It’s a chat network. As far as I’ve understood it, it’s like IRC, but Slack. Selfhosted, but also more like modern. It’s supposed to be safer, and in a way, kind of XMPP. It’s called Matrix. I will not explain why I decided to deploy it. Deploy it, learn it, use it or discart it. It’s a lifecycle of technology. So let’s just skip to it. It’s supposed to be self-hosted communications infrastructure that you can scale and so on. So let’s see, how do I set it up. ...
apt-get update apt-get install -y aptitude aptitude search '~i(!~ODebian)' # should return as little as possibile apt-get upgrade apt-get dist-upgrade dpkg -C # should return nothing or as little as possibile apt-mark showhold # should return nothing or as little as possibile dpkg --audit # should return nothing cp /etc/apt/sources.list /etc/apt/sources.list_backup sed -i 's/stretch/buster/g' /etc/apt/sources.list apt-get update apt list --upgradable apt-get upgrade -y apt-get dist-upgrade -y aptitude search '~i(!~ODebian)' # should return same as before apt-get autoremove or ...
So, after setting up Postfix/Dovecot e-mail server (more on that comming up later), I once came along to a situation where I had no mobile phone and I had to check mail. As usual, Gnome Display Manager crashed, and while I had no time to fix it, I also had no phone. I had to dig through my old mutt config (yes, I even had one) and fiddle with it, so I could read my email. ...
No DHCP server here! apt-get install dnsmasq pxelinux syslinux-common wget http://www.memtest.org/download/5.01/memtest86+-5.01.bin.gz gzip -dk memtest86+-5.01.bin.gz service dnsmasq stop mkdir -p /var/lib/tftpboot mkdir -p /var/lib/tftpboot/memtest cp ~/memtest86+-5.01.bin /var/lib/tftpboot/memtest/memtest86+-5.01 mkdir -p /var/lib/tftpboot/pxelinux.cfg vim /var/lib/tftpboot/pxelinux.cfg/default ------------BOF default memtest86 prompt 1 timeout 150 label memtest86 menu label Memtest86+ 5.01 kernel /memtest/memtest86+-5.01 ------------EOF ln -s /usr/lib/PXELINUX/pxelinux.0 /var/lib/tftpboot/ ln -s /usr/lib/syslinux/modules/bios/ldlinux.c32 /var/lib/tftpboot/ cp /etc/dnsmasq.conf /etc/dnsmasq.conf.bck echo "" > /etc/dnsmasq.conf vim /etc/dnsmasq.conf ------------BOF port=0 #no DHCP server log-dhcp # Enable DHCP logging dhcp-range=192.168.178.0,proxy #run as PXE only, no DHCP server dhcp-boot=pxelinux.0 #pxe boot file pxe-service=x86PC,"Network Boot",pxelinux # Provide network boot option called "Network Boot". enable-tftp tftp-root=/var/lib/tftpboot ------------EOF echo "DNSMASQ_EXCEPT=lo" >> /etc/default/dnsmasq service dnsmasq start Source ...
Power VM down virsh dumpxml $VM_NAME | grep 'mac address' virsh net-list virsh net-edit $NETWORK_NAME #(default?) <dhcp> <range start='192.168.122.100' end='192.168.122.254'/> <host mac='[MAC]' name='vm1' ip='192.168.122.xy'/> ... .. . </dhcp> virsh net-destroy $NETWORK_NAME virsh net-start $NETWORK_NAME Host reboot should be unnecessary… Source