diff --git a/chsrc.c b/chsrc.c
index 67d999c..c6b1a37 100644
--- a/chsrc.c
+++ b/chsrc.c
@@ -128,6 +128,35 @@ pl_ruby_chsrc (char* option)
   xy_success(xy_strjoin("chsrc: 感谢镜像提供方：", source_name));
 }
 
+void
+os_ubuntu_chsrc (char* option)
+{
+  int selected = 0;
+  for (int i=0;i<sizeof(os_ubuntu_sources);i++) {
+    // 循环测速
+  }
+  const char* source_name = os_ubuntu_sources[selected].mirror->name;
+  const char* source_abbr = os_ubuntu_sources[selected].mirror->abbr;
+  const char* source_url  = os_ubuntu_sources[selected].url;
+
+  char* beifen = "cp -rf /etc/apt/sources.list /etc/apt/sources.list.bak";
+  system(beifen);
+  // free(beifen);
+  puts("备份文件名: /etc/apt/sources.list.bak");
+  const char* current_url = xy_strch(source_url,'/',"\\/");
+
+  char* cmd = xy_strjoin(xy_strjoin("sed -E \'s/(^[^#]* .*)http[:|\\.|\\/|a-z|A-Z]*\\/ubuntu\\//\\1",current_url),"/\'< /etc/apt/sources.list.bak | cat > /etc/apt/sources.list");
+  system(cmd);
+  free(cmd);
+
+  char* rm = "rm -rf /etc/apt/source.list.bak";
+  system(rm);
+  // free(rm);
+
+  puts("chsrc: 为'ubuntu'命令换源");
+  puts(xy_strjoin("chsrc: 感谢镜像提供方：", source_name));
+}
+
 #define chsrcfunc(func) (const char const*)func
 static const char const
 *pl_ruby[]   = {"gem",  "ruby",    "rb",       NULL,          chsrcfunc(pl_ruby_chsrc)  },
@@ -142,12 +171,19 @@ static const char const
 *pl_maven[]  = {"maven", NULL},
 *pl_gradle[] = {"gradel",NULL},
 *pl_julia[]  = {"julia", NULL},
+
+*os_ubuntu[] = {"ubuntu", NULL,  chsrcfunc(os_ubuntu_chsrc)},
 // Java暂时需要直接指定包管理器
 // pl_java
 **pl_packagers[] = {
   pl_ruby, pl_python, pl_nodejs, pl_perl,  pl_php,    pl_cran,
   pl_rust, pl_go,     pl_dotnet, pl_maven, pl_gradle, pl_julia
+},
+**os_packagers[] = {
+  os_ubuntu
 };
+// static const char const
+// *os_ubuntu[] = {"ubuntu", NULL,  cmdfunc(os_ubuntu_chsrc)};
 #undef chsrcfunc
 
 static const char const*
@@ -224,6 +260,27 @@ main (int argc, char const *argv[])
     int k = 0;
     const char* alias = packager[k];
     while (NULL!=alias) {
+      printf("%s matched: %s\n",target, alias);
+      if (0==strcmp(target, alias)) {
+        // printf("matched: %s\n", alias);
+        matched = 1; break;
+      }
+      k++;
+      alias = packager[k];
+    }
+    if (matched) {
+      do {
+        k++; alias = packager[k];
+      } while (NULL!=alias);
+      call_cmd ((void*) packager[k+1], cmdarg);
+    }
+  }
+  for (int i=0; i<Array_Size(os_packagers); i++) {
+    const char const** packager = os_packagers[i];
+    int k = 0;
+    const char* alias = packager[k];
+    while (NULL!=alias) {
+      // printf("%s matched: %s\n",target, alias);
       if (0==strcmp(target, alias)) {
         // printf("matched: %s\n", alias);
         matched = 1; break;
diff --git a/chsrc.h b/chsrc.h
index 0b73222..5e8f240 100644
--- a/chsrc.h
+++ b/chsrc.h
@@ -29,12 +29,15 @@ mirror_info
   Bfsu          = {"BFSU",     "北京外国语大学开源软件镜像站"},
   Pku           = {"PKU",      "北京大学开源镜像站"},
   Bjtu          = {"BJTU",     "北京交通大学自由与开源软件镜像站"},
-  Sustech       = {"SUSTech",  "南方科技大学开源软件镜像站"};
+  Sustech       = {"SUSTech",  "南方科技大学开源软件镜像站"},
+  Ustc          = {"USTC",     "中国科学技术大学开源镜像站"},
 
 // 大型公司
 mirror_info
   Ali      = {"Ali OPSX", "阿里巴巴开源镜像站"},
   Tencent  = {"Tencent",  "腾讯软件源"};
+  Netease  = {"Netease",  "网易开源镜像站"},
+  Sohu     = {"SOHU",     "搜狐开源镜像站"};
 
 // 开源社区
 mirror_info
@@ -73,6 +76,17 @@ pl_python_sources[] = {
 };
 
 
+static source_info
+os_ubuntu_sources[] = {
+  {&Ali,       "https://mirrors.aliyun.com/ubuntu/"},
+  {&Bfsu,      "https://mirrors.bfsu.edu.cn/ubuntu/"},
+  {&Ustc,      "https://mirrors.ustc.edu.cn/ubuntu/"},
+  {&Tuna,      "https://mirrors.tuna.tsinghua.edu.cn/ubuntu/"},
+  {&Tencent,   "https://mirrors.tencent.com/ubuntu/"},
+  {&Wy,        "https://mirrors.163.com/ubuntu/"},
+  {&Sohu,      "https://mirrors.sohu.com/ubuntu/"},
+};
+
 
 /* 函数签名 */
 bool does_the_program_exist (char* check_cmd, char* progname);
diff --git a/helper.h b/helper.h
index e382772..f479eb4 100644
--- a/helper.h
+++ b/helper.h
@@ -98,6 +98,39 @@ xy_log (int level, const char* str)
 #define xy_error(str) xy_log (XY_ERROR, str)
 
 
+/*
+ * 
+ * 
+ * 
+ * 
+ * 
+ * */
+static char*
+xy_strch (const char* str, char src,const char* dest)
+{
+  size_t str_len  = strlen(str);
+  size_t dest_len  = strlen(dest);
+  size_t size = str_len*dest_len;
+  char* ret  = (char*)malloc(size);
+  int i=0;
+  int j=0;
+  while(i<str_len) {
+    if(str[i]==src) {
+      int k=0;
+      while(k<dest_len){
+        ret[j++] = dest[k++];
+      }
+      i++;
+    }
+    else {
+      ret[j++] = str[i++];
+    }
+  }
+  ret[j] = 0;
+  return ret;
+}
+
+
 static void
 xy_success (const char* str1)
 {