Why does \'sudo go run main.go\' fail to find the executable on Ubuntu 16.04?

Understanding "sudo go run main.go" Permissions

When attempting to execute a Go program with "sudo go run main.go" on Ubuntu 16.04, you may encounter an error indicating that the executable file is not found in the $PATH variable. This occurs because the "sudo" command clears your environment variables by default, which prevents the "go" binary from being found.

Resolving the Issue

To resolve this issue, you should bypass the "sudo" command when compiling the program. Instead, build the binary without elevated permissions using "go build" or "go install". Once the binary is compiled, you can execute it with elevated permissions using "sudo".

Step-by-Step Instructions

1. Navigate to the directory containing "main.go".

2. Compile the binary without sudo:

   • go build
   • or -
   • go install

3. Execute the binary with elevated permissions:

   • sudo ./mycapt
   • or -
   • sudo $GOPATH/bin/mycapt

Explanation

By building the binary first without sudo, you ensure that the necessary environment variables, such as $GOPATH and $GOROOT, are set correctly. When you execute the binary with sudo, the appropriate permissions are granted without interfering with your environment variables.

This method effectively grants you the necessary permissions to capture network packets while maintaining the integrity of your environment variables.

The above is the detailed content of Why does \'sudo go run main.go\' fail to find the executable on Ubuntu 16.04?. For more information, please follow other related articles on the PHP Chinese website!