Devices with cgroup v2
I was curious to find out how containers have restricted access to devices. For cgroup v1 this is simple, but cgroup v2 uses eBPF. Find out what device access a container has with 3 easy and 1 difficult steps.
Tag: Linux
Linux Memory Statistics
What does Used memory in Linux actually mean and how this concept has changed over the years.
Changing Grafana Legends
A quick tour of label_replace to fix Legend texts in Grafana for Prometheus data sources.
Percent CPU for processes
The ps program gives a snapshot of the processes running on your Unix-like system. On most Linux installations, this will be the ps program from the procps project. What does the %CPU field mean in the output of ps?
25 Years of Free Software
When did I start writing Free Software, now called Open Source? That’s a tricky question. Does the time start with the first […]
Sending data in a signal
The well-known kill system call has been around for decades and is used to send a signal to another process. The most […]
procps-ng 3.3.16
procps-ng version 3.3.16 was released today. Besides some documentation and library updates, there were a few incremental changes. Zombie Hunting with pgrep […]
psmisc 23.0
I had to go check but it has been over 3 years since the last psmisc release back in February 2014. I […]
The sudo tty bug and procps
There have been recent reports of a security bug in sudo (CVE-2017-1000367) where you can fool sudo into thinking what controlling terminal […]
Displaying Linux Memory
Memory management is hard, but RAM management may be even harder. Most people know the vague overall concept of how memory usage […]