diff --git a/README.md b/README.md
index 3b8b5e7..062ac06 100644
--- a/README.md
+++ b/README.md
@@ -210,6 +210,7 @@ backup	/home/rulingcom		localhost/
 ```sh
 $ sudo vim /etc/logrotate.d/orbit # 內容見附註 logrotate
 $ sudo logrotate -d /etc/logrotate.conf # 確認系統是否有使用 /etc/logrotate.d/orbit
+$ sudo /usr/sbin/logrotate -f /etc/logrotate.conf #測試執行log壓縮程序，看是否能成功壓縮log
 ```
 
 ```txt
@@ -220,7 +221,7 @@ $ sudo logrotate -d /etc/logrotate.conf # 確認系統是否有使用 /etc/logro
   compress
   missingok
   notifempty
-  create 644 rulingcom rulingcom
+  copytruncate
   postrotate
     [ ! -f /run/nginx.pid ] || kill -USR1 `cat /run/nginx.pid`
   endscript
@@ -232,7 +233,7 @@ $ sudo logrotate -d /etc/logrotate.conf # 確認系統是否有使用 /etc/logro
   compress
   missingok
   notifempty
-  create 644 rulingcom rulingcom
+  copytruncate
   postrotate
     [ ! -f /run/nginx.pid ] || kill -USR1 `cat /run/nginx.pid`
   endscript
@@ -245,7 +246,7 @@ $ sudo logrotate -d /etc/logrotate.conf # 確認系統是否有使用 /etc/logro
   compress
   missingok
   notifempty
-  create 644 mongodb mongodb
+  copytruncate
   postrotate
     [ ! -f /var/lib/mongodb/mongod.lock ] || kill -SIGUSR1 `cat /var/lib/mongodb/mongod.lock`
   endscript
@@ -265,13 +266,10 @@ $ sudo vim /etc/rc.local #內容見附註 rc.local
 $ sudo chmod 755 /etc/rc.local
 $ update-rc.d rc.local defaults
 $ sudo systemctl start orbit
-$ sudo systemctl start rc.local
 $ sudo systemctl enable mongod.service #ubuntu18.04以上適用(可在系統boot時，自動開啟mongo)
-$ sudo mv /etc/init.d/mongod /etc/systemd/system/ && sudo systemctl enable mongod.service #如果sudo systemctl enable mongod.service失敗時
-$ sudo crontab -e #加入以下內容
-# @reboot /etc/init.d/orbit start
-# @reboot service mongod restart
-
+$ sudo mv /etc/init.d/mongod /etc/systemd/system/ && sudo systemctl enable mongod.service
+$ sudo crontab -e #加入以下#內容
+# @reboot /bin/bash -l -c "rm -f /tmp/mongodb-27017.sock && chown mongodb:mongodb /var/lib/mongodb/ -R && chown mongodb:mongodb /var/log/mongodb -R && /usr/sbin/service mongod restart && /etc/init.d/orbit restart"
 ```
 
 ```txt
@@ -553,13 +551,6 @@ case "$1" in
 esac
 ```
 
-```txt
-# 附註 rc.local
-#! /bin/sh
-sudo mongod --config /etc/mongod.conf &
-exit 0
-```
-
 ```
 
 ### 五、網路設定