A readonly filesystem on bootable CD

LinuxSecurity: “Previous work to make a read-only mounting of root and /usr on a normal hard disk was working for Sparc and i386 in October 2000. With upgrades to
-current every now and then, I noticed that with my changes to tcpdump, /etc files, cg3 and cg6 drivers, dhclient-script, miscellaneous others — let alone the
*/conf/ files to hard-wire device numbers to disk and tape drives, that it was nearly impossible to keep up with the development changes.”