lab 2.1 echo: write error: No such process
Hi there,
When trying to do the lab 2.1, I'm stuck at the part when we are supposed to enter:
student@ubuntu:/sys/fs/cgroup/freezer/mycgroup$ sudo bash -c 'echo 20913 >>tasks'
I get the following error:
echo: write error: No such process
I have tried several times, by opening and closing a new terminal window or a new terminal tab, then entering the corresponding PID number, and I always get the same error. I had no problem following along up until here.
Comments
-
Please provide the following commands and their respective outputs:
First terminal
student@ubuntu:/sys/fs/cgroup/freezer/mycgroup$ cat tasks
Second terminal
student@ubuntu:~$ ps
First terminal
student@ubuntu:/sys/fs/cgroup/freezer/mycgroup$ sudo bash -c 'echo PID >> tasks'
by replacing the PID with the value you are using to write into the tasks file.Regards,
-Chris0 -
student@ubuntu:/sys/fs/cgroup/freezer/mycgroup$ cat task
student@ubuntu:~$ ps
PID TTY TIME CMD
13860 pts/1 00:00:00 bash
13872 pts/1 00:00:00 psstudent@ubuntu:/sys/fs/cgroup/freezer/mycgroup$ sudo bash -c 'echo PID >> tasks
Now it worked ... I dont know why. Sorry for the inconvenience
0 -
I had the same issue, I realized the tasks file does not exist, and I´m not able to create it.
0 -
Hi @dalbaran,
Can you provide a screenshot of the commands you run to populate and/or create the tasks file and their respective outputs showing errors?
Regards,
-Chris0
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