#2 95-hwe-eol / update-motd-hwe-eol
Sadly this already does some caching in update-motd-hwe-eol by checking
if the last of these checks is older than an update to the source lists.
But to do so it has already executed the - relatively - rather expensive
apt-config calls.
Since it comes down to checking new sources.lists there is no need to
update this more often than once every few minutes or hours. Could be
even slower without loosing most of its value, but we already achieve
most of what we need with a delay of ~1h.
We started with:
5.37% apt-config
Now:
-- no more present
--- orig/95-hwe-eol 2022-03-30 07:53:18.396529018 +0000
+++ /etc/update-motd.d/95-hwe-eol 2022-03-30 09:13:16.160985148 +0000
@@ -1,5 +1,11 @@
#!/bin/sh
+# this stamp is created and updated by
/usr/lib/update-notifier/update-motd-hwe-eol
+stamp="/var/lib/update-notifier/hwe-eol"
+
+# do not try to refresh this more than once per hour
+find $stamp -newermt 'now-1 hours' 2> /dev/null | grep -m 1 '.' && exit 0
+
if [ -x /usr/lib/update-notifier/update-motd-hwe-eol ]; then
exec /usr/lib/update-notifier/update-motd-hwe-eol
fi
No big need left to reduce the apt-config usage in update-motd-hwe-eol after
this change.
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https://bugs.launchpad.net/bugs/1893716
Title:
scripts in /etc/update-motd.d/ run even on login via non-interactive
scp and sftp sessions
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