diff --git a/.github/workflows/link-fail-fast.yaml b/.github/workflows/link-fail-fast.yaml
index a5e4677d08972..04ac603a65fe2 100644
--- a/.github/workflows/link-fail-fast.yaml
+++ b/.github/workflows/link-fail-fast.yaml
@@ -17,10 +17,6 @@ jobs:
           CHANGED_FILES=$(git diff-tree --name-only --diff-filter 'AM' -r HEAD^1 HEAD -- "*.md" | sed -z "s/\n$//;s/\n/' '/g")
           echo "all_changed_files=${CHANGED_FILES}" >> $GITHUB_OUTPUT
 
-      - name: Download Exclude Path
-        run: |
-          curl https://raw.githubusercontent.com/pingcap/docs/master/.lycheeignore -O
-
       - name: Link Checker
         if: ${{ steps.changed-files.outputs.all_changed_files }}
         uses: lycheeverse/lychee-action@v1.6.1
diff --git a/.lycheeignore b/.lycheeignore
index 3ead57f29a342..ce919d2c77c0f 100644
--- a/.lycheeignore
+++ b/.lycheeignore
@@ -14,4 +14,5 @@ file://.*?http:/\$%7BPD_IP%7D:\$%7BPD_PORT%7D/dashboard.*
 http://\{grafana-ip\}:3000
 http://\{pd-ip\}:2379/dashboard
 http://localhost:\d+/
-https://github\.com/\$user/(docs|docs-cn)
\ No newline at end of file
+https://github\.com/\$user/(docs|docs-cn)
+https://linux.die.net/man.*
diff --git a/check-before-deployment.md b/check-before-deployment.md
index a5ac8189e893d..03b2320d2cc6f 100644
--- a/check-before-deployment.md
+++ b/check-before-deployment.md
@@ -789,4 +789,8 @@ sudo yum -y install numactl
 
 ## Disable SELinux
 
-Use the [getenforce(8)](https://linux.die.net/man/8/getenforce) utility to check if SELinux is disabled or set to permissive. SELinux in enforcing mode can cause deployment failures. For instructions on disabling SELinux, refer to your operating system's documentation.
+SELinux must be disabled or set to permissive mode. To check the current status, use the [getenforce(8)](https://linux.die.net/man/8/getenforce) utility.
+
+If SELinux is not disabled, open the `/etc/selinux/config` file, locate the line starting with `SELINUX=`, and change it to `SELINUX=disabled`. After making this change, you need to reboot the system because switching from `enforcing` or `permissive` to `disabled` does not take effect without a reboot.
+
+On some systems (such as Ubuntu), the `/etc/selinux/config` file might not exist, and the getenforce utility might not be installed. In that case, you can skip this step.
diff --git a/tiup/tiup-component-cluster-check.md b/tiup/tiup-component-cluster-check.md
index 02f557ce0d1c1..2e659b6fc61e2 100644
--- a/tiup/tiup-component-cluster-check.md
+++ b/tiup/tiup-component-cluster-check.md
@@ -66,7 +66,11 @@ Check the limit values in the `/etc/security/limits.conf` file:
 
 ### SELinux
 
-Check whether SELinux is enabled. It is required to disable SELinux.
+SELinux must be disabled or set to permissive mode. To check the current status, use the [getenforce(8)](https://linux.die.net/man/8/getenforce) utility.
+
+If SELinux is not disabled, open the `/etc/selinux/config` file, locate the line starting with `SELINUX=`, and change it to `SELINUX=disabled`. After making this change, you need to reboot the system because switching from `enforcing` or `permissive` to `disabled` does not take effect without a reboot.
+
+On some systems (such as Ubuntu), the `/etc/selinux/config` file might not exist, and the getenforce utility might not be installed. In that case, you can skip this step.
 
 ### Firewall