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Fix typos and accessibility #847 (#1460)

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2
README_CN.md
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@ -30,7 +30,7 @@ English version goes [here](README.md).
### [在线教程(推荐)](https://arthas.aliyun.com/doc/arthas-tutorials.html?language=cn)
* [Usages](tutorials/katacoda/README_CN.md#在线教程使用方法)
* [使用方法](tutorials/katacoda/README_CN.md#在线教程使用方法)
### 快速开始

6
tutorials/katacoda/arthas-advanced-cn/case-classloader.md
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@ -88,7 +88,7 @@ $ classloader -t
比如上面查看到的spring LaunchedURLClassLoader的 hashcode是`1be6f5c3`，可以通过`-c`或者`--classLoaderClass`参数来列出它的所有urls：
`classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader`
`classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader`{{execute T2}}
```
$ classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader
@ -100,7 +100,7 @@ jar:file:/home/scrapbook/tutorial/demo-arthas-spring-boot.jar!/BOOT-INF/lib/spri
### 加载指定ClassLoader里的资源文件
查找指定的资源文件： `classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader -r logback-spring.xml`
查找指定的资源文件： `classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader -r logback-spring.xml`{{execute T2}}
```
$ classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader -r logback-spring.xml
@ -111,7 +111,7 @@ $ classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClas
比如用上面的spring LaunchedURLClassLoader 尝试加载 `java.lang.String` ：
`classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader --load java.lang.String`
`classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader --load java.lang.String`{{execute T2}}
```
$ classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader --load java.lang.String

6
tutorials/katacoda/arthas-advanced-en/case-classloader.md
View File

@ -89,7 +89,7 @@ Note: Please replace `<classLoaderHash>` with your classLoaderHash above, then e
For example, the hashcode of spring `LaunchedURLClassLoader` viewed above is `1be6f5c3`, and all its urls can be listed by the `-c` parameter:
`classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader`
`classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader`{{execute T2}}
```
$ classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader
@ -101,7 +101,7 @@ jar:file:/home/scrapbook/tutorial/demo-arthas-spring-boot.jar!/BOOT-INF/lib/spri
### Load the resource file in the specified ClassLoader
Load the specified resource file: `classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader -r logback-spring.xml`
Load the specified resource file: `classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader -r logback-spring.xml`{{execute T2}}
```
$ classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader -r logback-spring.xml
@ -112,7 +112,7 @@ $ classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClas
For example, try loading `java.lang.String` with spring LaunchedURLClassLoader :
`classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader --load java.lang.String`
`classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader --load java.lang.String`{{execute T2}}
```
$ classloader --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader --load java.lang.String

14
tutorials/katacoda/case-classloader-cn/start-demo.md Normal file
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@ -0,0 +1,14 @@
下载`demo-arthas-spring-boot.jar`，再用`java -jar`命令启动：
`wget https://github.com/hengyunabc/spring-boot-inside/raw/master/demo-arthas-spring-boot/demo-arthas-spring-boot.jar
java -jar demo-arthas-spring-boot.jar`{{execute T1}}
`demo-arthas-spring-boot`是一个很简单的spring boot应用，源代码：[查看](https://github.com/hengyunabc/spring-boot-inside/tree/master/demo-arthas-spring-boot)
启动之后，可以访问80端口： https://[[HOST_SUBDOMAIN]]-80-[[KATACODA_HOST]].environments.katacoda.com
![Demo Web](/arthas/scenarios/common-resources/assets/demo-web.png)

4
tutorials/katacoda/command-help-en/index.json
View File

@ -1,6 +1,6 @@
{
"title": "Arthas Basics",
"description": "Arthas Basics",
"title": "Arthas Help Command",
"description": "Arthas Help Command",
"details": {
"steps": [
{

163
tutorials/katacoda/command-logger-cn/logger.md
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@ -9,29 +9,21 @@
```bash
[arthas@2062]$ logger
name ROOT
class ch.qos.logback.classic.Logger
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
level INFO
effectiveLevel INFO
additivity true
codeSource file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
appenders name CONSOLE
class ch.qos.logback.core.ConsoleAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
target System.out
name APPLICATION
class ch.qos.logback.core.rolling.RollingFileAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
file app.log
name ASYNC
class ch.qos.logback.classic.AsyncAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
appenderRef [APPLICATION]
name ROOT
class ch.qos.logback.classic.Logger
classLoader org.springframework.boot.loader.LaunchedURLClassLoader@5674cd4d
classLoaderHash 5674cd4d
level INFO
effectiveLevel INFO
additivity true
codeSource jar:file:/home/scrapbook/tutorial/demo-arthas-spring-boot.jar!/BOOT-INF/lib/logback-classi
c-1.1.11.jar!/
appenders name CONSOLE
class ch.qos.logback.core.ConsoleAppender
classLoader org.springframework.boot.loader.LaunchedURLClassLoader@5674cd4d
classLoaderHash 5674cd4d
target System.out
...
```
@ -41,17 +33,18 @@
```bash
[arthas@2062]$ logger -n org.springframework.web
name org.springframework.web
class ch.qos.logback.classic.Logger
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
level null
effectiveLevel INFO
additivity true
codeSource file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
name org.springframework.web
class ch.qos.logback.classic.Logger
classLoader org.springframework.boot.loader.LaunchedURLClassLoader@5674cd4d
classLoaderHash 5674cd4d
level null
effectiveLevel INFO
additivity true
codeSource jar:file:/home/scrapbook/tutorial/demo-arthas-spring-boot.jar!/BOOT-INF/lib/logback-classi
c-1.1.11.jar!/
```
请记下你的classLoaderHash，后面需要使用它。在这里，它是 `2a139a55`。
请记下你的classLoaderHash，后面需要使用它。在这里，它是 `5674cd4d`。
注意：请使用你的classLoaderHash值覆盖 `<classLoaderHash>` ，然后手动执行下面所述命令：
@ -62,42 +55,32 @@
如果你使用`-c`，你需要手动输入hashcode：`-c <hashcode>`
```bash
$ logger -c 2a139a55
$ logger -c 5674cd4d
```
对于只有唯一实例的ClassLoader可以通过`--classLoaderClass`指定class name，使用起来更加方便：
`logger --classLoaderClass sun.misc.Launcher$AppClassLoader`{{execute T2}}
`logger --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader`{{execute T2}}
```bash
[arthas@2062]$ logger --classLoaderClass sun.misc.Launcher$AppClassLoader
name ROOT
class ch.qos.logback.classic.Logger
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
level DEBUG
effectiveLevel DEBUG
additivity true
codeSource file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
appenders name CONSOLE
class ch.qos.logback.core.ConsoleAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
target System.out
name APPLICATION
class ch.qos.logback.core.rolling.RollingFileAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
file app.log
name ASYNC
class ch.qos.logback.classic.AsyncAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
appenderRef [APPLICATION]
[arthas@2062]$ logger --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader
name ROOT
class ch.qos.logback.classic.Logger
classLoader org.springframework.boot.loader.LaunchedURLClassLoader@5674cd4d
classLoaderHash 5674cd4d
level INFO
effectiveLevel INFO
additivity true
codeSource jar:file:/home/scrapbook/tutorial/demo-arthas-spring-boot.jar!/BOOT-INF/lib/logback-classi
c-1.1.11.jar!/
appenders name CONSOLE
class ch.qos.logback.core.ConsoleAppender
classLoader org.springframework.boot.loader.LaunchedURLClassLoader@5674cd4d
classLoaderHash 5674cd4d
target System.out
...
```
* 注: 这里classLoaderClass 在 java 8 是 sun.misc.Launcher$AppClassLoader，而java 11的classloader是jdk.internal.loader.ClassLoaders$AppClassLoader，katacoda目前环境是java8。
`--classLoaderClass` 的值是ClassLoader的类名，只有匹配到唯一的ClassLoader实例时才能工作，目的是方便输入通用命令，而`-c <hashcode>`是动态变化的。
#### 更新logger level
@ -109,16 +92,18 @@ $ logger -c 2a139a55
update logger level success.
```
注意：在教程中执行会提示错误，需要指定classloader
#### 指定classloader更新 logger level
默认情况下，logger命令会在SystemClassloader下执行，如果应用是传统的`war`应用，或者spring boot fat jar启动的应用，那么需要指定classloader。
可以先用 `sc -d yourClassName` 来查看具体的 classloader hashcode，然后在更新level时指定classloader：
`logger --classLoaderClass sun.misc.Launcher$AppClassLoader --name ROOT --level debug`{{execute T2}}
`logger --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader --name ROOT --level debug`{{execute T2}}
```bash
[arthas@2062]$ logger --classLoaderClass sun.misc.Launcher$AppClassLoader --name ROOT --level debug
[arthas@2062]$ logger --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader --name ROOT --level debug
```
#### 查看没有appender的logger的信息
@ -132,46 +117,18 @@ update logger level success.
```bash
[arthas@2062]$ logger --include-no-appender
name ROOT
class ch.qos.logback.classic.Logger
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
level DEBUG
effectiveLevel DEBUG
additivity true
codeSource file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
appenders name CONSOLE
class ch.qos.logback.core.ConsoleAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
target System.out
name APPLICATION
class ch.qos.logback.core.rolling.RollingFileAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
file app.log
name ASYNC
class ch.qos.logback.classic.AsyncAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
appenderRef [APPLICATION]
name com
class ch.qos.logback.classic.Logger
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
level null
effectiveLevel DEBUG
additivity true
codeSource file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
name com.alibaba
class ch.qos.logback.classic.Logger
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
level null
effectiveLevel DEBUG
additivity true
codeSource file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
name org.thymeleaf
class ch.qos.logback.classic.Logger
classLoader org.springframework.boot.loader.LaunchedURLClassLoader@5674cd4d
classLoaderHash 5674cd4d
level null
effectiveLevel INFO
additivity false
codeSource jar:file:/home/scrapbook/tutorial/demo-arthas-spring-boot.jar!/BOOT-INF/lib/logback-classi
c-1.1.11.jar!/
appenders name DEBUG_LEVEL_REMAPPER
class org.springframework.boot.logging.logback.LevelRemappingAppender
classLoader org.springframework.boot.loader.LaunchedURLClassLoader@5674cd4d
classLoaderHash 5674cd4d
...
```

11
tutorials/katacoda/command-logger-en/arthas-demo.md
View File

@ -1,11 +0,0 @@
Download `arthas-demo.jar` and start with the `java -jar` command:
`wget https://arthas.aliyun.com/arthas-demo.jar
java -jar arthas-demo.jar`{{execute T1}}
`arthas-demo` is a very simple program that randomly generates integers, performs factorization, and prints the results.
If the generated random number is negative, a error message will be printed.

4
tutorials/katacoda/command-logger-en/index.json
View File

@ -6,8 +6,8 @@
"details": {
"steps": [
{
"title": "Arthas demo",
"text": "arthas-demo.md"
"title": "Start demo",
"text": "start-demo.md"
},
{
"title": "Start arthas-boot",

163
tutorials/katacoda/command-logger-en/logger.md
View File

@ -9,29 +9,21 @@ Print the logger information, update the logger level
```bash
[arthas@2062]$ logger
name ROOT
class ch.qos.logback.classic.Logger
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
level INFO
effectiveLevel INFO
additivity true
codeSource file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
appenders name CONSOLE
class ch.qos.logback.core.ConsoleAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
target System.out
name APPLICATION
class ch.qos.logback.core.rolling.RollingFileAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
file app.log
name ASYNC
class ch.qos.logback.classic.AsyncAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
appenderRef [APPLICATION]
name ROOT
class ch.qos.logback.classic.Logger
classLoader org.springframework.boot.loader.LaunchedURLClassLoader@5674cd4d
classLoaderHash 5674cd4d
level INFO
effectiveLevel INFO
additivity true
codeSource jar:file:/home/scrapbook/tutorial/demo-arthas-spring-boot.jar!/BOOT-INF/lib/logback-classi
c-1.1.11.jar!/
appenders name CONSOLE
class ch.qos.logback.core.ConsoleAppender
classLoader org.springframework.boot.loader.LaunchedURLClassLoader@5674cd4d
classLoaderHash 5674cd4d
target System.out
...
```
#### View logger information for the special name
@ -40,18 +32,19 @@ Print the logger information, update the logger level
```bash
[arthas@2062]$ logger -n org.springframework.web
name org.springframework.web
class ch.qos.logback.classic.Logger
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
level null
effectiveLevel INFO
additivity true
codeSource file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
name org.springframework.web
class ch.qos.logback.classic.Logger
classLoader org.springframework.boot.loader.LaunchedURLClassLoader@5674cd4d
classLoaderHash 5674cd4d
level null
effectiveLevel INFO
additivity true
codeSource jar:file:/home/scrapbook/tutorial/demo-arthas-spring-boot.jar!/BOOT-INF/lib/logback-classi
c-1.1.11.jar!/
```
Please write down your classLoaderHash here, in the case here, it's `2a139a55`. It will be used in the future steps.
Please write down your classLoaderHash here, in the case here, it's `5674cd4d`. It will be used in the future steps.
Note: Please replace `<classLoaderHash>` with your classLoaderHash above, then execute the commands manually in the following steps:
@ -62,42 +55,32 @@ Note that the hashcode changes, you need to check the current ClassLoader inform
if you use`-c`, you have to manually type hashcode by `-c <hashcode>`.
```bash
$ logger -c 2a139a55
$ logger -c 5674cd4d
```
For classloader with only one instance, it can be specified by `--classLoaderClass` using class name, which is more convenient to use.
`logger --classLoaderClass sun.misc.Launcher$AppClassLoader`{{execute T2}}
`logger --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader`{{execute T2}}
```bash
[arthas@2062]$ logger --classLoaderClass sun.misc.Launcher$AppClassLoader
name ROOT
class ch.qos.logback.classic.Logger
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
level DEBUG
effectiveLevel DEBUG
additivity true
codeSource file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
appenders name CONSOLE
class ch.qos.logback.core.ConsoleAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
target System.out
name APPLICATION
class ch.qos.logback.core.rolling.RollingFileAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
file app.log
name ASYNC
class ch.qos.logback.classic.AsyncAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
appenderRef [APPLICATION]
[arthas@2062]$ logger --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader
name ROOT
class ch.qos.logback.classic.Logger
classLoader org.springframework.boot.loader.LaunchedURLClassLoader@5674cd4d
classLoaderHash 5674cd4d
level INFO
effectiveLevel INFO
additivity true
codeSource jar:file:/home/scrapbook/tutorial/demo-arthas-spring-boot.jar!/BOOT-INF/lib/logback-classi
c-1.1.11.jar!/
appenders name CONSOLE
class ch.qos.logback.core.ConsoleAppender
classLoader org.springframework.boot.loader.LaunchedURLClassLoader@5674cd4d
classLoaderHash 5674cd4d
target System.out
...
```
* PS: Here the classLoaderClass in java 8 is sun.misc.Launcher$AppClassLoader, while in java 11 it's jdk.internal.loader.ClassLoaders$AppClassLoader. Currently katacoda using java 8.
The value of `--classloaderclass` is the class name of classloader. It can only work when it matches a unique classloader instance. The purpose is to facilitate the input of general commands. However, `-c <hashcode>` is dynamic.
#### Update logger level
@ -109,16 +92,18 @@ The value of `--classloaderclass` is the class name of classloader. It can only
update logger level success.
```
PS: Here it will come up with an error message in tutorial, we have to specify the classloader.
#### Speecify classloader to update logger level
By default，logger command will be executed under SystemClassloader, if the application is a traditional `war`, or using spring boot fat jar, then it needs to specify classloader。
You can first use `sc -d yourClassName` to check specified classloader hashcode，then specify classloader when updating logger level:
`logger --classLoaderClass sun.misc.Launcher$AppClassLoader --name ROOT --level debug`{{execute T2}}
`logger --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader --name ROOT --level debug`{{execute T2}}
```bash
[arthas@2062]$ logger --classLoaderClass sun.misc.Launcher$AppClassLoader --name ROOT --level debug
[arthas@2062]$ logger --classLoaderClass org.springframework.boot.loader.LaunchedURLClassLoader --name ROOT --level debug
```
#### View the logger information without appenders
@ -132,46 +117,18 @@ Note that the output will usually be very long.
```bash
[arthas@2062]$ logger --include-no-appender
name ROOT
class ch.qos.logback.classic.Logger
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
level DEBUG
effectiveLevel DEBUG
additivity true
codeSource file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
appenders name CONSOLE
class ch.qos.logback.core.ConsoleAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
target System.out
name APPLICATION
class ch.qos.logback.core.rolling.RollingFileAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
file app.log
name ASYNC
class ch.qos.logback.classic.AsyncAppender
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
appenderRef [APPLICATION]
name com
class ch.qos.logback.classic.Logger
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
level null
effectiveLevel DEBUG
additivity true
codeSource file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
name com.alibaba
class ch.qos.logback.classic.Logger
classLoader sun.misc.Launcher$AppClassLoader@2a139a55
classLoaderHash 2a139a55
level null
effectiveLevel DEBUG
additivity true
codeSource file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
name org.thymeleaf
class ch.qos.logback.classic.Logger
classLoader org.springframework.boot.loader.LaunchedURLClassLoader@5674cd4d
classLoaderHash 5674cd4d
level null
effectiveLevel INFO
additivity false
codeSource jar:file:/home/scrapbook/tutorial/demo-arthas-spring-boot.jar!/BOOT-INF/lib/logback-classi
c-1.1.11.jar!/
appenders name DEBUG_LEVEL_REMAPPER
class org.springframework.boot.logging.logback.LevelRemappingAppender
classLoader org.springframework.boot.loader.LaunchedURLClassLoader@5674cd4d
classLoaderHash 5674cd4d
...
```

14
tutorials/katacoda/command-logger-en/start-demo.md Normal file
View File

@ -0,0 +1,14 @@
Download `demo-arthas-spring-boot.jar`, and start with `java -jar` command:
`wget https://github.com/hengyunabc/spring-boot-inside/raw/master/demo-arthas-spring-boot/demo-arthas-spring-boot.jar
java -jar demo-arthas-spring-boot.jar`{{execute T1}}
`demo-arthas-spring-boot` is a simple Spring Boot demo, the source code here: [View](https://github.com/hengyunabc/spring-boot-inside/tree/master/demo-arthas-spring-boot)
After booting, access port 80: https://[[HOST_SUBDOMAIN]]-80-[[KATACODA_HOST]].environments.katacoda.com
![Demo Web](/arthas/scenarios/common-resources/assets/demo-web.png)