How to install Linux system using USB disk

Step one: Make a Linux bootable USB flash drive

1. First, prepare a USB flash drive larger than 8G, because the current images are basically more than 3G, and a 4G USB flash drive may not have enough space. At the same time, download the CentOS 7.4 installation image and the software UltraISO that burns the image to a USB flash drive in advance. As shown in the figure below:

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2. After opening UltraISO, its operation interface is as shown in the figure below. Click on the file in the upper left corner, and then click Open. Select the CentOS 7.4 installation image we just showed. Then click Open.

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3, at this time you can see everything in the image in the UltraISO interface file, then click the startup option on the interface and choose to create a hard disk image. At this time, Ultraiso will automatically detect the U disk we inserted. If you have multiple U disks plugged into your computer at the same time, you can click the drop-down button to select the U disk you want to write the image to. Don’t make a mistake because this step The USB drive will be formatted. After selecting, click Write and the hard disk image will start to be created. We wait patiently for the creation to be completed.

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4, after waiting for the image to be created, we can see the prepared U disk in the system. At this time, the name of the U disk has changed to CentOS 7. As shown in the figure below, we Unplug the USB flash drive and insert it into the computer where Linux is to be installed. Then you can prepare to use this USB flash drive to install the Linux system.

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Step 2: Install Linux from USB disk

1, After the U disk is inserted into the computer where Linux is to be installed, start the computer. During startup, keep pressing the F2 key to enter the BIOS control interface of the motherboard. Press the left and right keys to move to the boot option. Then press the up and down keys to go to the removeable device option, and then press the number to move its position to the top. Because my computer is relatively old, the USB flash drive can only be displayed as a removeable device. For some newer motherboards, the name of the USB flash drive can be displayed directly. Then just move this name to the top. Then press F10 to save the settings, press Enter to confirm, and the system will start to restart.

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2. After restarting, it will automatically boot from the U disk, and then the installation options for the Linux system will be displayed. Move the mouse to the first Install CentOS 7, and then hit Enter. Press Enter again to start the installation.

The first step, the default language is English, click continue to continue to the next step.

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The second step is to set the correct time zone. Because the time zone is incorrect, the time configured by many software may be wrong. First click the Date icon, then click the Shanghai location on the map, change the time zone to Aisa/Shanghai, and then change the time to the current time and date. When finished, click the done button in the upper right corner to save the settings.

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The third step is to modify the default language settings. Because the default language set in the first step is English, this will provide better support for the software, but we also need to add Chinese support, so that when executing the script, the chance of garbled characters will be smaller. After saving the time and date, click language support. Then scroll to the bottom, click Chinese, and then check Simplified Chinese. After selecting, click done to save the settings.

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The fourth step is to click INSTALLATION DESTINATION and select the installation location. The hard disk you installed will be selected here. My hard drive is relatively small, only 100g, so I choose this, and it will be automatically partitioned by default. Newbies are advised to use the default settings. After selecting, click done to save the settings. At this point, all settings have been saved and preparations for installation have begun. Click begin install in the lower right corner to start the formal installation of Linux.

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3. At this time, the installation program will start to copy files, set hard disk startup items, etc. At this time, we will be reminded that we have not set a root password. We click on that prompt, go in and set the correct root password, and then click done to save. Just wait patiently for it to be installed.

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4. After the installation is completed, the reboot button will be displayed and you will be prompted that it has been successful. Install. At this point the installation process is basically complete. Click the reboot button to restart the system. You will see the startup items of the Linux system. Then you will jump to the login interface. Enter your account and password, log in, and enter the terminal. The system is ready to use.

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