diff --git a/SysadminTips.page b/SysadminTips.page
index 7331997..a30c4bc 100644
--- a/SysadminTips.page
+++ b/SysadminTips.page
@@ -1,3 +1,9 @@
+Show custom certs (not a link) and expiration in `/etc/ssl/certs`.
+
+```
+find /etc/ssl/certs/ -type f -print -exec openssl x509 -text -in {} \; | grep --color=auto -e etc -e CN= -e After;
+```
+
 Edit Bind DNS serial (needs modifications, not generic).
 
 ```