我已经下载了 boot-repair-disk.ISO，但建议检查 md5sum。之前的下载可能因为下载已损坏而无法使用。目前在 Live USB 上以双启动方式运行 Kubuntu 16.04，与 Windows 7 一起启动，当我尝试升级到 W10 时，启动出现问题
答案1
在下载的同时，您应该已经收到下载校验和文件的提示。如果您有校验和文件，您可以调用：
# change according to how the sum file is called and make sure both are in the same directory
md5sum -c boot-repair-disk.ISO.sum
答案2
将 iso 刻录到 usb 后，打开 usb 路径中的控制台。您将找到一个名为 md5sum.txt 的文件。
运行 md5sum -c md5sum.txt 它将检查 USB 驱动器中的每个文件夹，它将为每个文件夹显示一条消息
在此示例中，某些文件夹不匹配
./README.diskdefines: La suma coincide
./pics/blue-lowerright.png: La suma coincide
./pics/blue-upperleft.png: La suma coincide
./pics/logo-50.jpg: La suma coincide
./pics/debian.jpg: La suma coincide
./pics/blue-upperright.png: La suma coincide
./pics/blue-lowerleft.png: La suma coincide
./pics/red-lowerleft.png: La suma coincide
./pics/red-upperright.png: La suma coincide
./pics/red-upperleft.png: La suma coincide
./pics/red-lowerright.png: La suma coincide
./install/README.sbm: La suma coincide
./install/sbm.bin: La suma coincide
./install/mt86plus: La suma coincide
./boot/grub/loopback.cfg: La suma coincide
./boot/grub/grub.cfg: La suma coincide
./EFI/BOOT/bootia32.efi: La suma coincide
./dists/bionic/multiverse/binary-i386/Release: La suma coincide
./dists/bionic/multiverse/binary-i386/Packages.gz: La suma coincide
./dists/bionic/Release.gpg: La suma coincide
./dists/bionic/restricted/binary-i386/Release: La suma coincide
./dists/bionic/restricted/binary-i386/Packages.gz: La suma coincide
./dists/bionic/Release: La suma coincide
./dists/bionic/main/binary-i386/Release: La suma coincide
./dists/bionic/main/binary-i386/Packages.gz: La suma coincide
./dists/bionic/universe/binary-i386/Release: La suma coincide
./dists/bionic/universe/binary-i386/Packages.gz: La suma coincide
./pool/main/m/mouseemu/mouseemu_0.16-0ubuntu10_i386.deb: La suma coincide
./pool/main/m/make-dfsg/make_4.1-9.1ubuntu1_i386.deb: La suma coincide
./pool/main/s/setserial/setserial_2.17-50_i386.deb: La suma coincide
./pool/main/h/hw-detect/archdetect-deb_1.117ubuntu6.18.04.1_i386.deb: La suma coincide
./pool/main/libf/libfile-fcntllock-perl/libfile-fcntllock-perl_0.22-3build2_i386.deb: La suma coincide
./pool/main/libd/libdebian-installer/libdebian-installer4_0.110ubuntu2_i386.deb: La suma coincide
./pool/main/u/ubiquity/ubiquity_18.04.14.15_i386.deb: La suma coincide
./pool/main/u/ubiquity/oem-config_18.04.14.15_all.deb: La suma coincide
./pool/main/u/ubiquity/oem-config-gtk_18.04.14.15_all.deb: La suma coincide
./pool/main/u/ubiquity/ubiquity-frontend-gtk_18.04.14.15_i386.deb: La suma coincide
./pool/main/u/ubiquity/ubiquity-ubuntu-artwork_18.04.14.15_all.deb: La suma coincide
./pool/main/u/user-setup/user-setup_1.63ubuntu5_all.deb: La suma coincide
./pool/main/r/rdate/rdate_1.2-6_i386.deb: La suma coincide
./pool/main/libt/libtimezonemap/libtimezonemap-data_0.4.5_all.deb: La suma coincide
./pool/main/libt/libtimezonemap/libtimezonemap1_0.4.5_i386.deb: La suma coincide
./pool/main/libt/libtimezonemap/gir1.2-timezonemap-1.0_0.4.5_i386.deb: La suma coincide
./pool/main/libx/libxklavier/gir1.2-xkl-1.0_5.4-3_i386.deb: La suma coincide
./pool/main/n/network-manager/gir1.2-nm-1.0_1.10.6-2ubuntu1.4_i386.deb: La suma coincide
./pool/main/n/network-manager-applet/gir1.2-nma-1.0_1.8.10-2ubuntu3_i386.deb: La suma coincide
./pool/main/i/ido/libido3-0.1-0_13.10.0+17.04.20161028-0ubuntu1_i386.deb: La suma coincide
./pool/main/j/json-glib/gir1.2-json-1.0_1.4.2-3ubuntu0.18.04.1_i386.deb: La suma coincide
./pool/main/p/pptp-linux/pptp-linux_1.9.0+ds-2_i386.deb: La suma coincide
./pool/main/p/python-pam/python3-pam_0.4.2-13.2ubuntu4_i386.deb: La suma coincide
./pool/main/p/pyicu/python3-icu_1.9.8-0ubuntu1_i386.deb: La suma coincide
./pool/main/d/dpkg-repack/dpkg-repack_1.43_all.deb: La suma coincide
./pool/main/d/dpkg/libdpkg-perl_1.19.0.5ubuntu2.3_all.deb: La suma coincide
./pool/main/a/apt-clone/apt-clone_0.4.1ubuntu2_all.deb: La suma coincide
./pool/main/c/cryptsetup/cryptsetup_2.0.2-1ubuntu1.1_i386.deb: La suma coincide
./pool/main/c/cryptsetup/cryptsetup-bin_2.0.2-1ubuntu1.1_i386.deb: La suma coincide
./pool/main/c/casper/ubiquity-casper_1.394.3_all.deb: La suma coincide
./pool/main/l/lupin/lupin-support_0.57build1_i386.deb: La suma coincide
./pool/universe/g/grub2/grub2_2.02-2ubuntu8.17_i386.deb: La suma coincide
./pool/universe/c/caspar/caspar_20170830-1_all.deb: La suma coincide
./.disk/cd_type: La suma coincide
./.disk/base_installable: La suma coincide
./.disk/casper-uuid-generic: La suma coincide
./.disk/release_notes_url: La suma coincide
./.disk/info: La suma coincide
./casper/filesystem.squashfs.gpg: La suma coincide
./casper/filesystem.manifest: La suma coincide
./casper/filesystem.size: La suma coincide
./casper/filesystem.squashfs: La suma no coincide
./casper/initrd: La suma coincide
./casper/filesystem.manifest-remove: La suma coincide
./casper/vmlinuz: La suma coincide
./casper/filesystem.manifest-minimal-remove: La suma coincide
./preseed/cli.seed: La suma coincide
./preseed/lubuntu.seed: La suma coincide
md5sum: ATENCIÓN: 1 suma calculada NO coincidió