diff --git a/content/post/mysql-install.md b/content/post/mysql-install.md
index abb6094..680019b 100644
--- a/content/post/mysql-install.md
+++ b/content/post/mysql-install.md
@@ -88,17 +88,17 @@ categories: ["database"]
 - 创建三个实例的目录
     ```bash
     cd ~
-    mkdir -p instance-{1..3}/{file,log}
+    mkdir -p instance-{3301..3303}/{file,log}
     ```
 
-- 创建各实例的配置文件 instance-{1..3}/my.cnf
+- 创建各实例的配置文件 instance-{3301..3303}/my.cnf
     ```bash
     cd ~
-    for i in {1..3}; do
+    for i in {3301..3303}; do
         cat > instance-$i/my.cnf <<-EOF
     [mysqld]
     mysqlx = OFF
-    port = 330$i
+    port = $i
     basedir = /home/mortal/mysql
     datadir = /home/mortal/instance-$i/db
     socket = /home/mortal/instance-$i/mysqld.sock
@@ -125,13 +125,13 @@ categories: ["database"]
     ```bash
     cd ~
     mysql/bin/mysqld \
-        --defaults-file=/home/mortal/instance-1/my.cnf \
+        --defaults-file=/home/mortal/instance-3301/my.cnf \
         --initialize-insecure
     mysql/bin/mysqld \
-        --defaults-file=/home/mortal/instance-2/my.cnf \
+        --defaults-file=/home/mortal/instance-3302/my.cnf \
         --initialize-insecure
     mysql/bin/mysqld \
-        --defaults-file=/home/mortal/instance-3/my.cnf \
+        --defaults-file=/home/mortal/instance-3303/my.cnf \
         --initialize-insecure
     ```
 
@@ -140,14 +140,14 @@ categories: ["database"]
     ```bash
     cd ~
     mysql/bin/mysqld_safe \
-        --defaults-file=/home/mortal/instance-1/my.cnf \
-        &>> instance-1/log/mysqld_safe.out
+        --defaults-file=/home/mortal/instance-3301/my.cnf \
+        &>> instance-3301/log/mysqld_safe.out
     mysql/bin/mysqld_safe \
-        --defaults-file=/home/mortal/instance-2/my.cnf \
-        &>> instance-2/log/mysqld_safe.out
+        --defaults-file=/home/mortal/instance-3302/my.cnf \
+        &>> instance-3302/log/mysqld_safe.out
     mysql/bin/mysqld_safe \
-        --defaults-file=/home/mortal/instance-3/my.cnf \
-        &>> instance-3/log/mysqld_safe.out
+        --defaults-file=/home/mortal/instance-3303/my.cnf \
+        &>> instance-3303/log/mysqld_safe.out
     ```
 
 ### 设置 root 密码
@@ -155,13 +155,13 @@ categories: ["database"]
     ```bash
     cd ~
     mysql/bin/mysqladmin \
-        --defaults-file=/home/mortal/instance-1/my.cnf \
+        --defaults-file=/home/mortal/instance-3301/my.cnf \
         password
     mysql/bin/mysqladmin \
-        --defaults-file=/home/mortal/instance-2/my.cnf \
+        --defaults-file=/home/mortal/instance-3302/my.cnf \
         password
     mysql/bin/mysqladmin \
-        --defaults-file=/home/mortal/instance-3/my.cnf \
+        --defaults-file=/home/mortal/instance-3303/my.cnf \
         password
     ```
 
@@ -170,15 +170,15 @@ categories: ["database"]
     ```bash
     cd ~
     mysql/bin/mysql \
-        --defaults-file=/home/mortal/instance-1/my.cnf \
+        --defaults-file=/home/mortal/instance-3301/my.cnf \
         -uroot \
         -p
     mysql/bin/mysql \
-        --defaults-file=/home/mortal/instance-2/my.cnf \
+        --defaults-file=/home/mortal/instance-3302/my.cnf \
         -uroot \
         -p
     mysql/bin/mysql \
-        --defaults-file=/home/mortal/instance-3/my.cnf \
+        --defaults-file=/home/mortal/instance-3303/my.cnf \
         -uroot \
         -p
     ```