diff --git a/codes/linux/soft/README.md b/codes/linux/soft/README.md
index 56deb72..4ba17d8 100644
--- a/codes/linux/soft/README.md
+++ b/codes/linux/soft/README.md
@@ -233,3 +233,14 @@ wget -qO- https://gitee.com/turnon/linux-tutorial/raw/master/codes/linux/soft/fa
 curl -o- https://gitee.com/turnon/linux-tutorial/raw/master/codes/linux/soft/docker-install.sh | bash
 wget -qO- https://gitee.com/turnon/linux-tutorial/raw/master/codes/linux/soft/docker-install.sh | bash
 ```
+
+## FastDFS 安装
+
+说明：
+
+使用方法：执行以下任意命令即可执行脚本。
+
+```sh
+curl -o- https://gitee.com/turnon/linux-tutorial/raw/master/codes/linux/soft/fastdfs-install.sh | bash
+wget -qO- https://gitee.com/turnon/linux-tutorial/raw/master/codes/linux/soft/fastdfs-install.sh | bash
+```
diff --git a/codes/linux/soft/fastdfs-install.sh b/codes/linux/soft/fastdfs-install.sh
index 4ac701b..0ad79b4 100644
--- a/codes/linux/soft/fastdfs-install.sh
+++ b/codes/linux/soft/fastdfs-install.sh
@@ -47,7 +47,7 @@ nginx_version=1.16.0
 nginx_path=/opt/nginx
 
 printf "${GREEN}>>>>>>>> install required libs.${RESET}\n\n"
-yum install git gcc gcc-c++ make automake autoconf libtool pcre pcre-devel zlib zlib-devel openssl-devel wget vim -y
+yum install -y git gcc gcc-c++ make automake autoconf libtool pcre pcre-devel zlib zlib-devel openssl-devel wget vim unzip
 
 # download and decompression
 mkdir -p ${path}
@@ -95,6 +95,7 @@ make && make install
 printf "${GREEN}>>>>>>>>> fastdfs 配置文件准备${RESET}\n"
 # 配置修改参考：https://github.com/happyfish100/fastdfs/wiki
 
+mkdir -p /etc/fdfs
 cp ${path}/fastdfs/conf/http.conf /etc/fdfs/ #供nginx访问使用
 cp ${path}/fastdfs/conf/mime.types /etc/fdfs/ #供nginx访问使用
 cp ${path}/fastdfs-nginx-module/src/mod_fastdfs.conf /etc/fdfs
diff --git a/codes/shell/demos/variable-demo.sh b/codes/shell/demos/variable-demo.sh
index c7acaa1..3cb6fdf 100644
--- a/codes/shell/demos/variable-demo.sh
+++ b/codes/shell/demos/variable-demo.sh
@@ -1,8 +1,8 @@
 #!/usr/bin/env bash
 
 ################### 声明变量 ###################
-word="hello"
-echo ${word}
+name="world"
+echo "hello ${name}"
 # Output: hello
 
 ################### 只读变量 ###################
diff --git a/codes/shell/示例脚本/变量/变量基本使用.sh b/codes/shell/示例脚本/变量/变量基本使用.sh
new file mode 100644
index 0000000..22c6877
--- /dev/null
+++ b/codes/shell/示例脚本/变量/变量基本使用.sh
@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+################### 声明变量 ###################
+name="world"
+echo "hello ${name}"
+# Output: hello world
+
+################### 只读变量 ###################
+readonly_var="hello"
+echo ${readonly_var}
+# Output: hello
+readonly readonly_var
+# rword="bye"  # 如果放开注释，执行时会报错
+
+################### 删除变量 ###################
+dword="hello"  # 声明变量
+echo ${dword}  # 输出变量值
+# Output: hello
+
+unset dword    # 删除变量
+echo ${dword}
+# Output: （空）
diff --git a/codes/shell/示例脚本/变量/将输出结果赋值给变量.sh b/codes/shell/示例脚本/变量/将输出结果赋值给变量.sh
new file mode 100644
index 0000000..b935859
--- /dev/null
+++ b/codes/shell/示例脚本/变量/将输出结果赋值给变量.sh
@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+folder=$(pwd)
+echo "current path: ${folder}"
diff --git a/codes/shell/示例脚本/变量/系统变量.sh b/codes/shell/示例脚本/变量/系统变量.sh
new file mode 100644
index 0000000..3c9bb1c
--- /dev/null
+++ b/codes/shell/示例脚本/变量/系统变量.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+echo "User info fro userId:$USER"
+echo UID:$UID
+echo HOME:$HOME
diff --git a/codes/shell/示例脚本/基本脚本/使用自定义变量.sh b/codes/shell/示例脚本/变量/自定义变量.sh
similarity index 79%
rename from codes/shell/示例脚本/基本脚本/使用自定义变量.sh
rename to codes/shell/示例脚本/变量/自定义变量.sh
index 5dd633d..854b16d 100644
--- a/codes/shell/示例脚本/基本脚本/使用自定义变量.sh
+++ b/codes/shell/示例脚本/变量/自定义变量.sh
@@ -1,5 +1,4 @@
-#!/bin/bash
-#testing variables
+#!/usr/bin/env bash
 
 days=10
 guest="Katie"
diff --git a/codes/shell/示例脚本/字符串/字符串分割成数组.sh b/codes/shell/示例脚本/字符串/字符串分割成数组.sh
new file mode 100644
index 0000000..5f770fa
--- /dev/null
+++ b/codes/shell/示例脚本/字符串/字符串分割成数组.sh
@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+# ----------------------------------------------------------------------------------
+# 根据特定字符将一个字符串分割成数组
+# ----------------------------------------------------------------------------------
+
+str="0.0.0.1"
+OLD_IFS="$IFS"
+IFS="."
+array=(${str})
+IFS="$OLD_IFS"
+size=${#array[*]}
+lastIndex=`expr ${size} - 1`
+echo "数组长度：${size}"
+echo "最后一个数组元素：${array[${lastIndex}]}"
+for item in ${array[@]}
+do
+  echo "$item"
+done
diff --git a/codes/shell/示例脚本/字符串/字符串基本使用.sh b/codes/shell/示例脚本/字符串/字符串基本使用.sh
new file mode 100644
index 0000000..9401876
--- /dev/null
+++ b/codes/shell/示例脚本/字符串/字符串基本使用.sh
@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+
+################### 单引号和双引号 ###################
+################### 拼接字符串 ###################
+# 使用单引号拼接
+name1='white'
+str1='hello, '${name1}''
+str2='hello, ${name1}'
+echo ${str1}_${str2}
+# Output:
+# hello, white_hello, ${name1}
+
+# 使用双引号拼接
+name2="black"
+str3="hello, "${name2}""
+str4="hello, ${name2}"
+echo ${str3}_${str4}
+# Output:
+# hello, black_hello, black
+
+################### 获取字符串长度 ###################
+text="12345"
+echo "${text} length is: ${#text}"
+# Output:
+# 12345 length is: 5
+
+################### 获取字符串长度 ###################
+text="12345"
+echo ${text:2:2}
+# Output:
+# 34
+
+################### 查找子字符串 ###################
+text="hello"
+echo `expr index "${text}" ll`
+# Output:
+# 3
+
+################### 截取关键字左边内容 ###################
+full_branch="feature/1.0.0"
+branch=`echo ${full_branch#feature/}`
+echo "branch is ${branch}"
+
+################### 截取关键字右边内容 ###################
+full_version="0.0.1-SNAPSHOT"
+version=`echo ${full_version%-SNAPSHOT}`
+echo "version is ${version}"
+
+################### 判断字符串中是否包含子字符串 ###################
+result=$(echo "${str}" | grep "feature/")
+if [[ "$result" != "" ]] ; then
+  echo "feature/ 是 ${str} 的子字符串"
+else
+  echo "feature/ 不是 ${str} 的子字符串"
+fi
diff --git a/codes/shell/示例脚本/数组/数组基本使用.sh b/codes/shell/示例脚本/数组/数组基本使用.sh
new file mode 100644
index 0000000..65ff2ef
--- /dev/null
+++ b/codes/shell/示例脚本/数组/数组基本使用.sh
@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+
+# 创建数组
+nums=([2]=2 [0]=0 [1]=1)
+colors=(red yellow "dark blue")
+
+# 访问数组的单个元素
+echo ${nums[1]}
+# Output: 1
+
+# 访问数组的所有元素
+echo ${colors[*]}
+# Output: red yellow dark blue
+
+echo ${colors[@]}
+# Output: red yellow dark blue
+
+printf "+ %s\n" ${colors[*]}
+# Output:
+# + red
+# + yellow
+# + dark
+# + blue
+
+printf "+ %s\n" "${colors[*]}"
+# Output:
+# + red yellow dark blue
+
+printf "+ %s\n" "${colors[@]}"
+# Output:
+# + red
+# + yellow
+# + dark blue
+
+# 访问数组的部分元素
+echo ${nums[@]:0:2}
+# Output:
+# 0 1
+
+# 访问数组长度
+echo ${#nums[*]}
+# Output:
+# 3
+
+# 向数组中添加元素
+colors=(white "${colors[@]}" green black)
+echo ${colors[@]}
+# Output:
+# white red yellow dark blue green black
+
+# 从数组中删除元素
+unset nums[0]
+echo ${nums[@]}
+# Output:
+# 1 2