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Ethereum: Where is the debug.log file?

As an aspiring Ethereum developer on a 64-bit Ubuntu 17.04 system, you are probably following a tutorial to create your own altcoin. However, you may have noticed that after compiling the Bitcoin source code (daemon or Qt), you get an error message indicating the presence of a `debug.log'' file.

In this article, we will examine the location of thedebug.log'' file in the Bitcoin source code, and provide insight into its significance and how to access it.

The problem: where is debug.log?

When you compile the Bitcoin source code on a 64-bit Ubuntu system, a new executable file is created (typically namedbitcoin-qt'' orbitcoin-daemon''). At first glance, this may seem like an unusual filename for Bitcoin-related programs. However, it is important to understand that these executable files contain debugging information.

The solution: access the debug log

To access the "debug.log" file, you need to find the corresponding executables in your system's/usr/local/bin’ directory (or similar paths on your system). Once you have found them, open one of the executables and look for a line that starts with the string “- debug -log” or “–debug= -log”. This indicates that the executable is logging debug information.

For example:

  • Open the “bitcoin-daemon” executable: “sudo ./bitcoin-daemon”
  • Look for a line that starts with -debug-log: ...-debug-log

Alternatively, you can use your system’s File Explorer to navigate to /usr/local/bin/bitcoin-qt' and look for thedebug.log` file. If it exists, you should be able to find it by searching for similar filenames.

Debug Tips

To improve your debugging experience when working with Bitcoin-related programs:

  • Check compiler flags

    : Check the command line used to compile the Bitcoin source code and make sure it includes the “-debug -log” flag.

  • Use the “–verbose” flag: Try using the “–verbose” flag instead of “-debug -log” to get more verbose output from the executable.
  • Search for similar files: If you can’t find the “debug.log” file, try searching for other debugging-related files in your system directory.

Conclusion

Ethereum: Where is debug.log file in Bitcoin source code?

If you understand where the “debug.log” file is located in the Bitcoin source code and access it using the appropriate command line flags or file manager, you should be able to troubleshoot issues with these core components of the Bitcoin ecosystem.