Improve username update error message

[signal-cli] / README.md

diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,30 +1,29 @@
 # signal-cli
 
 # signal-cli
 

-signal-cli is a commandline interface
-for [libsignal-service-java](https://github.com/WhisperSystems/libsignal-service-java). It supports registering,
-verifying, sending and receiving messages. To be able to link to an existing Signal-Android/signal-cli instance,
-signal-cli uses a [patched libsignal-service-java](https://github.com/AsamK/libsignal-service-java), because
-libsignal-service-java does not yet
-support [provisioning as a linked device](https://github.com/WhisperSystems/libsignal-service-java/pull/21). For
-registering you need a phone number where you can receive SMS or incoming calls. signal-cli is primarily intended to be
-used on servers to notify admins of important events. For this use-case, it has a dbus
-interface ([man page](https://github.com/AsamK/signal-cli/blob/master/man/signal-cli-dbus.5.adoc)), that can be used to
-send messages from any programming language that has dbus bindings. It also has a JSON-RPC based interface, see
-the [documentation](https://github.com/AsamK/signal-cli/wiki/JSON-RPC-service) for more information.
+signal-cli is a commandline interface for the [Signal messenger](https://signal.org/).
+It supports registering, verifying, sending and receiving messages.
+signal-cli uses a [patched libsignal-service-java](https://github.com/Turasa/libsignal-service-java),
+extracted from the [Signal-Android source code](https://github.com/signalapp/Signal-Android/tree/main/libsignal-service).
+For registering you need a phone number where you can receive SMS or incoming calls.
+
+signal-cli is primarily intended to be used on servers to notify admins of important events.
+For this use-case, it has a daemon mode with JSON-RPC interface ([man page](https://github.com/AsamK/signal-cli/blob/master/man/signal-cli-jsonrpc.5.adoc))
+and D-BUS interface ([man page](https://github.com/AsamK/signal-cli/blob/master/man/signal-cli-dbus.5.adoc)) .
+For the JSON-RPC interface there's also a simple [example client](https://github.com/AsamK/signal-cli/tree/master/client), written in Rust.

 
 ## Installation
 
 
 ## Installation
 

-You can [build signal-cli](#building) yourself, or use
+You can [build signal-cli](#building) yourself or use

 the [provided binary files](https://github.com/AsamK/signal-cli/releases/latest), which should work on Linux, macOS and
 the [provided binary files](https://github.com/AsamK/signal-cli/releases/latest), which should work on Linux, macOS and

-Windows. For Arch Linux there is also a [package in AUR](https://aur.archlinux.org/packages/signal-cli/) and there is
-a [FreeBSD port](https://www.freshports.org/net-im/signal-cli) available as well.
+Windows. There's also a [docker image and some Linux packages](https://github.com/AsamK/signal-cli/wiki/Binary-distributions) provided by the community.

 
 System requirements:
 
 
 System requirements:
 

-- at least Java Runtime Environment (JRE) 17
-- native libraries: libzkgroup, libsignal-client
+- at least Java Runtime Environment (JRE) 21
+- native library: libsignal-client

 
 

-  Those are bundled for x86_64 Linux (with recent enough glibc, see #643), for other systems/architectures
+  The native libs are bundled for x86_64 Linux (with recent enough glibc), Windows and MacOS. For other
+  systems/architectures

   see: [Provide native lib for libsignal](https://github.com/AsamK/signal-cli/wiki/Provide-native-lib-for-libsignal)
 
 ### Install system-wide on Linux
   see: [Provide native lib for libsignal](https://github.com/AsamK/signal-cli/wiki/Provide-native-lib-for-libsignal)
 
 ### Install system-wide on Linux


@@ -41,7 +40,6 @@ sudo ln -sf /opt/signal-cli-"${VERSION}"/bin/signal-cli /usr/local/bin/
 You can find further instructions on the Wiki:
 
 - [Quickstart](https://github.com/AsamK/signal-cli/wiki/Quickstart)
 You can find further instructions on the Wiki:
 
 - [Quickstart](https://github.com/AsamK/signal-cli/wiki/Quickstart)

-- [DBus Service](https://github.com/AsamK/signal-cli/wiki/DBus-service)

 
 ## Usage
 
 
 ## Usage
 


@@ -55,9 +53,9 @@ of all country codes.)
 
 * Register a number (with SMS verification)
 
 
 * Register a number (with SMS verification)
 

-        signal-cli -a ACCOUNT register
+      signal-cli -a ACCOUNT register

 
 

-  You can register Signal using a land line number. In this case you can skip SMS verification process and jump directly
+  You can register Signal using a landline number. In this case you can skip SMS verification process and jump directly

   to the voice call verification by adding the `--voice` switch at the end of above register command.
 
   Registering may require solving a CAPTCHA
   to the voice call verification by adding the `--voice` switch at the end of above register command.
 
   Registering may require solving a CAPTCHA


@@ -66,19 +64,21 @@ of all country codes.)
 * Verify the number using the code received via SMS or voice, optionally add `--pin PIN_CODE` if you've added a pin code
   to your account
 
 * Verify the number using the code received via SMS or voice, optionally add `--pin PIN_CODE` if you've added a pin code
   to your account
 

-        signal-cli -a ACCOUNT verify CODE
+      signal-cli -a ACCOUNT verify CODE

 
 * Send a message
 
 
 * Send a message
 

-        signal-cli -a ACCOUNT send -m "This is a message" RECIPIENT
+     ```sh
+     signal-cli -a ACCOUNT send -m "This is a message" RECIPIENT
+     ```

 
 * Pipe the message content from another process.
 
 
 * Pipe the message content from another process.
 

-        uname -a | signal-cli -a ACCOUNT send RECIPIENT
+      uname -a | signal-cli -a ACCOUNT send --message-from-stdin RECIPIENT

 
 * Receive messages
 
 
 * Receive messages
 

-        signal-cli -a ACCOUNT receive
+      signal-cli -a ACCOUNT receive

 
 **Hint**: The Signal protocol expects that incoming messages are regularly received (using `daemon` or `receive`
 command). This is required for the encryption to work efficiently and for getting updates to groups, expiration timer
 
 **Hint**: The Signal protocol expects that incoming messages are regularly received (using `daemon` or `receive`
 command). This is required for the encryption to work efficiently and for getting updates to groups, expiration timer


@@ -88,8 +88,8 @@ and other features.
 
 The password and cryptographic keys are created when registering and stored in the current users home directory:
 
 
 The password and cryptographic keys are created when registering and stored in the current users home directory:
 

-        $XDG_DATA_HOME/signal-cli/data/
-        $HOME/.local/share/signal-cli/data/
+    $XDG_DATA_HOME/signal-cli/data/
+    $HOME/.local/share/signal-cli/data/

 
 ## Building
 
 
 ## Building
 


@@ -98,44 +98,45 @@ version installed, you can replace `./gradlew` with `gradle` in the following st
 
 1. Checkout the source somewhere on your filesystem with
 
 
 1. Checkout the source somewhere on your filesystem with
 

-        git clone https://github.com/AsamK/signal-cli.git
+       git clone https://github.com/AsamK/signal-cli.git

 
 2. Execute Gradle:
 
 
 2. Execute Gradle:
 

-        ./gradlew build
+       ./gradlew build

 
    2a. Create shell wrapper in *build/install/signal-cli/bin*:
 
 
    2a. Create shell wrapper in *build/install/signal-cli/bin*:
 

-        ./gradlew installDist
+       ./gradlew installDist

 
    2b. Create tar file in *build/distributions*:
 
 
    2b. Create tar file in *build/distributions*:
 

-        ./gradlew distTar
+       ./gradlew distTar

 
    2c. Create a fat tar file in *build/libs/signal-cli-fat*:
 
 
    2c. Create a fat tar file in *build/libs/signal-cli-fat*:
 

-        ./gradlew fatJar
+       ./gradlew fatJar

 
    2d. Compile and run signal-cli:
 
 
    2d. Compile and run signal-cli:
 

-        ./gradlew run --args="--help"
+      ```sh
+      ./gradlew run --args="--help"
+      ```

 
 ### Building a native binary with GraalVM (EXPERIMENTAL)
 
 It is possible to build a native binary with [GraalVM](https://www.graalvm.org). This is still experimental and will not
 work in all situations.
 
 
 ### Building a native binary with GraalVM (EXPERIMENTAL)
 
 It is possible to build a native binary with [GraalVM](https://www.graalvm.org). This is still experimental and will not
 work in all situations.
 

-1. [Install GraalVM and setup the enviroment](https://www.graalvm.org/docs/getting-started/#install-graalvm)
-2. [Install prerequisites](https://www.graalvm.org/reference-manual/native-image/#prerequisites)
-3. Execute Gradle:
+1. [Install GraalVM and setup the environment](https://www.graalvm.org/docs/getting-started/#install-graalvm)
+2. Execute Gradle:

 
 

-        ./gradlew nativeCompile
+       ./gradlew nativeCompile

 
    The binary is available at *build/native/nativeCompile/signal-cli*
 
 ## FAQ and Troubleshooting
 
 
    The binary is available at *build/native/nativeCompile/signal-cli*
 
 ## FAQ and Troubleshooting
 

-For frequently asked questions and issues have a look at the [wiki](https://github.com/AsamK/signal-cli/wiki/FAQ)
+For frequently asked questions and issues have a look at the [wiki](https://github.com/AsamK/signal-cli/wiki/FAQ).

 
 ## License
 
 
 ## License