diff --git a/shell/os_repo_speed_test.sh b/shell/os_repo_speed_test.sh
new file mode 100644
index 0000000..6bdc73a
--- /dev/null
+++ b/shell/os_repo_speed_test.sh
@@ -0,0 +1,135 @@
+#!/bin/env bash
+# 
+# lework
+# Os repo mirror site speed test.
+
+
+######################################################################################################
+# environment configuration
+######################################################################################################
+
+# Colors
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[0;33m'
+BLUE='\033[0;36m'
+PLAIN='\033[0m'
+
+declare -A mirrors
+mirrors=(
+  [edu_sjtu]="http://ftp.sjtu.edu.cn/"
+  [edu_ustc]="https://mirrors.ustc.edu.cn/"
+  [edu_lzu]="http://mirror.lzu.edu.cn/"
+  [edu_bjtu]="https://mirror.bjtu.edu.cn/"
+  [edu_bit]="http://mirror.bit.edu.cn/"
+  [edu_cqu]="http://mirrors.cqu.edu.cn/"
+  [edu_dlut]="http://mirror.dlut.edu.cn/"
+  [edu_zju]="http://mirrors.zju.edu.cn/"
+  [edu_tsinghua]="https://mirrors.tuna.tsinghua.edu.cn/"
+  [sohu]="http://mirrors.sohu.com/"
+  [huawei]="https://mirrors.huaweicloud.com/"
+  [netease]="http://mirrors.cn99.com/"
+  [tencent]="https://mirrors.cloud.tencent.com/"
+  [aliyun]="https://mirrors.aliyun.com/"
+)
+
+######################################################################################################
+# function
+######################################################################################################
+
+function shutdown() {
+  tput cnorm # reset cursor
+}
+
+
+function error() {
+  ps -ef | grep "$0" | awk '{print $2}' | xargs kill -9 '{}' >/dev/null 2>&1
+}
+
+trap shutdown EXIT
+trap error ERR 2 3
+
+function spinner() {
+  # make sure we use non-unicode character type locale 
+  # (that way it works for any locale as long as the font supports the characters)
+  local LC_CTYPE=C
+  speed_test "$@" &
+  sleep 1
+
+  local pid=$(ps -ef | grep -E '[w]get.*-4O /dev/null -T300' | awk '{print $2}') # Process Id of the previous running command
+
+  local spin='◐◓◑◒'
+  local charwidth=3
+
+  local i=0 
+  tput civis # cursor invisible
+  while kill -0 $pid 2>/dev/null; do
+    local i=$(((i + $charwidth) % ${#spin}))
+    printf "%s" "${spin:$i:$charwidth}"
+
+    echo -en "\033[1D"
+    sleep .1
+  done
+  tput cnorm
+  wait
+}
+
+speed_test() {
+    local output=$(LANG=C wget ${3:+"--header="}"$3" -4O /dev/null -T300 "$1" 2>&1)
+    local speed=$(printf '%s' "$output" | awk '/\/dev\/null/ {speed=$3 $4} END {gsub(/\(|\)/,"",speed); print speed}')
+    local ipaddress=$(printf '%s' "$output" | awk -F'|' '/Connecting to .*\|([^\|]+)\|/ {print $2}'| tail -1)
+    local time=$(printf '%s' "$output" | awk -F= '/100% / {print $2}')
+    local size=$(printf '%s' "$output" | awk '/Length:/ {s=$3} END {gsub(/\(|\)/,"",s); print s}')
+    printf "${YELLOW}%-14s${GREEN}%-20s${BLUE}%-14s${PLAIN}%-20s${RED}%-14s${PLAIN}\n" "$2" "${ipaddress}" "${size}" "${time}" "${speed}" 
+}
+
+
+######################################################################################################
+# main 
+######################################################################################################
+
+if  [ ! -e '/usr/bin/wget' ]; then
+    echo "Error: wget command not found. You must be install wget command at first."
+    exit 1
+fi
+
+if  [ ! -e '/usr/bin/curl' ]; then
+    echo "Error: curl command not found. You must be install curl command at first."
+    exit 1
+fi
+
+clear
+echo -e "\n\nOs repo mirror site speed test"
+
+os=`cat /etc/*-release | grep '^ID=' | \
+  sed 's/^ID=["]*\([a-zA-Z]*\).*$/\1/' | \
+  tr '[:upper:]' '[:lower:]'`
+
+os=${os:-centos}
+case "$os" in
+  centos)
+    file="centos/filelist.gz"
+    ;;
+  debian)
+    file="/debian/ls-lR.gz"
+    ;;
+  *)
+    file="centos/filelist.gz"
+    ;;
+esac
+
+echo -e "\n[Mirror Site]"
+for mirror in ${!mirrors[*]}; do
+  printf "${PLAIN}%-14s${GREEN}%-20s${PLAIN}\n" ${mirror} ":  ${mirrors[$mirror]}"
+done
+
+echo -e "\n[Test]"
+echo -e "Test OS       : ${YELLOW}${os}${PLAIN}"
+echo -e "Download File : ${YELLOW}${file}${PLAIN}"
+
+echo
+printf "%-14s%-20s%-14s%-20s%-14s\n" "Site Name" "IPv4 address" "File Size" "Download Time" "Download Speed"
+for mirror in ${!mirrors[*]}; do
+  spinner "${mirrors[$mirror]}${file}" ${mirror}
+done
+echo