I'm trying to test a .NET 8 console app in Azure CLI, but I see an error. I used "Manage files" to upload the exe and all needed files:
PS /home/david> ls
Azure.Core.dll clouddrive ConsoleAppExecRemoteAppToProcessFiles.exe Microsoft System.IO.Hashing.dll
Azure.Storage.Blobs.dll ConsoleAppExecRemoteAppToProcessFiles.deps.json ConsoleAppExecRemoteAppToProcessFiles.pdb Microsoft.Bcl.AsyncInterfaces.dll System.Memory.Data.dll
Azure.Storage.Common.dll ConsoleAppExecRemoteAppToProcessFiles.dll ConsoleAppExecRemoteAppToProcessFiles.runtimeconfig.json System.ClientModel.dll
Then I tried to run this command:
PS /home/david> Start-Process -FilePath '/home/david/ConsoleAppExecRemoteAppToProcessFiles.exe'
Start-Process: An error occurred trying to start process '/home/david/ConsoleAppExecRemoteAppToProcessFiles.exe' with working directory '/home/david'. Permission denied
Any ideas?
As the file-system path implies and as you confirm in a comment, you're running in a Linux environment; specifically, Azure Linux 3.0.
The error message implies that your user account doesn't have permission to execute the target file, most likely because the file isn't designated as executable, meaning that its file-system permissions, stored in the so-called file mode and manipulated e.g. with utilities such as chmod, do not grant you the Execute (x) permission.
On Unix-like platforms such as Linux, whether a given file can be executed (run as a program) is solely guided by its file-system permissions, unlike on Windows, where executability is controlled via file-name extensions such as .exe.
Note that, sensibly, regular files (as opposed to directories) created on Unix-like platforms do not turn on Execute permissions by default (for directories, the Execute permission means that the content and metadata of file contained therein may be accessed; the specific default file mode is controlled via the umask utility).
To put it differently: It requires a deliberate act to make a file executable on Unix-like platforms (though development utilities such as linkers may do that for you).
Solutions:
While you could try to make your file executable (e.g. with chmod a+x /home/david/ConsoleAppExecRemoteAppToProcessFiles.exe on the target platform), that is unlikely to succeed, given that the .exe extension implies that your file is a binary file that was compiled for Windows.
Trying to execute such a file on a Unix-like platform would result in an error complaining about an incompatible executable file format, e.g. Exec format error.
You have two options:
Create a cross-platform binary in the form of a *.dll, which, however, makes the binary a framework-dependent one, which means that a compatible .NET runtime must be present, and your DLL must be invoked via the dotnet utility.
Create a self-contained platform-specific binary (specific to an operating system and CPU architecture):
You can target a different platform from the one you're developing on by passing a -r argument to dotnet publish, specifying the desired RID (Runtime Identifier]) - see the RID Catalog for available identifiers:
# Use linux-Arm64 to target Arm64 distros of Azure Linux
dotnet publish -r linux-x64 --self-contained
The above assumes that the target Azure Linux distro is for the x86-86 CPU architecture; if it is ARM64 instead, replace linux-x64 with linux-Arm64.
On the target platform, running the following in PowerShell will tell you the CPU architecture:
[System.Runtime.InteropServices.RuntimeInformation]::OSArchitecture
See Produce an executable for more information.