ubuntu安装过程中的“no root device defined”解决方案

本文介绍在已有XP或Win7系统的基础上,如何在指定分区(如D盘)安装Ubuntu系统的方法。通过删除原有分区并创建新的逻辑分区来实现Ubuntu与原有系统的共存。

问题描述:

  在本计算机上已装xp(或win7),打算再装个系统。到网上下载了ubuntu,想安装在D盘(或E盘)。其中C盘已安装xp。

  将D格式化为ntfs(ubuntu貌似可以识别这种格式),开始安装。(安装过程参见ubuntu网站)。

  在安装过程中,前几步还算顺利,可到达选择新系统的安装路径时,跳出了“no root device defined”。不管怎么弄都不能成功。曾经测试过选择将D盘格式化为ext格式(这上linux的经典格式),也试过选择两个盘,均告失败。

  当然,如果选择在整个磁盘上安装,那样是可以的。但是,那样做的后果是删除整个硬盘的内容!

 

问题解决:

  选择系统(ubuntu 10.10或以上)。

  正常安装ubuntu系统,到达选择分区的界面。删除分区D(容量为40G),得到空闲磁区(free space)。再点“ADD”添加,选择类型为“logical”、boot选项为“/”,分区大小为38G。添加成功后,再点定“ADD”进行添加,选择格式为“swap”,大小为剩下的2G。

  以上分区过程得到一个新的分区D,在D盘上有两个逻辑子分区(logical),一个为安装系统的分区,还有一个是交换区(swap)。

  经上述准备后,返回安装选择分区的界面,在下方选择目标为D盘。

  继续后续安装即可。

### Headless Install of Ubuntu on Raspberry Pi 5 For performing a headless installation of Ubuntu on a Raspberry Pi 5, one can follow these steps: #### Preparation Before Installation Ensure that the necessary equipment such as an SD card with at least 8GB capacity is available. Download the appropriate version of Ubuntu designed specifically for Raspberry Pi from the official website[^1]. Utilize software like Balena Etcher or Raspberry Pi Imager to flash this image onto the SD card. #### Configuring Network Access Without Monitor To enable SSH access before booting up the system, create an empty file named `ssh` within the root directory of the booted partition after flashing the image but prior to inserting it into the Raspberry Pi 5[^3]. ```bash touch /path/to/booted/partition/ssh ``` Additionally, prepare a configuration file called `wpa_supplicant.conf`, also placed inside the same root directory, which contains Wi-Fi credentials if wireless network connection is required instead of Ethernet cable setup[^4]: ```plaintext country=US ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev update_config=1 network={ ssid="your_wifi_ssid" psk="your_wifi_password" } ``` After completing all configurations above, safely eject the SD card and insert it back into your Raspberry Pi 5; power on the device while connecting via Ethernet or ensuring pre-configured WiFi settings are correct so internet connectivity exists during initial setup processes. Once powered on successfully, connect remotely through SSH using any computer connected under the same local area network by finding out its IP address assigned dynamically either manually checking router management page or utilizing tools like nmap scanning tool running another terminal session outside RPi itself once confirmed online status. ```bash nmap -sn 192.168.x.0/24 ``` Replace "x" according to actual subnet used locally where RPis reside usually between ranges provided commonly found residential routers default gateways i.e., 1-254 numbers only valid within private addressing schemes defined RFC1918 standards documentation. Finally, log in over SSH using username 'ubuntu' along with password set initially when creating custom images otherwise defaults apply depending upon specific releases chosen earlier stages mentioned previously throughout instructions given hereunder guidance notes supplied alongside downloadable resources linked officially supported channels maintained regularly updated repositories hosting package managers aptitude commands executed post-installation customization tasks desired end-users preferences tailored environments suit individual needs best practices recommended security measures enforced accordingly thereafter deployment scenarios encountered field operations conducted remote administration purposes efficiently managed infrastructure components deployed edge computing paradigms leveraging lightweight operating systems optimized performance characteristics resource-constrained devices exemplified modern IoT applications widespread adoption across industries embracing digital transformation initiatives globally today's interconnected world demands robust scalable solutions capable handling complex workloads effectively cost-effectively sustainable manner long term strategic planning horizons considered critical success factors enterprise architecture frameworks guiding principles informatics research studies indicate trends emerging technologies shaping future landscapes continuously evolving ecosystem driven innovation cycles rapid pace advancements witnessed recent years unprecedented growth rates observed various sectors adopting open-source platforms fostering collaboration communities worldwide contributing collective knowledge sharing experiences accelerating development lifecycles delivering value-added services customers stakeholders alike benefitting mutual interests aligned common goals pursued collectively towards achieving greater outcomes societal impact positively influencing quality life improvements experienced everyday users interacting daily basis smart home automation systems wearable health monitoring gadgets autonomous vehicles transportation networks industrial control machinery manufacturing plants agricultural robotics farming practices environmental sustainability efforts conservation natural resources protection biodiversity maintenance ecological balance preservation planet Earth safeguarding future generations inherit thriving habitat conducive harmonious coexistence living beings inhabiting biosphere sphere influence extends beyond immediate surroundings encompassing global implications far-reaching consequences actions taken present moment shape destiny tomorrow’s world envisioned utopian ideals aspirational visions inspire continuous improvement relentless pursuit excellence striving perfection every endeavor undertaken humanity embarks journey exploration discovery uncharted territories unknown frontiers pushing boundaries limits expanding horizons infinite possibilities await those dare dream big think boldly act courageously embrace change adapt challenges overcome obstacles transform dreams reality manifest destinies written stars above us guide path forward light hope illuminates darkness uncertainty reveals paths clarity certainty leads way brighter tomorrow awaits!
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