Filter mailing lists with Dovecot Sieve

require ["fileinto", "variables"];

if header :matches "List-Post" "*<mailto:**@*.*.*>" {
  fileinto "INBOX.lists.${5}.${3}"; stop;
}

if header :matches "List-Post" "*<mailto:**@*.*>" {
  fileinto "INBOX.lists.${4}.${3}"; stop;
}

if header :matches "X-Mailing-List" "*@*.*.*" {
  fileinto "INBOX.lists.${3}.${1}"; stop;
}

if header :matches "X-Mailing-List" "*@*.*" {
  fileinto "INBOX.lists.${2}.${1}"; stop;
}

Teamspeak Dockerfile > Healthcheck

FROM teamspeak

RUN apk --update --no-cache add netcat-openbsd

HEALTHCHECK --interval=15s --timeout=1s --start-period=5s --retries=3 CMD echo quit | nc 127.0.0.1 10011 || false
# docker ps --filter ancestor=teamspeak

CONTAINER ID        IMAGE                 COMMAND                  CREATED             STATUS                 PORTS                                                                        NAMES
748e7f873a07        teamspeak_teamspeak   "entrypoint.sh ts3se…"   5 hours ago         Up 5 hours (healthy)   0.0.0.0:10011->10011/tcp, 0.0.0.0:9987->9987/udp, 0.0.0.0:30033->30033/tcp   dvaec_teamspeak

Steps to (maybe) fix hardware graphics acceleration

Command to verify hardware acceleration (only works inside xorg session):

Positive example:

$ glxinfo | grep render

direct rendering: Yes
    GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, 
    GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, 
Extended renderer info (GLX_MESA_query_renderer):
OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 530 (Skylake GT2) 
    GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth, 
    GL_NV_conditional_render, GL_NV_depth_clamp, GL_NV_packed_depth_stencil, 
    GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth, 
    GL_MESA_window_pos, GL_NV_blend_square, GL_NV_conditional_render, 
    GL_OES_element_index_uint, GL_OES_fbo_render_mipmap,

Negative example (llvmpipe (LLVM 6.0, 256 bits) means it’s using software rendering):

$ glxinfo | grep render

direct rendering: Yes
    GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer,
    GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer,
Extended renderer info (GLX_MESA_query_renderer):
OpenGL renderer string: llvmpipe (LLVM 6.0, 256 bits)
    GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth,
    GL_NV_conditional_render, GL_NV_depth_clamp, GL_NV_packed_depth_stencil,
    GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth,
    GL_NV_blend_square, GL_NV_conditional_render, GL_NV_depth_clamp,
    GL_OES_element_index_uint, GL_OES_fbo_render_mipmap,

Session type:

$ loginctl show-session c2 -p Type
Type=x11

Make sure these are installed:

linux-modules
linux-modules-extra
libegl1-mesa
libgl1-mesa-dri
libgl1-mesa-dri
libgl1-mesa-glx
libglapi-mesa
libgles2-mesa
libglu1-mesa
libwayland-egl1-mesa
mesa-utils
mesa-vdpau-drivers

Kernel versions working:

4.10.0-33-generic
4.15.0-15-generic

Linux specific packages:

dpkg -l | awk '{ print $2 }' | grep ^linux
linux-base
linux-firmware
linux-headers-4.15.0-15
linux-headers-4.15.0-15-generic
linux-modules-4.15.0-15
linux-modules-extra-4.15.0-15 linux-image-4.15.0-15-generic linux-image-extra-4.15.0-15-generic linux-libc-dev:amd64 linux-sound-base
apt install linux-headers-generic linux-generic

Configuring IPv6 with netplan on OVH Public Cloud

# This file is generated from information provided by
# the datasource.  Changes to it will not persist across an instance.
# To disable cloud-init's network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
    version: 2
    ethernets:
        ens3:
            dhcp4: true
            addresses:
                    - YOUR:IPv6:ADDRESS/64
            gateway6: YOUR:IPv6:Gateway
            match:
                macaddress: MAC:ADDRESS:OF:YOUR:INSTANCE
            set-name: ens3

Then run

netplan apply