README.md: Add steps for Ubuntu developer workflow

README.md

@@ -72,8 +72,17 @@ docker build -t kmake-image .
 ```
 
 ### 2. Setup the aliases in your .bashrc
+
+Explicitly add a uid:gid entry in a file a pass it with docker start command.
 ```
-alias kmake-image-run='docker run -it --rm --user $(id -u):$(id -g) --workdir="$PWD" -v "$(dirname $PWD)":"$(dirname $PWD)" kmake-image'
+cd kernel
+#Make sure you are in the kernel source directory before giving below commands
+passwd_b4=$(mktemp)
+echo "user:x:$(id -u):$(id -g):User:/:/bin/bash" > "$passwd_b4"
+```
+
+```
+alias kmake-image-run='docker run -it --rm --user $(id -u):$(id -g) --workdir="$PWD" -v "$passwd_b4":/etc/passwd:ro -v "$(dirname $PWD)":"$(dirname $PWD)" kmake-image'
 alias kmake='kmake-image-run make'
 ```
 
@@ -165,6 +174,14 @@ fastboot reboot bootloader
 fastboot boot images/boot.img
 ```
 
+### 10. Or Build Ubuntu Kernel deb packages
+
+```
+  kmake mrproper O=../debian
+  kmake defconfig O=../debian
+  kmake -j16 O=../debian bindeb-pkg
+```
+
 ## Finer Details
 
 ### kmake-image-run
@@ -268,5 +285,84 @@ kmake-image-run mkbootimg \
         --output boot.img
 ```
 
+### Install kernel deb packages
+
+Kernel deb packages can be built using
+https://github.com/qualcomm-linux/kmake-image?tab=readme-ov-file#10-Or-Build-Ubuntu-Kernel-deb-packages
+
+The linux-image-<kernel_ver>_arm64.deb contains kernel image and modules.
+Copy the deb package to the device. Either, via copying it to system.img
+or adb push command or via some Ethernet/WIFI/NW interface. Once the package
+is on device and the device is booted, install the deb package on device
+using "dpkg -i" to install the kernel image and the modules on the device
+and reboot the device. Below are examples of how this can be achieved.
+
+Build Ubuntu Kernel deb packages
+https://github.com/qualcomm-linux/kmake-image?tab=readme-ov-file#10-Or-Build-Ubuntu-Kernel-deb-packages
+
+#### Method 1: Mount and flash via system image:
+
+ 1. Copy the system.img from the flat META to your linux machine.
+ 2. mount the system.img and copy kernel deb package to it.
+```
+ mkdir ./temp
+ sudo mount system.img ./temp
+ sudo cp /<path>/linux-image-6.17.0-rc7-dbg_6.17.0~rc7-7_arm64.deb ./temp
+ sudo umount ./temp
+```
+
+ 3. Put the device in fastboot mode and flash system.img OR copy the updated system.img
+    as a flat META and flash device via image downloader tool.
+```
+ fastboot flash system system.img
+ fastboot reboot
+```
+ 4. Once device is booted, run below commands on device to install kernel and modules.
+```
+ dpkg -i /linux-image-6.17.0-rc7-dbg_6.17.0~rc7-7_arm64.deb
+ reboot
+```
+#After reboot your kernel will be booted on device.
+
+#### Method 2: Use Ubuntu distro daily image:
+ 1. Build a ubuntu.img using below steps using ubuntu daily image:
+    https://github.com/qualcomm-linux/qcom-build-utils/tree/latest
+
+ 2. Once built, you get ubuntu.img and espefi.bin.
+    Copy ubuntu.img and espefi.bin back to the flat META. Rename them as system.img
+    and efi.bin respectivly.
+
+ 3. Flash the above flat META to boot your device.
+
+ 4. mount the ubuntu.img and copy kernel deb package to it:
+```
+ mkdir ./temp
+ sudo mount ubuntu.img ./temp
+ sudo cp /<path>/linux-image-6.17.0-rc7-dbg_6.17.0~rc7-7_arm64.deb ./temp
+ sudo umount ./temp
+```
+ 5. Put the device in fastboot mode and flash ubuntu.img:
+```
+ fastboot flash system ubuntu.img
+ fastboot reboot
+```
+
+ 6. Once device is booted, run below commands on device to install kernel and modules.
+```
+ dpkg -i /linux-image-6.17.0-rc7-dbg_6.17.0~rc7-7_arm64.deb
+ reboot
+```
+#After reboot your kernel will be booted on device.
+
+#### Method 3: You have a booted ubuntu distro with adb or internet(via WIFI or Ethernet)
+
+ 1. Once device is booted, copy the deb package to the booted deivce via N/W or adb.
+ Run below commands on device to install kernel and modules.
+```
+ dpkg -i /linux-image-6.17.0-rc7-dbg_6.17.0~rc7-7_arm64.deb
+ reboot
+```
+ #After reboot your kernel will be booted on device.
+
 ## License
 kmake-image is licensed under the [*BSD-3-clause-clear License*](https://spdx.org/licenses/BSD-3-Clause-Clear.html). See [*LICENSE*](https://github.com/qualcomm-linux/kmake-image/blob/main/LICENSE) for the full license text.