diff --git a/lldb/source/Commands/CommandObjectProcess.cpp b/lldb/source/Commands/CommandObjectProcess.cpp
--- a/lldb/source/Commands/CommandObjectProcess.cpp
+++ b/lldb/source/Commands/CommandObjectProcess.cpp
@@ -409,6 +409,10 @@
       }
     } else {
       result.AppendErrorWithFormat("attach failed: %s\n", error.AsCString());
+      result.AppendMessage(
+          "Could not attach to process. If your uid matches the uid of the target process, \n" 
+          "check the setting of /proc/sys/kernel/yama/ptrace_scope, \n" 
+          "or try again as the root user. \n");
     }
 
     if (!result.Succeeded())