This is a tool help user auto update aria2 config file for linux.

tool/auto-update/README.md

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+# auto-update for linux
+This tool will download the best trackers list, and auto update the config file of aria2 "~/.aria2/aria2.conf".
+
+The default url is "https://raw.githubusercontent.com/ngosang/trackerslist/master/trackers_best.txt", you can change it by argument.
+
+这个小工具用于下载最佳tracker列表，并且自动更新aria2配置文件"~/.aria2/aria2.conf"。
+
+默认列表文件的下载地址是："https://raw.githubusercontent.com/ngosang/trackerslist/master/trackers_best.txt"，用户可以用参数改变下载地址。
+
+#### install(安装):
+    go get -v github.com/rocket049/trackerslist/tool/auto-update
+
+notice: You must install golang compiler first. 你必须先安装go语言编译器。
+
+#### Usage（用法）:
+```
+    //update default best list，下载默认最佳列表。
+    auto-update
+    //update special list，下载指定列表
+    auto-update [url of list]
+```

tool/auto-update/main.go

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+package main
+
+import (
+	"bufio"
+	"flag"
+	"net/http"
+	"os"
+	"path/filepath"
+	"text/template"
+)
+
+var listUrl = "https://raw.githubusercontent.com/ngosang/trackerslist/master/trackers_best.txt"
+
+var tmpl = `bt-tracker={{range $k, $v := .}}{{if eq $k 0}}{{$v}}{{else}},{{$v}}{{end}}{{end}}
+enable-dht=true
+bt-enable-lpd=true
+enable-peer-exchange=true
+`
+
+func downloadList() ([]string, error) {
+	resp, err := http.Get(listUrl)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	rd := bufio.NewReader(resp.Body)
+	res := []string{}
+	for {
+		line1, _, err := rd.ReadLine()
+		if err != nil {
+			break
+		}
+		//fmt.Println("url:", string(line1), len(line1))
+		if len(line1) > 0 {
+			res = append(res, string(line1))
+		}
+	}
+	return res, nil
+}
+
+func writeConf(data []string) error {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return err
+	}
+	confPath := filepath.Join(home, ".aria2", "aria2.conf")
+	fp, err := os.Create(confPath)
+	if err != nil {
+		return err
+	}
+	defer fp.Close()
+	t := template.New("")
+	t, err = t.Parse(tmpl)
+	if err != nil {
+		return err
+	}
+	return t.Execute(fp, data)
+}
+
+func main() {
+	flag.Parse()
+	if len(flag.Arg(0)) > 0 {
+		listUrl = flag.Arg(0)
+	}
+	list1, err := downloadList()
+	if err != nil {
+		panic(err.Error())
+	}
+	err = writeConf(list1)
+	if err != nil {
+		panic(err.Error())
+	}
+}