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.
Dell R730 w/ 2x E5-2650v3 10c, 192GB (12x16GB) RAM, H730 Mini, 2x 750W PSU
$499.99
DELL PowerEdge R730 Server 2x E5-2690v3 2.6GHz =24 Cores 32GB H730 4xRJ45
$275.00
Dell PowerEdge R720XD Xeon E5-2680 V2 2.8GHz 20 Cores 256GB RAM 12x4TB
$510.00
Dell PowerEdge R730XD 28 Core Server 2X Xeon E5-2680 V4 H730 128GB RAM No HDD
$389.99
Dell PowerEdge R620 Server 2x Xeon E5-2620 @ 2.0GHz 64GB RAM NO HDDs
$108.96
Dell PowerEdge R730, 2 sinks, SystemBoard, 8 trays,H330,Idrac 8 exp, 2x750w Psu
$135.00
Dell PowerEdge R630 2x Xeon E5-2630 V4 2.20GHZ 128GB DDR4-2133MHZ 2x 750W PSU
$170.95
Dell PowerEdge R620 Server - 256GB RAM, 2x8c CPU, 128Gb SSD/3x600Gb SAS, Proxmox
$320.00
DELL PowerEdge R730 Server 2x E5-2643v3 3.4GHz =12 Cores 64GB H730 4xRJ45
$306.00
Dell PowerEdge R620 Rack Server
$71.99