sealert: add page (#18456)

Co-authored-by: Dylan <[email protected]>

Author: pranlawate

pages/linux/sealert.md

@@ -0,0 +1,22 @@
+# sealert
+
+> Analyze and explain SELinux AVC denial messages.
+> Part of the `setroubleshoot-server` package.
+> See also: `audit2why`, `ausearch`, `audit2allow`.
+> More information: <https://manned.org/sealert>.
+
+- Analyze all recent SELinux denials:
+
+`sudo sealert {{[-a|--analyze]}} {{/var/log/audit/audit.log}}`
+
+- Analyze a specific alert ID from system logs:
+
+`sudo sealert {{[-l|--lookupid]}} {{alert_id}}`
+
+- Display a summary of recent SELinux alerts:
+
+`sudo sealert {{[-b|--browser]}}`
+
+- Monitor audit log in real-time for new alerts:
+
+`sudo tail {{[-f|--follow]}} {{/var/log/audit/audit.log}} | sealert {{[-l|--lookupid]}} -`