How to admin force close notebooks?

Based on Datalore server logs (Docker) there are some notebook sessions running:

Kmi2fC6bXqIwo3ianK [with source P5QjKmi2fC6bXqIwo3ianK/JkGt4TqadydcnSa8bx4VHi]
datalore-env-datalore-1  | 09:53:01.343 INFO  [Computation edt_5_5] j.d.n.s.c.c.ComputationControllerImpl    Setting computation status to COMPUTATION_CREATED for NOTEBOOK session dEr50IABZTLbTMkWzSyVvY owned by ANFIAouVqBeuSizaLr2WUX [with source ANFIAouVqBeuSizaLr2WUX/NkL7rF0ptKkQYRQ6yk3puF]
datalore-env-datalore-1  | 09:53:01.345 INFO  [Computation edt_1_1] j.d.n.s.c.c.ComputationControllerImpl    Setting computation status to COMPUTATION_CREATED for NOTEBOOK session RdoFnXQIlT5vhzAHZ5Owj1 owned by ANFIAouVqBeuSizaLr2WUX [with source ANFIAouVqBeuSizaLr2WUX/aze8JwW4ewhWjdSxZuT6AS]
datalore-env-datalore-1  | 09:54:33.873 INFO  [Computation edt_5_5] j.d.n.s.c.controller.ComputationHolder   Computation NOTEBOOK session 11jBI5JmSyDAZkP02NNhwR owned by jpakWHY96DJCdQzqc2pdJr [with source jpakWHY96DJCdQzqc2pdJr/ZhEFb4jsSucQ0erGClENKY] can be disposed: true false
datalore-env-datalore-1  | 09:54:33.876 INFO  [Computation edt_5_5] j.d.n.s.c.c.ComputationControllerImpl    Setting computation status to NONE for NOTEBOOK session 11jBI5JmSyDAZkP02NNhwR owned by jpakWHY96DJCdQzqc2pdJr [with source jpakWHY96DJCdQzqc2pdJr/ZhEFb4jsSucQ0erGClENKY]
datalore-env-datalore-1  | 09:54:37.127 INFO  [Datalore EDT Manager] j.d.a.s.i.i.BaseInstanceManager          Agent basic-agent-St3WWoZjWJvgiBWz has been destroyed
datalore-env-datalore-1  | 09:56:03.464 INFO  [Computation edt_8_8] j.d.n.s.c.c.BackgroundComputationController Updating idle timeout for Ruyk3X3SoXonkhow3e5pXy(ANFIAouVqBeuSizaLr2WUX/dsHXtUkU4isKuvtU1P7hWY) to -1
datalore-env-datalore-1  | 09:56:03.464 INFO  [Computation edt_6_6] j.d.n.s.c.c.BackgroundComputationController Updating idle timeout for Db9dkrqdMX935BnMbYhUci(ANFIAouVqBeuSizaLr2WUX/ov0LfXfwhzwxyVn8MBYX61) to -1
datalore-env-datalore-1  | 09:56:03.464 INFO  [Computation edt_9_9] j.d.n.s.c.c.BackgroundComputationController Updating idle timeout for NT7ZSjXKVxZkpFmGg496Ie(ANFIAouVqBeuSizaLr2WUX/zbOagglDGuqojXBrrkfDpL) to -1
datalore-env-datalore-1  | 09:56:03.477 INFO  [Computation edt_7_7] j.d.n.s.c.c.BackgroundComputationController Updating idle timeout for S0mb9fqUEmFdlLMEnejONT(ANFIAouVqBeuSizaLr2WUX/qNJXOSSZIxpJx5rsYGwjxW) to -1
datalore-env-datalore-1  | 09:56:03.491 INFO  [Computation edt_0_0] j.d.n.s.c.c.BackgroundComputationController Updating idle timeout for F6SaSrQ2TuKBg9OvpaAjfP(ANFIAouVqBeuSizaLr2WUX/eEgByq3DqF2WM75O1pSOkI) to -1
datalore-env-datalore-1  | 09:56:03.640 INFO  [Computation edt_1_1] j.d.n.s.c.c.BackgroundComputationController Updating idle timeout for c1lvwfYQ4gTTnJcONAWg02(P5QjKmi2fC6bXqIwo3ianK/irKFc6umycNAbZmASQv69G) to -1
datalore-env-datalore-1  | 09:56:03.653 INFO  [Computation edt_3_3] j.d.n.s.c.c.BackgroundComputationController Updating idle timeout for 0zTaWTK6jVItH1545GQwmA(ANFIAouVqBeuSizaLr2WUX/OJYwmCnBQEeF0ntNb9dJb8) to -1
datalore-env-datalore-1  | 09:56:03.656 INFO  [Computation edt_2_2] j.d.n.s.c.c.BackgroundComputationController Updating idle timeout for Ogie9kyUJTnJfh8U0Xdaud(P5QjKmi2fC6bXqIwo3ianK/JkGt4TqadydcnSa8bx4VHi) to -1
datalore-env-datalore-1  | 09:56:03.656 INFO  [Computation edt_4_4] j.d.n.s.c.c.BackgroundComputationController Updating idle timeout for hGMYnhchA3jL3hPHbj4Pdz(ANFIAouVqBeuSizaLr2WUX/AbyRODYdzTPinIEUo8znbL) to -1
datalore-env-datalore-1  | 09:56:03.668 INFO  [Com

As a sysadmin, I need to release the server resources (RAM, etc.) for other tasks. How can I force close these notebooks without asking the users?

I figured it out.

You need to stop the underlying Docker containers, named basic-agent.

To close all Datalore notebook instances:

docker stop $(docker ps -a -q --filter name=basic-agent --format="{{.ID}}")

If you have dozens of them running does wonders for your RAM.