diff --git a/chenkace/centos2anolis.log b/chenkace/centos2anolis.log
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+2023-08-03 15:11:03.364[INFO    ]: ====== Start ======
+2023-08-03 15:11:03.364[INFO    ]: Checking if the tool is executed by root user
+2023-08-03 15:11:03.365[INFO    ]: Checking system requirements.
+2023-08-03 15:11:03.366[WARNING ]: Upgrading system with readonly filesystem may be not supported, please check manually.
+2023-08-03 15:11:03.366[INFO    ]: Get current OS version.
+2023-08-03 15:11:03.507[INFO    ]: Version is 7.6
+2023-08-03 15:11:03.508[INFO    ]: Checking the version of Anolis OS
+2023-08-03 15:11:03.508[INFO    ]: Switch to Anolis OS 7.9
+2023-08-03 15:11:03.508[INFO    ]: Checking required packages
+2023-08-03 15:11:03.794[INFO    ]: Checking i686 packages
+2023-08-03 15:11:06.465[INFO    ]: Verify before
+2023-08-03 15:11:22.753[INFO    ]: Checking: distribution
+2023-08-03 15:11:22.819[INFO    ]: centos-release-7-6.1810.2.el7.centos.x86_64
+2023-08-03 15:11:22.820[INFO    ]: Checking: yum lock
+2023-08-03 15:11:22.822[INFO    ]: Checking: rpm database
+2023-08-03 15:11:22.922[INFO    ]: Checking network environment
+2023-08-03 15:11:23.127[ERROR   ]: <urlopen error [Errno -2] Name or service not known>
+2023-08-03 15:11:23.128[INFO    ]: Check dnf modules
+2023-08-03 15:11:23.129[INFO    ]: Looking for yumdownloader
+2023-08-03 15:11:23.160[INFO    ]: Checking mysql version
+2023-08-03 15:11:23.267[INFO    ]: Finding your repository directory
+2023-08-03 15:11:23.267[INFO    ]: Backing up and removing old repository files...
+2023-08-03 15:11:25.909[INFO    ]: Processing contentdir in repo files...
+2023-08-03 15:11:25.918[INFO    ]: Backing up and removing 3rd-part repository files...
+2023-08-03 15:11:26.048[INFO    ]: switch to anolis.repo
+2023-08-03 15:11:26.049[INFO    ]: Removing CentOS-specific yum configuration from /etc/yum.conf ...
+2023-08-03 15:11:26.051[INFO    ]: Downloading Anolis OS release package...
+2023-08-03 15:11:36.406[INFO    ]: Switching old release package with Anolis OS...
+2023-08-03 15:11:36.730[INFO    ]: optimise repofile
+2023-08-03 15:11:36.730[INFO    ]: Installing base packages for Anolis OS...
+2023-08-03 15:13:19.140[INFO    ]: Updating initrd...
+2023-08-03 15:14:11.959[INFO    ]: process pkgs for c7
+2023-08-03 15:15:51.080[INFO    ]: Switch successful. Syncing with Anolis OS repositories.
+2023-08-03 15:15:51.092[INFO    ]: Distro sync
+2023-08-03 15:28:32.791[INFO    ]: ====== Start ======
+2023-08-03 15:28:32.791[INFO    ]: Checking if the tool is executed by root user
+2023-08-03 15:28:32.791[INFO    ]: Checking system requirements.
+2023-08-03 15:28:32.792[WARNING ]: Upgrading system with readonly filesystem may be not supported, please check manually.
+2023-08-03 15:28:32.792[INFO    ]: Get current OS version.
+2023-08-03 15:28:32.818[INFO    ]: Version is 7.9
+2023-08-03 15:28:32.819[INFO    ]: Checking the version of Anolis OS
+2023-08-03 15:28:32.819[INFO    ]: Switch to Anolis OS 7.9
+2023-08-03 15:28:32.820[INFO    ]: Checking required packages
+2023-08-03 15:28:32.902[INFO    ]: Checking i686 packages
+2023-08-03 15:28:36.430[INFO    ]: Verify before
+2023-08-03 15:28:37.956[INFO    ]: Checking: distribution
+2023-08-03 15:28:38.134[INFO    ]: anolis-release-7.9-1.an7.x86_64
+2023-08-03 15:28:38.136[ERROR   ]: You are already using Anolis OS.