Why is the root file system mounted read-only during boot and remounted with write permission later on?
A. Because if problems with the root file system are detected during the boot, fsck can be run, without risk of damage.
B. Because this way crackers cannot collect information about root with boot sniffers.
C. To avoid writing to the disk, unless the root password is known.
D. To avoid other operating systems overwriting the Linux root partition.
E. Because the disk has its own write protection that cannot be changed by the operating system.
題解
「fsck」工具可以檢查和修復檔案系統。開機時掛載的檔案系統都會使用「fsck」來檢查(或修復)，為了確保root的檔案系統不會因為寫入快取等因素和「fsck」的連用而導致檔案系統出現問題，所以會先以唯讀的方式掛載。