Notes

I am one of those people who function better by writing things down. One day, I realized that most of my notes don’t have to be private, so here they are - my second brain. Be warned that, if you stumble upon something here that doesn’t make sense to you, it isn’t meant to!

Hardware transcoding inside an unprivileged LXC container on Proxmox

I usually run unprivileged LXC containers on Proxmox (as opposed to privileged ones). I did the following to make Jellyfin hardware transcoding work inside the container: cat > /etc/udev/rules.d/99-intel-chmod666.rules << 'EOF' KERNEL=="renderD128", MODE="0666" KERNEL=="card0", MODE="0666" EOF # Reboot Proxmox host once. Add the following to the /etc/pve/lxc/xyz.conf file: lxc.cgroup2.devices.allow: c 226:128 rwm lxc.cgroup2.devices.allow: c 29:0 rwm lxc.mount.entry: /dev/dri dev/dri none bind,optional,create=dir lxc.mount.entry: /dev/dri/renderD128 dev/renderD128 none bind,optional,create=file (Another resource that looked promising was this, which talks about some kind of user mapping from inside the container to Proxmox, but I found the above easier.)

Response to recruiters

Thanks so much for reaching out. I’m always interested in hearing about new and exciting opportunities out there. As a software engineer, I’m sure you can imagine that I get a very high volume of recruiters reaching out on LinkedIn. However, often times, incoming messages represent a poor fit and hoping on a call would be a waste of time for both parties. I would love to continue the conversation with you, but before I do, I’d like to level set around the level of seniority that you’re looking for. ...

Security freeze for minors

Experian In order for us to find out if Experian’s database contains credit information about your minor child, you will need to write to us with all of the following: Printed form with the information provided above A copy of your driver’s license or another government issued identification card, such as a state ID card Proof of your address, such as a copy of a bank statement, utility bill, insurance statement A copy of your child’s birth certificate Proof of guardianship, if not named on child’s birth certificate A copy of your child’s Social Security card Mail this form to: ...

Nextcloud resources

If I want to run some Nextcloud commands inside the Docker container, here’s how I can login from the host into the container with the right user privileges: docker exec -it -u 33 docker-nextcloud_app-1 bash Or, to run a command as root from outside: docker-compose exec nextcloud_app whoami Resources: Guide on how to run OCC commands inside the installation here. Some configs here are set through Docker environment variables and I found it difficult to tweak them after the first installation. Something to keep in mind. Docker documentation here.

Tailscale inside an unprivileged LXC container on Proxmox

Since I run LXC containers in unprivileged mode, I had to first run the following on Proxmox host. (Without it, Tailscale won’t install): chown 100000:100000 /dev/net/tun Here’s how my container config looks like on the host. root@pve:~# cat /etc/pve/lxc/100.conf # .. bunch of stuff # The following 2 is to allow Tailscale to run on the containers: lxc.cgroup2.devices.allow: c 10:200 rwm lxc.mount.entry: /dev/net/tun dev/net/tun none bind,create=file

Exiftool

Check Exif data on an image: ~/Image-ExifTool-12.40/exiftool -a -G1 -s -time:all filename The following command sorts by year, month, date and camera model name, in that order. Use -o . to move the data to some other directory. Without that, sorting happens in the directory specified at the end of the command (i.e. . below). The -Filename pseudo tag helps you rename the files. (I haven’t done that myself though.) ~/Image-ExifTool-12.40/exiftool -r -P \ '-Directory<$filemodifydate/Others' \ '-Directory<$createdate/Others' \ '-Directory<$datetimeoriginal/Others' \ '-Directory<$filemodifydate/${model;}' \ '-Directory<$createdate/${model;}' \ '-Directory<$datetimeoriginal/${model;}' \ -d '%Y/%m-%B/%d' . Resources: ...

Handle image duplicates

fdupes -rSm Pictures/ # Note: the following removes duplicates, so use with care! fdupes -rSdN Pictures/

OfflineIMAP

Here’s how I setup OfflineIMAP to take regular backups of our Gmail accounts: # Install, on Raspberry Pi. sudo apt install offlineimap3 cat > ~/.offlineimaprc << 'EOF' [general] accounts = foo1, foo2 [Account foo1] localrepository = foo1-local remoterepository = foo1-remote synclabels = yes # This header is where labels go. Usually you will be fine # with default value (X-Keywords), but in case you want it # different, here we go: labelsheader = X-Keywords [Repository foo1-remote] type = Gmail sslcacertfile = OS-DEFAULT remoteuser = foo.1@gmail.com remotepass = pass1 readonly = True [Repository foo1-local] type = GmailMaildir localfolders = /srv/dev-disk-by-uuid-28fd4901-c675-430d-be16-e1ffddc50727/Backups/Emails/foo.1@gmail.com [Account foo2] localrepository = foo2-local remoterepository = foo2-remote synclabels = yes # This header is where labels go. Usually you will be fine # with default value (X-Keywords), but in case you want it # different, here we go: labelsheader = X-Keywords [Repository foo2-remote] type = Gmail sslcacertfile = OS-DEFAULT remoteuser = foo.2@gmail.com remotepass = pass2 readonly = True [Repository foo2-local] type = GmailMaildir localfolders = /srv/dev-disk-by-uuid-28fd4901-c675-430d-be16-e1ffddc50727/Backups/Emails/foo.2@gmail.com EOF Other resources: ...

Pastebin

Here is my attempt to design a system for a pastebin-like service.

Got Your Backup - Backup Gmail

I use Got Your Back to backup my Gmail emails every night.: I stopped using GYB because the credentials it uses stop working after 7 days for regular Gmail accounts. I switched to OfflineIMAP instead. Here are some helpful commands: # Initial setup. ./bin/gyb/gyb \ --email foo@gmail.com \ --local-folder /srv/dev-disk-by-uuid-28fd4901-c675-430d-be16-e1ffddc50727/Backups/GYB-GMail-Backup/foo@gmail.com \ --action create-project # Quick way to test if everything is setup as expected. ./bin/gyb/gyb \ --email foo@gmail.com \ --local-folder /srv/dev-disk-by-uuid-28fd4901-c675-430d-be16-e1ffddc50727/Backups/GYB-GMail-Backup/foo@gmail.com \ --action estimate # Backup. Omit the last term to backup everything. # The last three parameters are optional to speed things up or make them run in less-memory environments. /home/pi/bin/gyb/gyb \ --email foo@gmail.com \ --local-folder /srv/dev-disk-by-uuid-28fd4901-c675-430d-be16-e1ffddc50727/Backups/GYB-GMail-Backup/foo@gmail.com \ --action backup \ --search "newer_than:7d" \ --memory-limit 100 \ --batch-size 4 Other tools that I checked but didn’t use: ...