diff --git a/src/docs/centos/sshd_config b/src/docs/centos/sshd_config
index 713ea7a..d92645c 100644
--- a/src/docs/centos/sshd_config
+++ b/src/docs/centos/sshd_config
@@ -12,7 +12,7 @@
 # SELinux about this change.
 # semanage port -a -t ssh_port_t -p tcp #PORTNUMBER
 #
-Port 2223
+Port 2228
 #AddressFamily any
 #ListenAddress 0.0.0.0
 #ListenAddress ::
diff --git a/src/docs/erlang/编译安装与简单安装.md b/src/docs/erlang/编译安装与简单安装.md
index dc18e48..053d7ed 100644
--- a/src/docs/erlang/编译安装与简单安装.md
+++ b/src/docs/erlang/编译安装与简单安装.md
@@ -41,6 +41,8 @@
         3.2 使用rpm 安装 rpm -ivh jdk-7u1-linux-i586.rpm 
         yum -y install ncurses-devel unixODBC-devel openssl-devel  gcc gcc-c++ autoconf automake libxslt gtk3-devel.x86_64 
         
+        (如果有些linux 系统 找不到 unixODBC-devel 就去 https://www.unixodbc.org/ 下载源码编译安装)
+
         ./otp_build autoconf
         运行configure配置 
         ./configure --prefix=/usr/local/erlang  --with-ssl  -enable-threads -enable-smmp-support -enable-kernel-poll  --without-javac