Update FAQ.md

documentation/FAQ.md

@@ -7,6 +7,6 @@ Frequently Asked Questions
 
 * If dump analysis (`dotnet-dump analyze`) on Microsoft .NET Core SDK Linux docker images fails with an`Unhandled exception: System.DllNotFoundException: Unable to load shared library 'libdl.so' or one of its dependencies` exception. Try installing the "libc6-dev" package.
 
-* During dump collection (`dotnet-dump collect`) a failure ending in a message like `Permission denied /tmp/dotnet-diagnostic-19668-22628141-socket error` hints you don't have access to use such a socket. Verify the target process is owned by the user trying to create the dump, or trigger dump creation command with `sudo`
+* During dump collection (`dotnet-dump collect`) a failure ending in a message like `Permission denied /tmp/dotnet-diagnostic-19668-22628141-socket error` hints you don't have access to use such a socket. Verify the target process is owned by the user trying to create the dump, or trigger dump creation command with `sudo`. If you use `sudo` to collect the dump, make sure the dump file output path is accessible by the target process/user (via the --output option). The default dump path is the in the current directory and may not be the same user as the target process.
 
 * If dump collection (`dotnet-dump collect`) fails with `Core dump generation FAILED 0x80004005` look for error message output on the target process's console (not the console executing the dotnet-dump collect). This error may be caused by writing the core dump to a protected, inaccessible or non-existent location. To get more information about the core dump generation add the `--diag` option the dotnet-dump collect command and look for the diagnostic logging on the target process's console.