Debugging the BPF Virtual Machine Lorenzo Fontana October 28, 2020 ● Debugging is useful to understand how things work ● Sometimes, eBPF programs can’t even load ● I couldn’t find good resources on this this, so, here I am ● I break lots of eBPF programs ● The BPF Virtual machine is not easy to understand Why ? The BPF subsystem lives in the kernel AND The kernel can be debugged using gdb The

install/netboot-arm64 arm64 netboot install 3 install/netboot-ppc64el ppc64el netboot install 3 install/ppc64el Virtual CDROM and Petitboot on ppc64el 1 Level Path Navlink 3 install/s390x-zvm s390x install via z/VM Security tips 3 wireguard-vpn-troubleshooting Troubleshooting 2 Virtualisation and containers 3 Virtual machines 4 virtualization-qemu QEMU 4 virtualization-multipass Multipass 4 virtualization-uvt UVtool Navlink 3 troubleshooting-tls-ssl Troubleshooting TLS/SSL 2 Virtualisation and containers 3 Virtual machines 4 vm-tools-in-the-ubuntu-space VM tools overview 4 using-qemu-for-microvms QEMU for microVMs

program. The Live Server installer uses a text-based console interface which runs on the default virtual console. The interface can be entirely driven by the enter, up and down arrow keys (with some occasional system with Landscape: Landscape is a paid service provided by Canonical to help manage your Ubuntu machines. See the Landscape8 site for details. 7 http://www.ubuntu.com/download/server/download 8 http://landscape Java server: Installs Apache Tomcat and needed dependencies. • Virtual Machine host: Includes packages needed to run KVM virtual machines. • Manually select packages: Executes aptitude allowing you to

openEuler WHITE PAPER openEuler 21.03 Technical White Paper Kernel Innovations Physical Machines To install openEuler on a physical machine, check that the physical machine meets the compatibility openEuler compatibility list at https://openeuler.org/en/compatibility/. Virtual Machines openEuler supports the following virtual machines (VMs): 1. centos 7.9 qemu 1.5.3-175.el7 libvirt 5.0.0-1.el7 2 Enhanced ARM64 kdump: Memory reservation for addresses greater than 4 GB enables kdump to support machines with larger memory. 20. Raspberry PI: The openEuler 21.03 kernel natively supports the Raspberry

3 Apache Virtual Host documentation 109 3.1 Apache Virtual Host documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 iii iv CONTENTS 3.2 Name-based Virtual Host Support . . . . . 111 3.3 Apache IP-based Virtual Host Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 3.4 Dynamically Configured Mass Virtual Hosting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 3.6 An In-Depth Discussion of Virtual Host Matching . . . . . . . . . . . . . . . . . . . . . . . . . . 129 3.7 File Descriptor Limits

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 493 10 Virtual machine monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503 2 Virtual machine discovery key fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . environment. Web monitoring should help you learn how to monitor the availability of web sites. Virtual machine monitoring presents a how-to for configuring VMware environment monitoring. Maintenance

Debian sys- tem. A wide range of hardware such as embedded devices, laptops, desktops and server machines is supported and a large set of free software for many purposes is offered. The installation is known as “flavors”. 架構 Debian 命名 子架構 風味 AMD64 & Intel 64 amd64 Intel x86-based i386 default x86 machines default Xen PV domains only xen ARM armel Marvell Kirkwood and Orion marvell ARM with hardware 4kc-malta Cavium Octeon octeon Loongson 3 loongson-3 Power Systems ppc64el IBM POWER8 or newer machines 64bit IBM S/390 s390x IPL from VM-reader and DASD generic This document covers installation for

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 496 10 Virtual machine monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506 2 Virtual machine discovery key fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . environment. Web monitoring should help you learn how to monitor the availability of web sites. Virtual machine monitoring presents a how-to for configuring VMware environment monitoring. Maintenance

configuration. Apache has the capability to serve many different websites simultaneously. This is called Virtual Hosting. Directives can also be scoped by placing them inside sections, so that they perfectly safe because this section will apply to all requests regardless of the specific URL. Virtual Hosts The container encloses directives that apply to specific hosts. This is useful hosts from the same machine with a different configuration for each. For more information, see the Virtual Host Documentation. Proxy The and containers apply enclosed configuration

configuration. Apache has the capability to serve many different websites simultaneously. This is called Virtual Hosting. Directives can also be scoped by placing them inside sections, so that they perfectly safe because this section will apply to all requests regardless of the specific URL. Virtual Hosts The container encloses directives that apply to specific hosts. This is useful hosts from the same machine with a different configuration for each. For more information, see the Virtual Host Documentation. Proxy The and containers apply enclosed configuration