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CachyOS

How To Install CachyOS & Partition Guide

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Erase Disk

The “Erase Disk” Option in Calamares will wipe the selected disk and install CachyOS to the target.

  1. Boot into the ISO and click on Launch Installer.

  2. Select the preferred Boot Manager. Check the Boot Managers section for more information.

  3. Set the preferred Language and Region/Timezone.

  4. Configure Keyboard Layout.

  5. Select Erase Disk and choose a Filesystem.

  6. Select the Desktop Environment of choice, see Desktop Environments.

  7. Customize which packages should or should not be installed during the installation process.

  8. Setup login credentials.

  9. Review the installation summary on the Overview Page carefully. Proceed with the installation by clicking on Install Now if everything looks correct. Otherwise, go back and make any necessary changes.

Manual Partitioning

UEFI/GPT

The partition table for each boot manager varies. Please follow the correct instructions for each.

  1. Boot into the ISO and click the Launch Installer button

  2. Set the preferred Language and Region/Timezone.

  3. Configure Keyboard Layout.

  4. Select Manual partitioning.

  5. Create a new partition with the following:

    • Size: 2048MiB
    • Filesystem: FAT32
    • Mount point: /boot
    • Flags: boot

  6. Create another partition for root:

    • Size: At least 20000MiB
    • Filesystem: Any, refer Filesystem
    • Mount point: /
    • Flags:

  7. Double check that Install boot loader on: is pointing to /boot

  8. Select the Desktop Environment of choice, see Desktop Environments.

  9. Customize which packages should or should not be installed during the installation process.

  10. Setup login credentials.

  11. Review the installation summary on the Overview Page carefully. Proceed with the installation by clicking on Install Now if everything looks correct. Otherwise, go back and make any necessary changes.

MBR/BIOS

  1. Boot into the ISO and click the Launch Installer button

  2. Set your preferred Language and Region/Timezone.

  3. Configure your Keyboard Layout.

  4. Select Manual partitioning.

  5. Create a new partition with the following:

    • Size: At least 20000MiB
    • Filesystem: Any, refer Filesystem
    • Mount point: /
    • Flags:

  6. Double check that Install boot loader on: is pointing to your boot drive e.g: /dev/sda

  7. Pick the Desktop Environment you’d like to use, see Desktop Environments.

  8. Select the specific packages you wish to install from the provided list, and deselect any that you do not require.

  9. Setup your login credentials.

  10. Review the installation summary on the Overview Page carefully. If all the settings look correct for you, proceed with the installation by clicking on Install Now. Otherwise, go back and make any necessary changes.

Dual Booting

After manual partitioning, additional setup may be required to configure a dual boot system, especially with systemd-boot and GRUB.

We need to copy the Windows EFI binaries to the Linux EFI partition so that the boot manager can recognize them.

  1. Locate the Windows EFI partition with lsblk

    Example
    ❯ lsblk -o NAME,FSTYPE,SIZE,MOUNTPOINT
    NAME        FSTYPE   SIZE MOUNTPOINT
    zram0               15.3G [SWAP]
    nvme0n1            476.9G
    ├─nvme0n1p1 vfat     100M
    ├─nvme0n1p2           16M
    ├─nvme0n1p3 ntfs   234.4G
    ├─nvme0n1p4 ntfs     830M
    ├─nvme0n1p5 vfat       2G /boot
    └─nvme0n1p6 btrfs  239.6G /var/tmp

    EFI partitions are almost always formatted as FAT32/vfat, and since nvme0n1p1 does not have a Linux mount point, assume that this partition is the Windows EFI partition.

  2. Temporarily mount the Windows EFI partition.

    Terminal window
    ❯ sudo mount /dev/nvme0n1p1 /mnt/WinBoot # Replace `nvme0n1p1` with the partition of Windows's EFI partition

  3. Copy the EFI binaries from the Windows EFI partition to the Linux EFI partition.

    Terminal window
    ❯ sudo cp -r /mnt/WinBoot/EFI/* /boot/EFI

  4. Unmount the previously mounted partition, and Windows should appear in the boot menu on the next startup.

    Terminal window
    ❯ sudo umount /mnt/WinBoot

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