win7硬盘安装Ubuntu12.04 64位时显示Error 15: File not found.

安装Ubuntu12.04 -64位时,用EasyBCD建好引导文件重启电脑后出现如下错误:

Error 15: File not found

原因一个是安装文件所在盘符不对,另一个是文件名。Ubuntu12.04 32位的ISO包解压后casper文件夹下内核文件为vmlinuz,而64位解压后casper文件夹下内核文件为vmlinuz.efi。用EasyBCD创建的引导文件中内核文件所用名字为vmlinuz,所以出错。可以将vmlinuz.efi改名为vmlinuz即可解决。

medivh@DT-AND-11430203:~$ sudo add-apt-repository ppa:team-gcc-arm-embedded/ppa This PPA is an alternative to toolchain released at https://launchpad.net/gcc-arm-embedded. The source codes for both are same. Currently supports Ubuntu 10.04/12.04/14.04/14.10 32 and 64 bit. Detailed explanations to Launchpad PPA can be found at https://help.launchpad.net/Packaging/. That website explains how a PPA is set up and how to add existing PPA and install software from it. Here are quick steps to install toolchain from this PPA on Ubuntu before 14.04: Step1: Inside Ubuntu, open a terminal and input "sudo add-apt-repository ppa:team-gcc-arm-embedded/ppa" Step2: Continue to input "sudo apt-get update" Step3: Continue to input to install toolchain "sudo apt-get install gcc-arm-embedded" To remove installed toolchain, just input "sudo apt-get remove gnu-arm-embedded". To update the toolchain, just repeat above step2 and step3. If it reports error message of conflict to gcc-arm-none-eabi, which is likely if upgrading from 4.x to 5+, please uninstall it first with: "sudo apt-get remove gcc-arm-none-eabi" Questions should be asked at https://answers.launchpad.net/gcc-arm-embedded Bug can be filed at https://bugs.launchpad.net/gcc-arm-embedded/+filebug. It is highly encouraged to ask question first before filing a bug. More info: https://launchpad.net/~team-gcc-arm-embedded/+archive/ubuntu/ppa Press [ENTER] to continue or Ctrl-c to cancel adding it. Ign:1 http://ppa.launchpad.net/team-gcc-arm-embedded/ppa/ubuntu focal InRelease Hit:2 http://security.ubuntu.com/ubuntu focal-security InRelease Err:3 http://ppa.launchpad.net/team-gcc-arm-embedded/ppa/ubuntu focal Release 404 Not Found [IP: 185.125.190.80 80] Hit:4 http://archive.ubuntu.com/ubuntu focal InRelease Hit:5 http://archive.ubuntu.com/ubuntu focal-updates InRelease Hit:6 http://archive.ubuntu.com/ubuntu focal-backports InRelease Reading package lists... Done E: The repository 'http://ppa.launchpad.net/team-gcc-arm-embedded/ppa/ubuntu focal Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. 这是什么问题,怎么解决
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