sysadmin

Installing Debian on Oracle Cloud Ampere Altra VMs

At the time of writing, Oracle Cloud have a highly generous ‘always free’ tier that includes 4 Ampere Altra vCPUs (the same ARM Neoverse N1 core used in Graviton 2), 24 GB RAM, 200GB block device, and 2x IPv4 addresses. It can be used to create one large VM or 4x small ones. The only available aarch64 templates are for Enterprise Linux distros (Oracle Linux or CentOS). However it is possible to convert a running VM from CentOS to Debian.
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Why not ZFS

ZFS is a hybrid filesystem and volume manager system that is quite popular recently but has some important and unexpected problems. It has many good features, which are probably why it is used: snapshots (with send/receive suppport), checksumming, RAID of some kind (with scrubbing support), deduplication, compression, and encryption. But ZFS also has a lot of downsides. It is not the only way to achieve those features on Linux, and there are better alternatives.
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iodine

By tunnelling network connections over DNS, you can get what amounts to free internet on certain networks, including (…) and most public wifi networks. Process: Find / host an iodine server to create a virtual lan over dns Connect to a proxy on the virtual lan Speeds: Iodine webpage cites 1 Mbit Confirmed 4-5 Mbit on (…) while (…) is connected. However dns traffic is just tcp/udp and is metered while you are connected Only 50kbit on (…) while (…) is disconnected Hosting iodine (…) is running an iodine server.
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StartSSL certificates

Must use IE. Log in to control panel and validate domain name via validations wizard. Certificates wizard: Web Server SSL/TLS certificate Copy encrypted private key –> ssl.key Add one subdomain (www.) Copy certificate –> ssl.crt Download root and server CA’s from this page Go to Toolbox, and decrypt the private key –> myserver.key Using with nginx Create myserver.crt by appending the following files; ssl.crt, sub.whatever.cer, root.cer listen 443 ssl; ssl on; ssl_certificate /path/to/myserver.
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Thumbnails on Windows 7

A few things are required to get media thumbnails (e.g. flv, mkv, ogm) working in Windows 7. 1. Shell Extension Register the thumbnailing shell extension for every filetype you want to generate thumbnails for, by making a new .reg file with the following contents: (This shell extension comes with Windows Media Player 12, so make sure that’s installed.) Windows Registry Editor Version 5.00 [HKEY_CLASSES_ROOT\.mkv\ShellEx\{BB2E617C-0920-11D1-9A0B-00C04FC2D6C1}] @="{c5a40261-cd64-4ccf-84cb-c394da41d590}" Run it. Then, rinse and repeat with .
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