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Updating BIOSes from Linux

1. Download appropriate CD image from support.lenovo.com
2. Convert the CD image into a USB-bootable image w/ geleltorito, e.g.

geteltorito -o bios.img g2uj18us.iso

1. dd the image to a USB stick, e.g.

dd if=bios.img of=/dev/sdb bs=1M

1. Reboot machine w/ USB stick inserted. Hit F12 on bootup to see boot menu.

Source: Updating the BIOS on Lenovo laptops from Linux using a USB flash stick

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