Added instructions for creating a linux UEFI boot stick

uefi-usb-boot-stick/EFI/BOOT/grub.cfg

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+set default="1"
+
+function load_video {
+  insmod efi_gop
+  insmod efi_uga
+  insmod video_bochs
+  insmod video_cirrus
+  #
+  insmod ieee1275_fb
+  insmod vbe
+  insmod vga
+  insmod video_bochs
+  insmod video_cirrus
+  #
+  insmod all_video
+}
+
+load_video
+set gfxpayload=keep
+insmod gzio
+#
+insmod increment
+insmod xfs
+insmod part_gpt
+insmod fat
+insmod blscfg
+#
+insmod part_gpt
+insmod ext2
+
+set timeout=-1
+
+search --no-floppy --set=root -l 'RESCUE'
+
+menuentry 'Colibri' {
+	linuxefi /images/colibri/vmlinuz root=/dev/mapper/centos-root ro crashkernel=auto resume=/dev/mapper/centos-swap rd.lvm.lv=centos/root rd.luks.uuid=luks-0dd30579-2c04-422c-b6c6-3ab35d4c783f rd.lvm.lv=centos/swap rhgb quiet intel_iommu=on
+	initrdefi /images/colibri/initrd.img
+}
+
+menuentry 'Rocky' {
+        linuxefi /images/rocky/vmlinuz root=/dev/mapper/centos-rockyroot ro crashkernel=auto resume=/dev/mapper/centos-swap rd.lvm.lv=centos/rockyroot rd.luks.uuid=luks-0dd30579-2c04-422c-b6c6-3ab35d4c783f rd.lvm.lv=centos/swap rhgb quiet intel_iommu=on
+        initrdefi /images/rocky/initrd.img 
+}     
+
+menuentry 'buzzard' {
+        linuxefi /images/buzzard/vmlinuz root=/dev/mapper/centos-root ro rd.lvm.lv=centos/root rd.luks.uuid=luks-7a701398-14f8-428c-93c6-09e340beb118 rd.luks.options=discard rd.lvm.lv=centos/swap rhgb quiet LANG=en_US.UTF-8 nouveau.modeset=0 rd.driver.blacklist=nouveau
+        initrdefi /images/buzzard/initrd.img 
+}   
+
+

uefi-usb-boot-stick/EFI/BOOT/grub.cfg.orig

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+set default="1"
+
+function load_video {
+  insmod efi_gop
+  insmod efi_uga
+  insmod video_bochs
+  insmod video_cirrus
+  #
+  insmod ieee1275_fb
+  insmod vbe
+  insmod vga
+  insmod video_bochs
+  insmod video_cirrus
+  #
+  insmod all_video
+}
+
+load_video
+set gfxpayload=keep
+insmod gzio
+#
+insmod increment
+insmod xfs
+insmod part_gpt
+insmod fat
+insmod blscfg
+#
+insmod part_gpt
+insmod ext2
+
+set timeout=-1
+
+search --no-floppy --set=root -l 'RESCUE'
+
+menuentry 'Colibri' {
+	linuxefi /images/colibri/vmlinuz root=/dev/mapper/centos-root ro crashkernel=auto resume=/dev/mapper/centos-swap rd.lvm.lv=centos/root rd.luks.uuid=luks-0dd30579-2c04-422c-b6c6-3ab35d4c783f rd.lvm.lv=centos/swap rhgb quiet intel_iommu=on
+	initrdefi /images/colibri/initrd.img
+}
+
+menuentry 'Rocky' {
+        linuxefi /images/rocky/vmlinuz root=/dev/mapper/centos-rockyroot ro crashkernel=auto resume=/dev/mapper/centos-swap rd.lvm.lv=centos/rockyroot rd.luks.uuid=luks-0dd30579-2c04-422c-b6c6-3ab35d4c783f rd.lvm.lv=centos/swap rhgb quiet intel_iommu=on
+        initrdefi /images/rocky/initrd.img 
+}     
+

uefi-usb-boot-stick/createboot.md

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+# Creating a bootable USB UEFI stick
+
+## Identify the drive
+
+Insert your USB stick and tail /var/log/message to find out the device name.
+Then set the device name in a variable 
+
+
+```
+DRIVE=/dev/sdc
+```
+
+
+## Initial formatting of the USB stick
+
+This is a one-time operation. When updating the USB stick 
+this step can be skipped. 
+
+
+Formatting:
+* gpt partition table
+* primary partition of type ext2 
+* primary partition of type EFI (EF)
+* label /dev/sdc1 as RESCUE 
+
+```
+parted ${DRIVE}
+```
+
+Create partitions in parted: 
+```
+mktable gpt 
+mkpart primary ext2 1 512MB
+mkpart primary fat32 512MB 1024MB 
+set 2 boot on
+```
+
+
+Format the partitions: 
+```
+mkfs.ext2 ${DRIVE}1  # this will contain the images. 
+mkfs.vfat ${DRIVE}2  # this will contain the UEFI bootloader and grub.cfg
+e2label ${DRIVE}1 RESCUE
+```
+
+## Synchronize file to the USB stick
+
+
+Sync images: 
+```
+mount ${DRIVE}1 /mnt/tmp
+mkdir -p /mnt/tmp/images
+rsync -av images/ /mnt/tmp/images/
+umount /mnt/tmp
+```
+
+Sync the grub configuration: 
+```
+mount ${DRIVE}2 /mnt/tmp
+mkdir -p /mnt/tmp/EFI
+rsync -av EFI/ /mnt/tmp/EFI/
+umount /mnt/tmp 
+```
+
+  
+
+
+

uefi-usb-boot-stick/images/README.md

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+
+* initramdisks are dummies since they can be large and may be a security risk 
+* * * * * * * * kernel images are also dummies to reduce the size 

uefi-usb-boot-stick/images/buzzard/README.md

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+
+Symbolic links work too. This reduces maintenance since this allows you to use 
+initrd.img and vmlinuz as names in the grub.cfg, and only requires updating of
+symlinks to move to another version.

uefi-usb-boot-stick/images/buzzard/initrd.img

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+initramfs-3.10.0-1160.80.1.el7.x86_64.img

uefi-usb-boot-stick/images/buzzard/vmlinuz

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+vmlinuz-3.10.0-1160.80.1.el7.x86_64