Veeam Agent for Linux 恢复统信服务器操作系统V201070 后第一次启动报错问题处理For RHEL/CentOS/SUSE systems, during the boot process, they will drop into the dracut emergency shell and display errors similar to:dracut-initqueue timeout - starting timeout scripts/dev/vgroot/root does not existCauseFaulty initramfsThis issue occurs because the initial ramdisk image does not contain the necessary block device kernel modules (drivers).The initial ramdisk image (initramfs/initrd) is an image of an initial root filesystem used as a part of the Linux boot process.The most common scenario for this is when restoring a virtual machine that was backed up using Veeam Agent for Linux to completely new hardware. For example, a virtual machine was backed up in VMware and restored to a Hyper-V environment.SolutionScenario 1: Faulty initramfs使用UOS Server 20 1070a 光盘启动到救援模式救援模式Rescue Mode救援模式是一个从光盘介质启动独立的环境它会以只读或读写的方式挂载原有根文件系统并提供一系列工具进行故障排查。通常用于系统数据恢复修复根文件系统或者重建GRUB引导程序等。安装镜像启动盘引导进入救援模式选择Rescue U0S Server20救援模式Rescue Mode救援模式是一个从光盘介质启动独立的环境它会以只读或读写的方式挂载原有根文件系统并提供一系列工具进行故障排查。通常用于系统数据恢复修复根文件系统或者重建GRUB引导程序等。安装镜像启动盘引导进入救援模式选择Rescue U0S Server20Install UOS Server 20 (Graphic)使用图形用户界面模式安装。Install UOS Server 20字符界面安装无用户界面交互模式。Rescue U0S Server20: 救援模式。Check ISO md5sum校验 ISO 镜像的完整性。选择1)Continue继续正常的系统引导过程1Continue继续正常的系统引导过程。2Read-only mount将根文件系统挂载为只读以便进行文件系统的检查或修复。3Skip to shell跳过其他所有启动相关的脚本直接进入一个简单的shell界面。4Quit (Reboot)退出引导过程并重新启动计算机。默认系统根分区路径为/mnt/sysroot目录根据提示按“ENTER”键进入shell通过chroot /mnt/sysroot命令切换系统根分区为当前活动的根分区Distro Specific Initramfs Rebuild InstructionsNow that you have identified the initramfs that needs to be rebuilt, expand the section below matching the distro for information about rebuilding it.RHEL/CentOS/Oracle LinuxThese distributions usedracutto manage initramfs images. The general syntax to rebuild initramfs image is:dracut -f -v /boot/initramfs-kernel version.img kernel versionHere, kernel version has to be replaced with the kernel version for which the initramfs is being rebuilt.Example:# ls -la /boot/initramfs-*-rw-------. 1 root root 65698610 Aug 8 2019 /boot/initramfs-0-rescue-b15a66f034f840ecb6a1205c983df822.img-rw-------. 1 root root 19683576 Sep 13 2020 /boot/initramfs-4.18.0-193.19.1.el8_2.x86_64kdump.img-rw-------. 1 root root 27783687 Nov 8 2020 /boot/initramfs-4.18.0-193.28.1.el8_2.x86_64.img-rw-------. 1 root root 22324786 Nov 8 2020 /boot/initramfs-4.18.0-193.28.1.el8_2.x86_64kdump.img-rw-------. 1 root root 27989970 Dec 6 13:17/boot/initramfs-4.18.0-240.10.1.el8_3.x86_64.img-rw-------. 1 root root 22485564 Jan 17 2021 /boot/initramfs-4.18.0-240.10.1.el8_3.x86_64kdump.img-rw-------. 1 root root 27943270 Jan 17 2021 /boot/initramfs-4.18.0-240.1.1.el8_3.x86_64.img-rw-------. 1 root root 22485474 Jan 17 2021 /boot/initramfs-4.18.0-240.1.1.el8_3.x86_64kdump.imgHere,/boot/initramfs-4.18.0-240.1.1.el8_3.x86_64.imgimage corresponds to4.18.0-240.1.1.el8_3.x86_64kernel.To rebuild it with dracut, run:dracut -f -v /boot/initramfs-4.18.0-240.1.1.el8_3.x86_64.img 4.18.0-240.1.1.el8_3.x86_64More information:How to rebuild the initial ramdisk image in Red Hat Enterprise Linuxpasswd 修改用户密码exit退出当前bashreboot重启系统