Chapter 3 - Lab: cgroup
Hi,
i'm running the chapter 3 Labs and in the CGROUPS Lab section, I can't find the package cgroup-tools. The message received indicates that was unable to locate the cgroup-tools after apt install cgroup-tools. Could you help me?
BR,
Robson
Comments
-
Hi Robson,
As mentioned in earlier comment sometimes you might need to update the package index with following command to refresh the package list :-
$ apt update
Please run the above command and then try just installing "cgroups-tools" package.
Thanks for reporting the issues. May be we should to add "apt update" instruction before installing any packages on Ubuntu 16.04.
Thanks.
Neependra
1 -
Done and solved! Thanks Neependra!
Robson
0 -
Hi all,
I'm doing the cgroups part of the labs.
Come back to the previous terminal and, in the tasks file, append the PID which we got in previous step:
$ pwd
/sys/fs/cgroup/freezer/mycgroup$ echo 6664 >> tasks
The result of the "echo" is -->> "-bash: tasks: Permission denied". I tried with and without sudo.
I'm using my own Ubunty (not DigitalOcean) 16.04.6 LTS (Xenial Xerus) and 18.04.4 LTS (Bionic Beaver).It's Ok to freeze the process on my CentOS7 !
Probably the root of the issue is Ubuntu where it's impossible to work under root....
Could you help me to solve the issue.
Alexey0 -
Hi @AlexeyBY,
Here is a link which explains how to use
sudo
to run commands asroot
, and how to usesudo -i
to becomeroot
:
https://help.ubuntu.com/community/RootSudo
Once you becomeroot
, you should be able to run theecho ...
command.Another resource explains again how to run
echo
asroot
and withsudo
:
https://askubuntu.com/questions/230476/how-to-solve-permission-denied-when-using-sudo-with-redirection-in-bashGood luck!
-Chris0 -
for the command 'apt install -y cgroup-tools', what does the -y flag do?
0 -
Nevermind- found it. The -y option assumes yes to all prompts.
http://manpages.ubuntu.com/manpages/bionic/man8/apt-get.8.html0
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