ctop

ctop [options]

ctop will help you see what’s going on at the container level. Basically, containers are a logical group of processes isolated using kernel’s cgroups and namespaces. Recently, they have been made popular by Docker and they are also heavily used under the hood by systemd and a load of container tools like lxc, rocket, lmctfy and many others.

Under the hood, ctop will collect all metrics it can from cgroups in realtime and render them to instantly give you an overview of the global system health.

It currently collects metrics related to cpu, memory and block IO usage as well as metadata such as owning user (mostly for systemd based containers), uptime and attempts to guess the container managing technology behind.

-h, --help

show this help message and exit

--tree

show tree view by default

--refresh=REFRESH

Refresh display every <seconds>

--follow=FOLLOW

Follow cgroup path

--fold=FOLD

Fold cgroup sub tree

--columns=COLUMNS

List of optional columns to display. Always includes ‘name’

--sort-col=SORT_COL

Select column to sort by initially. Can be changed dynamically.

This manual page was written by ChangZhuo Chen <czchen@debian.org> for the Debian GNU/Linux system (but may be used by others).