Category: Technology

How to modify the local version of Linux kernel?

Execute “make menuconfig” command, then select “General setup” -> “Local version - append to kernel release“. Add you preferred name, e.g.: “.nan“, then save it.

Check if it is saved in .config file successfully:

[root@linux]# grep -i ".nan" .config
CONFIG_LOCALVERSION=".nan"

After making sure it is saved successfully, you can execute “make” command.

Fix “unsupported protocol scheme” issue in golang

When using “http” package in golang, you should use the full domain name, For example:

package main
import (
    "net/http"
    "fmt"
    "io/ioutil"
    "os"
)

func main() {
    resp, err := http.Get("www.google.com")
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }

    text, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }

    fmt.Println(string(text))
}

Executing it, the error will be:

Get www.google.com: unsupported protocol scheme ""

Add “http://” before “www.google.com“, then executing it. The result is OK:

<!doctype html><html itemscope="" itemtype="http://schema.org/WebPage" lang="en"><head><meta co....

P.S., the full code is here.