diff --git a/ubuntu.md b/ubuntu.md
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--- a/ubuntu.md
+++ b/ubuntu.md
@@ -1 +1,7 @@
-Wikiへようこそ。
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+## ubuntuの遅延
+
+遅延の解消法です。
+
+```sh
+$ sudo chmod -x /etc/update-motd.d/{00-header,10-help-text,50-landscape-sysinfo,50-motd-news,85-fwupd,90-updates-available,91-contract-ua-esm-status,91-release-upgrade,92-unattended-upgrades,95-hwe-eol,97-overlayroot}
+```
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