achieve a wireless connection, it can all step down are wireless it? The answer is energy.
1. Install a terminal emulator on the Android device.
Equipment already installed you can skip this step. Terminal emulator download address I use is: [Terminal Emulator for Android Downloads](https://jackpal.github.io/Android-Terminal-Emulator/)
Generally the 'Settings' in - "About phone" - "state information" - "IP address" is found, you can also use the following in the [View device information - IP address][1] a Lane method adb command.
That is the basis of `adb shell pm list packages` can add some parameters on the filter to view different lists, supports filtering parameters are as follows:
For example, to view a list of package names that contain the string `mazhuang` applications, order:
```sh
adb shell pm list packages mazhuang
```
Of course, you can also use grep to filter:
```sh
adb shell pm list packages | grep mazhuang
```
### Install APK
Format:
```sh
adb install [-lrtsdg] <path_to_apk>
```
parameter:
`Adb install` may be followed by some optional parameters to control the behavior of the installation APK, available parameters and their meanings are as follows:
| INSTALL\_FAILED\_INVALID\_URI | invalid filename APK | APK file names to ensure no Chinese |
| INSTALL\_FAILED\_INSUFFICIENT\_STORAGE | lack of space | cleanup space |
| INSTALL\_FAILED\_DUPLICATE\_PACKAGE | program of the same name already exists | |
| INSTALL\_FAILED\_NO\_SHARED\_USER | shared user requested does not exist | |
| INSTALL\_FAILED\_UPDATE\_INCOMPATIBLE | already installed signature is not the same application with the same name, and the data is not removed | |
| INSTALL\_FAILED\_SHARED\_USER\_INCOMPATIBLE | shared user request exists but the signatures do not match | |
| INSTALL\_FAILED\_MISSING\_SHARED\_LIBRARY | installation package used on the device unusable shared library | |
| INSTALL\_FAILED\_REPLACE\_COULDNT\_DELETE | can not be deleted when replacing | |
| INSTALL\_FAILED\_DEXOPT | dex optimization validation failure or lack of space | |
| INSTALL\_FAILED\_OLDER\_SDK | equipment system version is lower than the application requirements | |
| INSTALL\_FAILED\_CONFLICTING\_PROVIDER | equipment already exists with the same name in application content provider | |
| INSTALL\_FAILED\_NEWER\_SDK | equipment system version higher than the application requirements | |
| INSTALL\_FAILED\_TEST\_ONLY | test-only applications, but when you install `-t` parameter is not specified | |
| INSTALL\_FAILED\_CPU\_ABI\_INCOMPATIBLE | contains incompatible device CPU Application Binary Interface for native code | |
| INSTALL\_FAILED\_MISSING\_FEATURE | application uses device features that are unavailable | |
| INSTALL\_FAILED\_CONTAINER\_ERROR | sdcard access failure | confirm sdcard is available, or to install built-in storage |
| INSTALL\_FAILED\_INVALID\_INSTALL\_LOCATION | can not be installed to the specified location | switch mounting position, add or delete `-s` parameters |
| INSTALL\_FAILED\_MEDIA\_UNAVAILABLE | installation location is unavailable | generally sdcard, confirm sdcard is available or to install built-in storage |
| INSTALL\_FAILED\_VERIFICATION\_FAILURE | verify the installation package fails | |
| INSTALL\_FAILED\_PACKAGE\_CHANGED | calling application program expects inconsistent | |
| INSTALL\_FAILED\_UID\_CHANGED | previously installed the app, and this assignment UID inconsistent | remove residual files previously installed |
| INSTALL\_FAILED\_VERSION\_DOWNGRADE | already installed the application later | use `-d` parameters |
| INSTALL\_FAILED\_PERMISSION\_MODEL\_DOWNGRADE | installed target SDK runtime support for application permissions of the same name, to install the runtime version does not support permission | |
| INSTALL\_PARSE\_FAILED\_NOT\_APK | specified path is not a file or not to `.apk` end | |
| INSTALL\_PARSE\_FAILED\_UNEXPECTED\_EXCEPTION | parser encounters an exception | |
| INSTALL\_PARSE\_FAILED\_NO\_CERTIFICATES | installation package is not signed | |
| INSTALL\_PARSE\_FAILED\_INCONSISTENT\_CERTIFICATES | already installed the app, and signed with the APK files are inconsistent | first uninstall the application on the device, then install |
| INSTALL\_PARSE\_FAILED\_MANIFEST\_EMPTY | in the manifest file can not be found to find operable label (instrumentation or application) | |
| INSTALL\_FAILED\_INTERNAL\_ERROR | installation fails because of system problems | |
| INSTALL\_FAILED\_USER\_RESTRICTED | Users are limited to installing applications | |
| INSTALL\_FAILED\_DUPLICATE\_PERMISSION | application attempts to define an existing permission name | |
| INSTALL\_FAILED\_NO\_MATCHING\_ABIS | applications include device application binary interface does not support the native code | |
| INSTALL\_CANCELED\_BY\_USER | applications installed on the device needs confirmation, but not operate the device or the point of cancellation | agree to install on the device |
| INSTALL\_FAILED\_ACWF\_INCOMPATIBLE | applications are not compatible with the device | |
| Does not contain AndroidManifest.xml | invalid APK file | |
| Is not a valid zip file | invalid APK file | |
| Offline | device is not connected successfully | first device with adb successful connection |
3. Delete the corresponding apk file / data / local / tmp under.
Therefore, when necessary, according to this step, manually step through the installation process.
### Uninstalling
command:
```sh
adb uninstall [-k] <packagename>
```
`<Packagename>` represents the application package name, `-k` optional parameter indicates uninstall the application but keep the data and cache directories.
Command Example:
```sh
adb uninstall com.qihoo360.mobilesafe
```
Uninstall represents 360 mobile guards.
### Clear app cache data
command:
```sh
adb shell pm clear <packagename>
```
`<Packagename>` represents the name of the application package, the effect of this command is equivalent to the application information in the settings screen, click the "Clear Cache" and "Clear data."
`<packagename>` parameter is optional, command with `<packagename>` will output services related with that packagename, and command without `<packagename>` will output all services.
Complete packagename is unnecessary. For example, `adb shell dumpsys activity services org.mazhuang` will output services related with `org.mazhuang.demo1`, `org.mazhuang.demo2` and `org.mazhuang123`, etc.
| `-n <COMPONENT>` | specify the full component name, which is used to explicitly specify the start Activity, such as `com.example.app / .ExampleActivity` |
`<INTENT>` can bring in data, like Bundle write code like:
adb shell am start -n com.tencent.mm/.ui.LauncherUI
```
It represents transfer from the micro-channel main interface.
```sh
adb shell am start -n org.mazhuang.boottimemeasure/.MainActivity --es "toast" "hello, world"
```
Expressed from the transfer `org.mazhuang.boottimemeasure / .MainActivity` key data string and pass it to` toast - hello, world`.
### Transferred from the Service
Format:
```sh
adb shell am startservice [options] <INTENT>
```
E.g:
```sh
adb shell am startservice -n com.tencent.mm/.plugin.accountsync.model.AccountAuthenticatorService
```
Service represents a transfer from micro-letter.
### Transmits broadcast
Format:
```sh
adb shell am broadcast [options] <INTENT>
```
All components can be broadcast to be broadcast only to the specified component.
For example, all of the components to broadcast `BOOT_COMPLETED`:
```sh
adb shell am broadcast -a android.intent.action.BOOT_COMPLETED
```
As another example, only to `org.mazhuang.boottimemeasure / .BootCompletedReceiver` broadcast` BOOT_COMPLETED`:
```sh
adb shell am broadcast -a android.intent.action.BOOT_COMPLETED -n org.mazhuang.boottimemeasure/.BootCompletedReceiver
```
Such usage is very practical in the test, such as a broadcast scenes difficult to manufacture, can be considered to transmit broadcast in this way.
Both predefined broadcast transmission system can also send a custom broadcast. The following is part of the normal pre-defined radio and Trigger timing:
Stop all processes and services represents 360 security guards.
## File Management
### Copy files to the computer equipment in
command:
```sh
adb pull <filepathondevice> [directory on the computer]
```
The parameters on which the directory `` computer can be omitted, it defaults to the current directory.
example:
```sh
adb pull /sdcard/sr.mp4 ~/tmp/
```
* Tips: * file path on the device may need root privileges to access, if your equipment has been root, you can use the `adb shell` and` su` command to obtain root privileges adb shell Lane after the first `cp / path / on / device / sdcard / filename` copy files to sdcard, then `adb pull / sdcard / filename / path / on / pc`.
* Tips: * file on the path of ordinary privileges may not be directly written to the device if you have root too, can be `adb push / path / on / pc / sdcard / filename`, and then` `adb shell` after su` obtain root privileges adb shell inside, `cp / sdcard / filename / path / on / device`.
## Analog Keys / inputs
In `adb shell` there is a very useful command called` input`, through which you can do some interesting things.
`Complete help information input` command is as follows:
Such as using `adb shell input keyevent <keycode>` command, different keycode to achieve different functions, keycode complete list see [KeyEvent](https://developer.android.com/reference/android/view/KeyEvent.html), I think the interesting part of the quote is as follows:
Here are some examples of the use of `input` command.
### Power button
command:
```sh
adb shell input keyevent 26
```
Executive effect equivalent to pressing the power button.
### menu
command:
```sh
adb shell input keyevent 82
```
### HOME key
command:
```sh
adb shell input keyevent 3
```
### return key
command:
```sh
adb shell input keyevent 4
```
### volume control
Increase the volume:
```sh
adb shell input keyevent 24
```
lower the volume:
```sh
adb shell input keyevent 25
```
Mute:
```sh
adb shell input keyevent 164
```
### Media Control
play / Pause:
```sh
adb shell input keyevent 85
```
Stop play:
```sh
adb shell input keyevent 86
```
Play the next song:
```sh
adb shell input keyevent 87
```
Played on one:
```sh
adb shell input keyevent 88
```
Resume playback:
```sh
adb shell input keyevent 126
```
Pause playback:
```sh
adb shell input keyevent 127
```
### On / Off screen
It can be switched on and off by telling off the screen above the analog power button, but if you want to light up or clear off the screen, then you can use the following method.
Light up the screen:
```sh
adb shell input keyevent 224
```
Off screen:
```sh
adb shell input keyevent 223
```
### Slide to unlock
If no password lock screen is unlocked by sliding gestures, so you can `input swipe` to unlock.
Command (parameter models Nexus 5, swipe up to unlock, for example):
`3001000300 parameters represent` 500` starting x coordinate of the start point y coordinate of the end point x coordinate y coordinate of the end point '.
Press a grade level and above filter log is the log output.
For example, the command:
```sh
adb logcat *:W
```
Will Warning, Error, Fatal and Silent log output.
#### Filter by tag and log level
For example, the command:
```sh
adb logcat ActivityManager:I MyApp:D *:S
```
Represents an output tag `ActivityManager` above the level of Info logs, Debug log output above the level of the tag` MyApp`, and other tag Silent level of log (ie, shield other tag logging).
#### Log format
You can use `adb logcat -v <format>` option specifies log output format.
Log supported by the following `<format>`:
* brief
The default format. The format is:
```sh
<priority>/<tag>(<pid>): <message>
```
Example:
```sh
D/HeadsetStateMachine( 1785): Disconnected process message: 10, size: 0
```
* process
The format is:
```sh
<priority>(<pid>) <message>
```
Example:
```sh
D( 1785) Disconnected process message: 10, size: 0 (HeadsetStateMachine)
```
* tag
The format is:
```sh
<priority>/<tag>: <message>
```
Example:
```sh
D/HeadsetStateMachine: Disconnected process message: 10, size: 0
In brackets `[14201.684016]` time represents the core begins to start in seconds.
By kernel log, we can do some things, such as a measure of the kernel boot time, `Freeing init memory` find that time is in front of the line after system startup, the kernel log.
Where `mDisplayId` to display numbers,` init` initial resolution and screen density, `app` height than` init` in the smaller, bottom of the screen indicates the virtual keys and a height of 1920 - 1794 = 126px co 42dp .
### android\_id
command:
```sh
adb shell settings get secure android_id
```
Example output:
```sh
51b6be48bac8c569
```
### IMEI
In Android 4.4 and below versions are available through the following command IMEI:
```sh
adbshelldumpsysiphonesubinfo
```
Example output:
```sh
Phone Subscriber Info:
Phone Type = GSM
Device ID = 860955027785041
```
`Device ID` which is IMEI.
In Android 5.0 and above in the command output is empty, was acquired by other means (requires root privileges):
Reference: [adb shell dumpsys iphonesubinfo not working since Android 5.0 Lollipop](http://stackoverflow.com/questions/27002663/adb-shell-dumpsys-iphonesubinfo-not-working-since-android-5-0-lollipop)
Every time you want to know the IP address of the device had the "Setting" - "About phone" - "state information" - "IP address" annoying, right? You can easily see via adb.
command:
```sh
adb shell ifconfig | grep Mask
```
Example output:
```sh
inet addr:10.130.245.230 Mask:255.255.255.252
inet addr:127.0.0.1 Mask:255.0.0.0
```
So it is `10.130.245.230` device IP address.
On some devices this command no output, if the device is attached to WiFi, you can use the following command to view the LAN IP:
```sh
adb shell ifconfig wlan0
```
Example output:
```sh
wlan0: ip 10.129.160.99 mask 255.255.240.0 flags [up broadcast running multicast]
If the above command still can not get the desired information, then you can try the following command (part of the system version is available):
```sh
adb shell netcfg
```
Example output:
```sh
wlan0 UP 10.129.160.99/20 0x00001043 f8:a9:d0:17:42:4d
lo UP 127.0.0.1/8 0x00000049 00:00:00:00:00:00
p2p0 UP 0.0.0.0/0 0x00001003 fa:a9:d0:17:42:4d
sit0 DOWN 0.0.0.0/0 0x00000080 00:00:00:00:00:00
rmnet0 DOWN 0.0.0.0/0 0x00000000 00:00:00:00:00:00
rmnet1 DOWN 0.0.0.0/0 0x00000000 00:00:00:00:00:00
rmnet3 DOWN 0.0.0.0/0 0x00000000 00:00:00:00:00:00
rmnet2 DOWN 0.0.0.0/0 0x00000000 00:00:00:00:00:00
rmnet4 DOWN 0.0.0.0/0 0x00000000 00:00:00:00:00:00
rmnet6 DOWN 0.0.0.0/0 0x00000000 00:00:00:00:00:00
rmnet5 DOWN 0.0.0.0/0 0x00000000 00:00:00:00:00:00
rmnet7 DOWN 0.0.0.0/0 0x00000000 00:00:00:00:00:00
rev_rmnet3 DOWN 0.0.0.0/0 0x00001002 4e:b7:e4:2e:17:58
rev_rmnet2 DOWN 0.0.0.0/0 0x00001002 4e:f0:c8:bf:7a:cf
rev_rmnet4 DOWN 0.0.0.0/0 0x00001002 a6:c0:3b:6b:c4:1f
rev_rmnet6 DOWN 0.0.0.0/0 0x00001002 66:bb:5d:64:2e:e9
rev_rmnet5 DOWN 0.0.0.0/0 0x00001002 0e:1b:eb:b9:23:a0
rev_rmnet7 DOWN 0.0.0.0/0 0x00001002 7a:d9:f6:81:40:5a
rev_rmnet8 DOWN 0.0.0.0/0 0x00001002 4e:e2:a9:bb:d0:1b
rev_rmnet0 DOWN 0.0.0.0/0 0x00001002 fe:65:d0:ca:82:a9
rev_rmnet1 DOWN 0.0.0.0/0 0x00001002 da:d8:e8:4f:2e:fe
```
You can see the network connection name, enabled, IP address and Mac address and other information.
### Mac Address
command:
```sh
adb shell cat /sys/class/net/wlan0/address
```
Example output:
```sh
f8:a9:d0:17:42:4d
```
This view is LAN Mac address, or other information connected to the mobile network can `adb shell netcfg` command" IP address "mentioned in the previous section to see through.
### CPU Information
command:
```sh
adb shell cat /proc/cpuinfo
```
Example output:
```sh
Processor : ARMv7 Processor rev 0 (v7l)
processor : 0
BogoMIPS : 38.40
processor : 1
BogoMIPS : 38.40
processor : 2
BogoMIPS : 38.40
processor : 3
BogoMIPS : 38.40
Features : swp half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt
This is the CPU information Nexus 5, we can see from the output hardware used is `Qualcomm MSM 8974`, processor number is 0-3, so it is a quad-core, the use of architecture is` ARMv7 Processor rev 0 ( v71) `.
### Memory Information
command:
```sh
adb shell cat /proc/meminfo
```
Example output:
```sh
MemTotal: 1027424 kB
MemFree: 486564 kB
Buffers: 15224 kB
Cached: 72464 kB
SwapCached: 24152 kB
Active: 110572 kB
Inactive: 259060 kB
Active(anon): 79176 kB
Inactive(anon): 207736 kB
Active(file): 31396 kB
Inactive(file): 51324 kB
Unevictable: 3948 kB
Mlocked: 0 kB
HighTotal: 409600 kB
HighFree: 132612 kB
LowTotal: 617824 kB
LowFree: 353952 kB
SwapTotal: 262140 kB
SwapFree: 207572 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 265324 kB
Mapped: 47072 kB
Shmem: 1020 kB
Slab: 57372 kB
SReclaimable: 7692 kB
SUnreclaim: 49680 kB
KernelStack: 4512 kB
PageTables: 5912 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 775852 kB
Committed_AS: 13520632 kB
VmallocTotal: 385024 kB
VmallocUsed: 61004 kB
VmallocChunk: 209668 kB
```
Wherein, `MemTotal` is the total memory device,` MemFree` is currently free memory.
### More hardware and system properties
More hardware devices and system properties can be obtained by the following command:
```sh
adb shell cat /system/build.prop
```
This will output a lot of information, including the previously mentioned several sections of "model" and "version of Android," and so on.
In output also includes some other useful information, they can also be `adb shell getprop <attribute name>` command alone, part of the property include the following:
Settings in this section correspond with "Expanded desktop" in Cyanogenmod.
command:
```sh
adb shell settings put global policy_control <key-values>
```
`<key-values>` composite by keys and their values below, format is `<key1>=<value1>:<key2>=<value2>`.
| key | meaning |
|-----------------------|---------------------|
| immersive.full | Hide both |
| immersive.status | Hide status bar |
| immersive.navigation | Hide navigation bar |
| immersive.preconfirms | ? |
Values for these keys are comma-delimited list of tokens, where tokens:
| value | 含义 |
|----------------|------------------|
| `apps` | All applications |
| `*` | Everywhere |
| `packagename` | Include package |
| `-packagename` | Exclude package |
For example:
```sh
adb shell settings put global policy_control immersive.full=*
```
Means set hide both status bar and navigation bar everywhere.
```sh
adb shell settings put global policy_control immersive.status=com.package1,com.package2:immersive.navigation=apps,-com.package3
```
Means set hide status bar in applications whoes package name is `com.package1` or `com.package2`, hide navigation bar in all applications, exclude whoes package name is `com.package3`.
| -d Display-id | screenshots display the specified number (multiple screen display case next) |
Found If you specify a file name can be omitted when the -p parameter to `.png` ending; otherwise you need to use the -p parameter. If you do not specify a file name, file contents screenshot will be directly output to stdout.
Save screenshot file to computer with a single line command:
```sh
adb shell screencap -p | sed "s/\r$//" > sc.png
```
This depends on `sed` command, it's avaliable in Linux and Mac OS X by default. In Windows, you may find it in bin directory in Git installation place. Otherwise, you may need to download [sed for Windows](http://gnuwin32.sourceforge.net/packages/sed.htm) and add the directory where sed.exe is to PATH environment variable.
/system partitions are mounted read-only, but some operating systems such as Android to add commands to remove the need to bring their own application / system write operation, it is necessary to remount it read-write.
step:
1. Enter the shell and switch to the root user privileges.
mount -o remount,rw -t yaffs2 /dev/block/platform/msm_sdcc.1/by-name/system /system
```
Here `/ dev / block / platform / msm_sdcc.1 / by-name / system` is we get the file path from the output in the previous step.
If the output is not an error, then the operation is successful, you can file / system under wanted.
### Check connection over WiFi password
**Note: You need root privileges.**
command:
```sh
adb shell
su
cat /data/misc/wifi/*.conf
```
Example output:
```sh
network={
ssid="TP-LINK_9DFC"
scan_ssid=1
psk="123456789"
key_mgmt=WPA-PSK
group=CCMP TKIP
auth_alg=OPEN
sim_num=1
priority=13893
}
network={
ssid="TP-LINK_F11E"
psk="987654321"
key_mgmt=WPA-PSK
sim_num=1
priority=17293
}
```
`Ssid` we shall see in the WLAN settings in the name,` psk` the password, `key_mgmt` security encryption.
### To set the system date and time
** Note: You need root privileges. **
command:
```sh
adb shell
su
date -s 20160823.131500
```
It said it would change the system date and time at 13:15:00 on August 23, 2016.
### restart cellphone
command:
```sh
adb reboot
```
### Detect whether the device is root
command:
```sh
adb shell
su
```
In this case the command line prompt is `` $ indicates no root privileges, is `` the # indicates root.
### Monkey use stress testing
Monkey can generate pseudo-random event to simulate a user click, touch, gesture and other operations, you can program being developed random stress test.
Usage is simple:
```sh
adb shell monkey -p <packagename> -v 500
```
He told `<packagename>` specific application to send 500 pseudo-random events.
Sometimes the need to control the device WiFi mode, you can use the following command to complete.
Open WiFi:
```sh
adb root
adb shell svc wifi enable
```
Close WiFi:
```sh
adb root
adb shell svc wifi disable
```
If successfully implemented, the output is empty; if not get root privileges to execute this command will fail, output `Killed`.
## Brush related commands
### Restart to Recovery mode
command:
```sh
adb reboot recovery
```
### To restart from the Recovery Android
command:
```sh
adb reboot
```
### Restart to Fastboot mode
command:
```sh
adb reboot bootloader
```
### Through sideload system update
If we downloaded the Android system update package corresponds to the device to your computer, you can also adb to complete the update.
Case in Recovery Mode Update:
1. Restart to Recovery mode.
command:
```sh
adb reboot recovery
```
2. Recovery operations on the interface device into the `Apply update`-`Apply from ADB`.
Note: Different Recovery menu may differ from this, there is some level menu `Apply update from ADB`.
3. adb upload and update the system.
command:
```sh
adb sideload <path-to-update.zip>
```
## More adb shell command
Android system is based on Linux kernel, so Linux where many commands in Android also has the same or similar implement, in `adb shell` where you can call. Part earlier in this document have been used in the `adb shell` command.
### See process
command:
```sh
adb shell ps
```
Example output:
```sh
USER PID PPID VSIZE RSS WCHAN PC NAME
root 1 0 8904 788 ffffffff 00000000 S /init
root 2 0 0 0 ffffffff 00000000 S kthreadd
...
u0_a71 7779 5926 1538748 48896 ffffffff 00000000 S com.sohu.inputmethod.sogou:classic
u0_a58 7963 5926 1561916 59568 ffffffff 00000000 S org.mazhuang.boottimemeasure
