The chroot command changes the apparent root directory (/) for the current running process and its children to the specified directory—in this case, /home/jdoe.
This "jails" the shell (bash) into /home/jdoe, limiting file system access to that subtree.
It does not change ownership (A), grant privileges (B or C), but provides a confined environment (sandbox).
GICSP discusses chroot as a containment and security mechanism in ICS system hardening.
[Reference:, , GICSP Official Study Guide, Domain: ICS Security Operations & Incident Response, , Linux man pages for chroot, , GICSP Training on System Hardening and Access Controls]
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