initial

joplin notion extension/linux/unattended install of ubuntu server.md

@@ -0,0 +1,61 @@
+unattended install of ubuntu server
+Video reference
+https://www.youtube.com/watch?v=DtXZ6BMaKbA
+https://files.catbox.moe/fztpyo.mp4
+
+-  Download iso from here:  https://cdimage.ubuntu.com/releases/18.04.6/release/
+-  Copy autoinstall-user-data file from `/var/log/installer` from where ubuntu-live-server-23.... .iso is installed. Then create a directory say 'server_work'. Under it create a autoinstall-user-data and copy necessary things like
+    ```
+	#cloud-config
+	autoinstall:
+	  identity:
+		hostname: tree
+		password: $6$oylcLD1tDk6UPHJf$xSwvFGR8314IlJBENXKKqAGbcHWuzPp7le3HRAzaSPg7I2vJk.pFEnMICyPOQwjJGjaPqejSEkPcyaG9T7kRW.
+		realname: tree
+		username: tree
+	  kernel:
+		package: linux-generic
+	  keyboard:
+		layout: us
+		toggle: null
+		variant: ''
+	  locale: en_US.UTF-8
+	  ssh:
+		allow-pw: true
+		authorized-keys: []
+		install-server: true
+	  updates: security
+	  version: 1
+	  shutdown: poweroff
+
+	```
+- Now create directory 'source-files' and use this 
+   `xorriso -osirrox on -indev ubuntu-23.10-live-server-amd64.iso --extract_boot_images source-files/bootpart -extract / source-files/
+`
+- Now go to source-files dir and create dir nocloud and go to nocloud and use
+  `cp ../../autoinstall-user-data user-data`. Now create file named meta-data. Finally go to parent dir ie source-files. 
+- Now go to boot/grub and add write permission for root for file grub.cfg using `chmod 644 grub.cfg`
+-  Open  grub.cfg. Create menuentry for automatic install like this
+   After the line `set menu_color_highlight=black/light-gray` add this
+	  ```
+	  menuentry "Autoinstall Ubuntu Server" {
+			set gfxpayload=keep
+			linux /casper/vmlinuz quiet autoinstall ds=nocloud\;s=/cdrom/nocloud/ ---
+			initrd /casper/initrd
+	}
+
+	  ```
+   and set timeout=5 instead of 30
+ -  Go to source files directory. Now use this 
+   `xorriso -as mkisofs -r -V "ubuntu-autoinstall" -J -boot-load-size 4 -boot-info-table -input-charset utf-8 -eltorito-alt-boot -b bootpart/eltorito_img1_bios.img -no-emul-boot -o ../installer.iso .`
+
+
+- ssh
+  `sudo nano /etc/ssh/sshd_config` 
+  Change port if desired
+  
+  `ssh username@ip_address -p 22`  . here ip_address can be local or public. 22 is default port
+  When port forwarding externally, using pyblic ip address make sure to have some firewall like `fail2ban` or `ufw`
+  In order to use GUI locally when opening through ssh. 
+  for eg: opening gui in A if remote machine is B.
+  `ssh -X userB@ip_address -p $DEFAULT_PORT`