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This article introduces the relevant knowledge of "how to use UNetBootin to make CentOS USB installation disk". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Making USB installation disk of CentOS with UNetBootin

It is said that someone is willing to sponsor me more than 300 yuan to make a campus Linux server, this price is enough for a second-hand host, just put it together!

Go to Gangding on Tuesday afternoon to have a look at the secondhand goods and put a CentOS installation file on my USB drive so that you can test the USB installation system at the store.

After many twists and turns, the USB installation disk of CentOS was finally made. I use the Minimal version of CentOS6.0 iso installation file, write to USB disk using UNetBootin this tool.

The specific steps are as follows:

1. Install UNetBootin

Root@xiaoxia-pc:~# apt-get install unetbootin

2. Download the CentOS image file

I like to install the basic system first and then install the software online to keep the system lean, so I use the smaller minimal version. I downloaded it from NetEase's source, and users of Education Network can download it from the Education Network site.

Http://mirrors.163.com/centos/6/isos/i386/CentOS-6.0-i386-minimal.iso

3. Format USB flash drive

When I made the CentOS installation disk for the first time, I did not expect that the installation would not look for an image from the USB disk. There was only cdrom,hard drive,nfs and there was no usb, so the installation could not be carried out.

The solution is to partition the usb so that the system recognizes the usb media as a hard drive.

After inserting the flash drive, view the device file of the flash drive.

Root@xiaoxia-pc:~/test# dmesg | tail

[47750.801304] scsi 12:0:0:0: Direct-Access General USB Flash Disk 1100 PQ: 0 ANSI: 0 CCS

[47750.802578] sd 12:0:0:0: Attached scsi generic sg3 type 0

[47750.803043] sd 12 GB/7.49 GiB 0: [sdc] 15722496 GB/7.49 GiB

[47750.804222] sd 12:0:0:0: [sdc] Write Protect is off

[47750.804231] sd 12:0:0:0: [sdc] Mode Sense: 43 00 00 00

[47750.804236] sd 12:0:0:0: [sdc] Assuming drive cache: write through

[47750.808036] sd 12:0:0:0: [sdc] Assuming drive cache: write through

[47750.809045] sdc:

[47750.811045] sd 12:0:0:0: [sdc] Assuming drive cache: write through

[47750.811056] sd 12:0:0:0: [sdc] Attached SCSI removable disk

Format the USB disk and use fdisk to partition the USB disk.

Root@xiaoxia-pc:~/test# fdisk / dev/sdcCommand (m for help): oBuilding a new DOS disklabel with disk identifier 0x7e4c7a0e.Changes will remain in memory only, until you decide to write them.After that, of course, the previous content won't be recoverable.Warning: invalid flag 0x0000 of partition table 4 will be corrected by w (rite) Command (m for help): nCommand action e extended p primary partition (1-4) pPartition number (1-4): 1First cylinder (1-1022, default 1): Using default value 1Last cylinder, + cylinders or + size {K Default G} (1-1022, default 1022): Using default value 1022Command (m for help): pDisk / dev/sdc: 8049 MB, 8049917952 bytes248 heads, 62 sectors/track 1022 cylindersUnits = cylinders of 15376 * 7872512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x7e4c7a0e Device Boot Start End Blocks Id System/dev/sdc1 1 1022 7856112 83 LinuxCommand (m for help): aPartition number (1-4): 1Command (m for help): wThe partition table has been altered calling ioctl () to re-read partition table.Syncing disks.

Reinsert the USB disk and you can see that there is a U disk partition. Format the partition with fat and mount it.

Root@xiaoxia-pc:~/test# ls / dev/sdc*

/ dev/sdc / dev/sdc1

Root@xiaoxia-pc:~/test# mkfs.vfat / dev/sdc1

Mkfs.vfat 3.0.9 (31 Jan 2010)

Root@xiaoxia-pc:~/test# mount / dev/sdc1 / mnt

4. Use UNetBootin to make installation startup disk.

Enable UNetBootin, the interface is as follows, choose to use CD image.

Click "OK" to start copying files

Installation complete! Exit directly without restarting.

Check the file size of USB flash drive, only 287MB!

At this point, the USB installation disk of CentOS has been made successfully!

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In addition, to install successfully, you also need to copy the ISO file to the root directory of the USB installation disk, otherwise you will encounter the problem of unable to find the image during the installation process. As follows

Missing ISO 9660 image

The installer has tried to mount image # 1. But cannot find it on the hard drive.

Please copy this image to the drive and click Retry. Click Exit to abort the installation.

This is the end of the content of "how to use UNetBootin to make CentOS USB installation disk". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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