olemus
FTP-seansi kinnistamine failisüsteemi mingile osale,
tavaliselt kasutaja enda kataloogipuule
=
locking the ftp session to a particular subset of the filesystem

ülevaateid
https://itecnotes.com/server/ftp-what-does-ftp-jailing-mean-and-what-features-does-a-server-os-require-in-order-to-enable-it/

https://kb.hostineer.com/ftp/jailing-users/

https://siva2009.wordpress.com/2010/02/27/ftp-jailing-or-chroot-users-%E2%80%93-limit-users-to-only-their-home-directory-using-vsftp/