找不到所需的库 libhostfxr.so。网核 Linux

Question

 ❯ dotnet ef   
A fatal error occurred. The required library libhostfxr.so could not be found.
If this is a self-contained application, that library should exist in [/home/ru/.dotnet/tools/.store/dotnet-ef/6.0.2/dotnet-ef/6.0.2/tools/netcoreapp3.1/any/].
If this is a framework-dependent application, install the runtime in the global location [/usr/share/dotnet] or use the DOTNET_ROOT environment variable to specify the runtime location or register the runtime location in [/etc/dotnet].

The .NET runtime can be found at:
  - https://aka.ms/dotnet-core-applaunch?missing_runtime=true&arch=x64&rid=arch-x64&apphost_version=6.0.2

~

dotnet ef 不工作 在运行之后命令不起作用，我该怎么办？

Answer 1

通过在 shell 配置文件的任何部分添加这个解决（它可以在最后）：

# Netcore
export PATH=$PATH:$HOME/.dotnet/tools
export DOTNET_ROOT=$HOME/.dotnet
export PATH=$PATH:$DOTNET_ROOT

您的 shell 个人资料可以在这些文件之一中：

Bash Shell: ~/.bash_profile, ~/.bashrc
Korn Shell: ~/.kshrc 或 .profile
Z Shell: ~/.zshrc 或 .zprofile

不要忘记关闭再打开终端，这样环境变量就可以加载了。

More here

检查是否一切正常运行 dotnet ef，你应该得到这样的东西：

❯ dotnet ef

                     _/\__       
               ---==/    \      
         ___  ___   |.    \|\    
        | __|| __|  |  )   \\   
        | _| | _|   \_/ |  //|\ 
        |___||_|       /   \\/\

Entity Framework Core .NET Command-line Tools 6.0.2

Usage: dotnet ef [options] [command]

Options:
  --version        Show version information
  -h|--help        Show help information
  -v|--verbose     Show verbose output.
  --no-color       Don't colorize output.
  --prefix-output  Prefix output with level.

Commands:
  database    Commands to manage the database.
  dbcontext   Commands to manage DbContext types.
  migrations  Commands to manage migrations.

Use "dotnet ef [command] --help" for more information about a command.

Answer 2

尝试更新以下配置并使用最新版本dotnet-ef：

export PATH="$PATH:$HOME/.dotnet/tools"
export DOTNET_ROOT=/snap/dotnet-sdk/current
export MSBuildSDKsPath=$DOTNET_ROOT/sdk/$(${DOTNET_ROOT}/dotnet --version)/Sdks
export PATH="${PATH}:${DOTNET_ROOT}"
export PATH="$PATH:$HOME/.dotnet/tools"

Answer 3

我在使用 Snap version 时遇到了这个错误（以及许多其他错误）。当我切换到 package manager version.

时，这些问题都消失了

找不到所需的库 libhostfxr.so。网核 Linux

The required library libhostfxr.so could not be found. Netcore Linux

.net

entity-framework-core

.net-core

asp.net-core