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--- ubuntu_steps [2025/05/23 05:56] – kenson
+++ ubuntu_steps [2026/04/23 07:14] (current) – kenson
@@ Line 1: / Line 1: @@
 Start with "bare" ubuntu, I'm still on 22.04 LTS
-Just be root
+Notes:
 <code>
-sudo su -
+vi ~/.inputrc
+set enable-bracketed-paste off
 </code>
@@ Line 52: / Line 54: @@
 If you didn't config the machine as static but you want to
 <code>
-sudo mkdir -p /etc/cloud/cloud.cfg.d && \
+# detect current interface, IP/CIDR and gateway
-echo 'network: {config: disabled}' | sudo tee /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg && \
+iface=$(ip route show default | awk '/default/ {for(i=1;i<=NF;i++) if($i=="dev"){print $(i+1); exit}}')
+cidr=$(ip -o -4 addr show dev "$iface" | awk '{print $4}')
+gw=$(ip route show default | awk '/default/ {print $3}')
+# disable cloud-init network config
+sudo mkdir -p /etc/cloud/cloud.cfg.d \
+  && echo 'network: {config: disabled}' \
+      | sudo tee /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg >/dev/null
+# write your custom netplan
 sudo tee /etc/netplan/01-netcfg.yaml >/dev/null <<EOF
 network:
+  version: 2
+  renderer: networkd
   ethernets:
-    ens3f0:
+    $iface:
       dhcp4: false
       addresses:
-        - 10.10.22.181/24
+        - $cidr
-      gateway4: 10.10.22.1
+      routes:
+        - to: 0.0.0.0/0
+          via: $gw
       nameservers:
         addresses:
           - 8.8.8.8
           - 8.8.4.4
-  version: 2
 EOF
-sudo bash -c "echo '# This file has been disabled by custom configuration (/etc/netplan/01-netcfg.yaml).' > /etc/netplan/50-cloud-init.yaml"
-echo REMEMBER TO SET IP IN /etc/netplan/01-netcfg.yaml
+# disable the auto-generated cloud-init netplan
+sudo tee /etc/netplan/50-cloud-init.yaml >/dev/null <<EOF
+# disabled by custom config (/etc/netplan/01-netcfg.yaml)
+EOF
+echo "✔️  Netplan written for $iface ($cidr) via $gw"
 </code>
@@ Line 92: / Line 112: @@
 </code>
-Fix nvme bug and turn off audit and apparmor
+Fix nvme bug and turn off audit and app armor
 <code>
 sudo sed -i '/^\s*GRUB_CMDLINE_LINUX_DEFAULT=/d' /etc/default/grub && echo 'GRUB_CMDLINE_LINUX_DEFAULT="audit=0 pcie_aspm=off pcie_port_pm=off nvme_core.default_ps_max_latency_us=0 apparmor=0 security=apparmor"' | sudo tee -a /etc/default/grub && sudo update-grub
@@ Line 106: / Line 126: @@
 @reboot /usr/bin/python3 /root/hostinfoLCDbyid.py
 </code>
+AI
+Cuda 12.x uses ≥525
+<code>
+add-apt-repository ppa:graphics-drivers/ppa -y
+apt update
+</code>
+Check for latest recommended NVIDIA driver
+<code>
+ubuntu-drivers devices
+</code>
+Replace 575-open with the recommended, for certain 40 series and all 50 series use the open
+<code>
+apt install nvidia-driver-575-open -y
+</code>
+<code>
+reboot
+</code>
+Verify Installation
+<code>
+nvidia-smi
+</code>
+Add CUDA repo
+<code>
+# Ensure NVIDIA CUDA repo is added:
+sudo apt install software-properties-common
+distribution="ubuntu2204"
+wget https://developer.download.nvidia.com/compute/cuda/repos/$distribution/x86_64/cuda-keyring_1.1-1_all.deb
+sudo dpkg -i cuda-keyring_1.1-1_all.deb
+sudo apt update
+# List the latest CUDA toolkit packages available:
+apt-cache madison cuda-toolkit
+</code>
+Returns
+<code>
+cuda-toolkit |   12.9.0-1 | https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2204/x86_64  Packages
+cuda-toolkit |   12.8.1-1 | https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2204/x86_64  Packages
+cuda-toolkit |   12.8.0-1 | https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2204/x86_64  Packages
+cuda-toolkit |   12.6.3-1 | https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2204/x86_64  Packages
+cuda-toolkit |   12.6.2-1 | https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2204/x86_64  Packages
+cuda-toolkit |   12.6.1-1 | https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2204/x86_64  Packages
+</code>
+Install the latest toolkit
+<code>
+sudo apt install cuda-toolkit-12-9 -y
+</code>
+Set CUDA environment variables
+<code>
+echo 'export PATH=/usr/local/cuda/bin${PATH:+:${PATH}}' >> ~/.bashrc
+echo 'export LD_LIBRARY_PATH=/usr/local/cuda/lib64${LD_LIBRARY_PATH:+:${LD_LIBRARY_PATH}}' >> ~/.bashrc
+source ~/.bashrc
+</code>
+Verify CUDA
+<code>
+nvcc --version
+</code>
+<code>
+apt install nfs-common
+apt install nfs-kernel-server
+</code>
 <code>
@@ Line 142: / Line 239: @@
 apt install nmap
 </code>
+===== WiFi + “jerky typing” fix for low power wifi cards!!!! =====
+Run <code>ip addr</code> to find the wlan card, mine is wlp2s0.
+Test if this is the problem first.
+<code>
+iw dev wlan0 get power_save
+</code>
+if its on, it will report:
+<code>
+Power save: on
+</code>
+Turn off power save via:
+<code>
+sudo iw dev wlan0 set power_save off
+</code>
+If that works, make it permanent via (also note this isn't the "right" way, just the fastest way)
+<code>
+vi /etc/systemd/system/wifi-powersave-off.service
+</code>
+Add the following snippet
+<code>
+[Unit]
+Description=Disable WiFi Power Save
+After=network.target
+[Service]
+Type=oneshot
+ExecStart=/usr/sbin/iw dev wlp2s0 set power_save off
+[Install]
+WantedBy=multi-user.target
+</code>
+Make it permanent
+<code>
+sudo systemctl daemon-reexec
+sudo systemctl enable wifi-powersave-off
+sudo systemctl start wifi-powersave-off
+</code>