Installing to flash disk gives you an option to install with an "n" option. Once installed in this manor the drive is protected from any changes, a reboot reverts the drive to just as it was. Now is there a way to change the umask=000 so that the drive can have changes made from time to time but locked down the rest of the time. I have young students that use the notebooks and the write protection is great until I need to add something.
Lenovo IdeaPad 5i Slim 5 16IRL8 16" (512GB SSD, Intel Core i5-1335U, 1.30GHz,...
$422.10
~OVERSTOCK~ 15.6" Lenovo ThinkPad Laptop: 8GB RAM 512 GB SSD Windows 10
$179.99
~CD/DVD DRIVE~15.6" Lenovo ThinkPad Laptop PC: Intel i5 16GB RAM 512GB SSD
$189.99
Lenovo Thinkpad E15 Gen1 Core i3-10110U 8GB RAM/256GB NVME SSD & 256GB SATA SSD
$110.00
Notebook Lenovo Slim Pro 9 Laptop, 16" Glass, i9-13905H, GB, 1TB SSD
$1022.99
Lenovo IP 5 16IAU7 16" 2.5K Chromebook i3-1215U 8GB Ram 128GB eMMC Chrome OS
$219.99
Lenovo ThinkPad Yoga 11e 11.6" 2in1 Touch Intel Core i3 4GB RAM 128GB SSD Win10
$59.00
Lenovo ThinkPad X1 Nano 13" Touchscreen 2K i7-1180G7 16GB/256GB Win 10 Pro
$555.00
Lenovo K14 AMD Laptop, 14" FHD IPS LED , Ryzen 5 5600U, GB, 256GB SSD
$569.00
Lenovo ThinkPad 14" Laptop Computer Core i7 16GB RAM 256GB SSD Windows 10 Pro
$229.99