← из прошлого урока
In the last lesson you worked out the rwx bits and chmod. Now the natural question: who hands out those permissions, and why can one user delete another's file. Meet the residents of the system.
Базовый
10 мин · урок входит в курс «Базовый»
Every process-and-pid in Linux runs on behalf of someone: it has a
UID (user id) and a GID (group id). Files also have an owner and a
group, the very "owner" and "group" parts you saw in
file-permissions. The commands id, whoami, groups, and sudo
all revolve around these ideas.
Чтобы запустить sandbox и пройти этот урок целиком, нужен соответствующий курс. Внутри - ещё много практических уроков того же уровня и сквозной прогресс.
дальше →
A file's owner is fine, but who is reading it right now is already a question about processes. Next: PIDs, parents and children, and signals: how to tell a program "shut down" and how to tell it "die now".