I got this error message on the internal.server.host when forwarding an URL from an extrernal HTTP server to an internal HTTPS server: AH02032: Hostname internal.server.host provided via SNI and hostname external.server.host provided via HTTP are different The problem turned out to be that the internal server was trusting the external one’s X-Forwarded- headers, a feature […]
So the VM is using too much space, and the disk image needs to grow. Previously I used dd with a bunch of options to do this. However, the truncate tool makes the whole ordeal a lot easier. A simple command, such as the following, will grow the file disk.img by 10 gigabytes: truncate -s […]
Something completely unrelated to this blog thing, but I feel I have to put it somewhere. I recently did some mechanical work on an Aeon Cobra 50cc (AT70 in the registration) and spent a few evenings looking up information about it. The Aeon Cobra 50cc is sold in several Nordic countries as the GOES 50s. […]
After finding various useless references on how to use the MERGE statement in SQL Server 2008, I found this one that I could use, so I copied it here for personal reference: MERGE tablename AS target USING (VALUES (‘new value’, ‘different value’)) AS source (field1, field2) ON target.idfield = 7 WHEN MATCHED THEN UPDATE SET […]
An interesting situation occurs when you have a very limited range of public IP addresses and want to pass all traffic through a common gateway without “wasting” a public IP on that – you may find yourself wanting to use a gateway with a private IP even through your network uses public ones. So, in […]
To avoid holding up everything else when deleting massive amounts of data from an SQL Server table, you can use the TOP() function to delete the data in chunks. SELECT 1 WHILE @@ROWCOUNT > 0 BEGIN DELETE TOP(1000) FROM [dbo].[mytable] WHERE timestampUtc < ‘2015-05-29’ END The “SELECT 1” primes the @@ROWCOUNT variable, so the while […]
Upgrading a mail server from Debian Wheezy (7) to Debian Jessie (8), the following errors were observed in the mail.error log: dovecot: master: Error: systemd listens on port 143, but it’s not configured in Dovecot. Closing. dovecot: master: Error: systemd listens on port 993, but it’s not configured in Dovecot. Closing Looking for solutions, I […]
wlsetup-all-en_GB wlsetup-all-en_USSupport for Windows XP from Microsoft has long since ended, and although Windows Update still kind of works (you have to run the “Express” option a few times, and install Microsoft Update, before “Custom” works), attempts to install Windows Live Essentials fail miserably with the cryptic error message “OnCatalogResult: 0x80190194”. Downloading the installer manually […]
Quick reference on how to remove only the duplicate rows when attempting to add a unique index: WITH custom AS ( SELECT [projectId], [zoneId], [type], [name], RN = ROW_NUMBER() OVER (PARTITION BY [projectId], [zoneId], [type], [name] ORDER BY [projectId]) FROM [mydata].[dbo].[Properties] ) DELETE FROM custom WHERE RN > 1
I was recently asked for a way to do this, and since I figured more people might like to know, here’s how: Go to Tools => Web Developer => Developer Toolbar (check it), or simply press Shift+F2, then at the command line that appears in the bottom of the browser window, type “screenshot –fullpage” followed […]