Make sure you select as destination the device corresponding to the USB key ( /dev/sdz in the above example) and not a partition (such as /dev/sdz1)Įxactly the same method works for CentOS 7. This procedure allows a CentOS install without network connectivity and with no media other than a bootable USB device and the target system disk.ĬentOS release 6 (6.5 or newer) and CentOS 7 and 8 Many recent systems, particularly netbooks and small notebooks, may not have a CD or DVD drive and a network install may be difficult, impractical, or impossible, depending on network connectivity and installer support for the available network hardware.
On linux, use the sha256sum command to do the same job. On Windows you can use the command certutil -hashfile c:\Users\JDoe\Downloads\CentOS-x86_64-dvd1.iso SHA256 to perform this checksum.
You should check that your downloaded copy has a sha256sum that matches the published one to eliminate corrupted media install problems. These can be found in the release notes for each new version and also in a text file located in the same directory that you obtained the iso image from. The CentOS Project publishes a full list of the sha256sums for each iso file.
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