Cant flash xavier AGX

when i want flash xavier AGX ,i have this problem.
sdkmanager cant download needed file .

15:41:42 INFO: VPI on Host - host: verifying checksum of /home/maryam/Downloads/nvidia/sdkm_downloads/vpi-lib-2.1.6-cuda11-x86_64-linux.deb
15:41:43 INFO: VPI on Host - host: download /home/maryam/Downloads/nvidia/sdkm_downloads/vpi-lib-2.1.6-cuda11-x86_64-linux.deb successfully, checksum is correct
15:41:43 INFO: VPI on Host - host: verifying checksum of /home/maryam/Downloads/nvidia/sdkm_downloads/vpi-dev-2.1.6-cuda11-x86_64-linux.deb
15:41:43 INFO: VPI on Host - host: Found file /home/maryam/Downloads/nvidia/sdkm_downloads/vpi-dev-2.1.6-cuda11-x86_64-linux.deb with correct checksum, skip downloading.
15:41:43 INFO: VPI on Host - host: verifying checksum of /home/maryam/Downloads/nvidia/sdkm_downloads/vpi-cross-aarch64-l4t-2.1.6-cuda11-x86_64-linux.deb
15:41:43 INFO: VPI on Host - host: Found file /home/maryam/Downloads/nvidia/sdkm_downloads/vpi-cross-aarch64-l4t-2.1.6-cuda11-x86_64-linux.deb with correct checksum, skip downloading.
15:41:43 INFO: VPI on Host - host: verifying checksum of /home/maryam/Downloads/nvidia/sdkm_downloads/vpi-python3.8-2.1.6-cuda11-x86_64-linux.deb
15:41:43 INFO: VPI on Host - host: Found file /home/maryam/Downloads/nvidia/sdkm_downloads/vpi-python3.8-2.1.6-cuda11-x86_64-linux.deb with correct checksum, skip downloading.
15:41:43 INFO: VPI on Host - host: verifying checksum of /home/maryam/Downloads/nvidia/sdkm_downloads/vpi-python3.9-2.1.6-cuda11-x86_64-linux.deb
15:41:43 INFO: VPI on Host - host: Found file /home/maryam/Downloads/nvidia/sdkm_downloads/vpi-python3.9-2.1.6-cuda11-x86_64-linux.deb with correct checksum, skip downloading.
15:41:43 INFO: VPI on Host - host: verifying checksum of /home/maryam/Downloads/nvidia/sdkm_downloads/vpi-samples-2.1.6-cuda11-x86_64-linux.deb
15:41:43 INFO: VPI on Host - host: Found file /home/maryam/Downloads/nvidia/sdkm_downloads/vpi-samples-2.1.6-cuda11-x86_64-linux.deb with correct checksum, skip downloading.
15:41:43 INFO: VPI on Host - host: start to download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/vpi-demos-2.1.6-cuda11-x86_64-linux-ubuntu2004.deb to /home/maryam/Downloads/nvidia/sdkm_downloads/vpi-demos-2.1.6-cuda11-x86_64-linux-ubuntu2004.deb
15:41:47 ERROR: File System and OS - target_image: Download request timed out after 60 seconds. Closing connections
15:41:47 : File System and OS - target_image: download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/T194/Tegra_Linux_Sample-Root-Filesystem_R35.1.0_aarch64.tbz2 failed, retrying 2…
15:41:48 INFO: File System and OS - target_image: start to download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/T194/Tegra_Linux_Sample-Root-Filesystem_R35.1.0_aarch64.tbz2 to /home/maryam/Downloads/nvidia/sdkm_downloads/Tegra_Linux_Sample-Root-Filesystem_R35.1.0_aarch64.tbz2
15:43:47 ERROR: CUDA on Host - host: Download request timed out after 60 seconds. Closing connections
15:43:47 : CUDA on Host - host: download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/cuda-repo-ubuntu2004-11-4-local_11.4.14-470.131-1_amd64.deb failed, retrying 2…
15:43:47 ERROR: Drivers for Jetson - target_image: Download request timed out after 60 seconds. Closing connections
15:43:47 : Drivers for Jetson - target_image: download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/T194/Jetson_Linux_R35.1.0_aarch64.tbz2 failed, retrying 3…
15:43:48 INFO: CUDA on Host - host: start to download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/cuda-repo-ubuntu2004-11-4-local_11.4.14-470.131-1_amd64.deb to /home/maryam/Downloads/nvidia/sdkm_downloads/cuda-repo-ubuntu2004-11-4-local_11.4.14-470.131-1_amd64.deb
15:43:48 INFO: Drivers for Jetson - target_image: start to download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/T194/Jetson_Linux_R35.1.0_aarch64.tbz2 to /home/maryam/Downloads/nvidia/sdkm_downloads/Jetson_Linux_R35.1.0_aarch64.tbz2
15:43:54 ERROR: VPI on Host - host: Download request timed out after 60 seconds. Closing connections
15:43:54 : VPI on Host - host: download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/vpi-demos-2.1.6-cuda11-x86_64-linux-ubuntu2004.deb failed, retrying 1…
15:43:55 INFO: VPI on Host - host: start to download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/vpi-demos-2.1.6-cuda11-x86_64-linux-ubuntu2004.deb to /home/maryam/Downloads/nvidia/sdkm_downloads/vpi-demos-2.1.6-cuda11-x86_64-linux-ubuntu2004.deb
15:43:57 ERROR: CUDA Toolkit for L4T - target: Download request timed out after 60 seconds. Closing connections
15:43:57 : CUDA Toolkit for L4T - target: download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/cuda-repo-l4t-11-4-local_11.4.14-1_arm64.deb failed, retrying 1…
15:43:58 ERROR: CUDA on Host - host: DevZone get download url failed: RequestError: getaddrinfo EAI_AGAIN developer.nvidia.com .
15:43:58 : CUDA on Host - host: download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/cuda-repo-ubuntu2004-11-4-local_11.4.14-470.131-1_amd64.deb failed, retrying 3…
15:43:58 ERROR: Drivers for Jetson - target_image: DevZone get download url failed: RequestError: getaddrinfo EAI_AGAIN developer.nvidia.com .
15:43:58 : Drivers for Jetson - target_image: download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/T194/Jetson_Linux_R35.1.0_aarch64.tbz2 failed, retrying 4…
15:43:58 INFO: CUDA Cross Compile Package on Host - host: start to download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/cuda-repo-cross-aarch64-ubuntu2004-11-4-local_11.4.14-1_all.deb to /home/maryam/Downloads/nvidia/sdkm_downloads/cuda-repo-cross-aarch64-ubuntu2004-11-4-local_11.4.14-1_all.deb
15:43:58 INFO: CUDA on Host - host: start to download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/cuda-repo-ubuntu2004-11-4-local_11.4.14-470.131-1_amd64.deb to /home/maryam/Downloads/nvidia/sdkm_downloads/cuda-repo-ubuntu2004-11-4-local_11.4.14-470.131-1_amd64.deb
15:43:58 INFO: CUDA Toolkit for L4T - target: start to download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/cuda-repo-l4t-11-4-local_11.4.14-1_arm64.deb to /home/maryam/Downloads/nvidia/sdkm_downloads/cuda-repo-l4t-11-4-local_11.4.14-1_arm64.deb
15:43:58 INFO: Drivers for Jetson - target_image: start to download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/T194/Jetson_Linux_R35.1.0_aarch64.tbz2 to /home/maryam/Downloads/nvidia/sdkm_downloads/Jetson_Linux_R35.1.0_aarch64.tbz2
15:44:03 ERROR: File System and OS - target_image: Download request timed out after 60 seconds. Closing connections
15:44:03 : File System and OS - target_image: download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/T194/Tegra_Linux_Sample-Root-Filesystem_R35.1.0_aarch64.tbz2 failed, retrying 3…
15:44:04 INFO: File System and OS - target_image: start to download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/T194/Tegra_Linux_Sample-Root-Filesystem_R35.1.0_aarch64.tbz2 to /home/maryam/Downloads/nvidia/sdkm_downloads/Tegra_Linux_Sample-Root-Filesystem_R35.1.0_aarch64.tbz2
15:44:23 ERROR: File System and OS - target_image: DevZone get download url failed: RequestError: getaddrinfo EAI_AGAIN developer.nvidia.com .
15:44:24 : File System and OS - target_image: download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/T194/Tegra_Linux_Sample-Root-Filesystem_R35.1.0_aarch64.tbz2 failed, retrying 4…
15:44:24 INFO: File System and OS - target_image: start to download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/T194/Tegra_Linux_Sample-Root-Filesystem_R35.1.0_aarch64.tbz2 to /home/maryam/Downloads/nvidia/sdkm_downloads/Tegra_Linux_Sample-Root-Filesystem_R35.1.0_aarch64.tbz2
15:46:04 ERROR: CUDA Cross Compile Package on Host - host: Download request timed out after 60 seconds. Closing connections
15:46:04 : CUDA Cross Compile Package on Host - host: download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/cuda-repo-cross-aarch64-ubuntu2004-11-4-local_11.4.14-1_all.deb failed, retrying 2…
15:46:05 INFO: CUDA Cross Compile Package on Host - host: start to download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/cuda-repo-cross-aarch64-ubuntu2004-11-4-local_11.4.14-1_all.deb to /home/maryam/Downloads/nvidia/sdkm_downloads/cuda-repo-cross-aarch64-ubuntu2004-11-4-local_11.4.14-1_all.deb
15:46:06 ERROR: VPI on Host - host: Download request timed out after 60 seconds. Closing connections
15:46:06 : VPI on Host - host: download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/vpi-demos-2.1.6-cuda11-x86_64-linux-ubuntu2004.deb failed, retrying 2…
15:46:07 INFO: VPI on Host - host: start to download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/vpi-demos-2.1.6-cuda11-x86_64-linux-ubuntu2004.deb to /home/maryam/Downloads/nvidia/sdkm_downloads/vpi-demos-2.1.6-cuda11-x86_64-linux-ubuntu2004.deb
15:52:11 ERROR: CUDA Cross Compile Package on Host - host: Download request timed out after 60 seconds. Closing connections
15:52:11 : CUDA Cross Compile Package on Host - host: download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/cuda-repo-cross-aarch64-ubuntu2004-11-4-local_11.4.14-1_all.deb failed, retrying 3…
15:52:12 INFO: CUDA Cross Compile Package on Host - host: start to download https://developer.nvidia.com/assets/embedded/secure/tools/files/jetpack-sdks/jetpack-5.0.2/Jetson_502_b232/cuda-repo-cross-aarch64-ubuntu2004-11-4-local_11.4.14-1_all.deb to /home/maryam/Downloads/nvidia/sdkm_downloads/cuda-repo-cross-aarch64-ubuntu2004-11-4-local_11.4.14-1_all.deb

Are you on VM or Ubuntu host PC? Which Ubuntu version?

Please skip the installation of Host machine and SDKs. Only flash the OS first and see if it can work.

Ubunto 20.04