Tamal

$ # Use Live CD to boot
$ sudo su # Switch to root
$ fdisk -l # Get names of root, boot & EFI partition names. you can also use blkid
$ mount /dev/mapper/fedora_localhost--live-root /mnt  # mount root partition
$ cat /mnt/etc/fedora-release
Fedora release 31 (Thirty One)
$ mount /dev/nvme0n1p2 /mnt/boot  # mount boot partition
$ mount /dev/nvme0n1p1 /mnt/boot/efi  # mount EFI partition
# Note: If you are not able to mount EFI partition ('Input/Output error'),
# You may have to repair ESP file system or format ESP.

kdev33

TOC

Basic

Shortcuts

File & Folder Manipulation

Directory & Navigation

Jobs

I/O Redirection

SSH

Network

User and Group

reillysiemens

Signing VirtualBox Kernel Modules

These are the steps I followed enable VirtualBox on my laptop without disabling UEFI Secure Boot. They're nearly identical to the process described on [Øyvind Stegard's blog][blog], save for a few key details. The images here are borrowed from the [Systemtap UEFI Secure Boot Wiki][systemtap].

1. Install the VirtualBox package (this might be different for your platform).

   src='https://download.virtualbox.org/virtualbox/rpm/fedora/virtualbox.repo'

ricardojba

::##########################################################################################################################
::
:: This script can ruin your day, if you run it without fully understanding what it does, you don't know what you are doing,
::
::                             OR BOTH!!!
:: 
::                     YOU HAVE BEEN WARNED!!!!!!!!!!
:: 
:: This script is provided "AS IS" with no warranties, and confers no rights.
:: Feel free to challenge me, disagree with me, or tell me I'm completely nuts in the comments section, 

jmbjorndalen

#!/usr/bin/env python3
# Combining coroutines running in an asyncio event loop with 
# blocking tasks in thread pool and process pool executors.
# 
# Based on https://pymotw.com/3/asyncio/executors.html, but this version runs both
# threads and processes at the same time and interleaves them with asyncio coroutines.
# 
# All appears to be working. 
#

nipunsadvilkar

Formats

Python docstrings can be written following several formats as the other posts showed. However the default Sphinx docstring format was not mentioned and is based on reStructuredText (reST). You can get some information about the main formats in that tuto.

Note that the reST is recommended by the PEP 287

There follows the main used formats for docstrings.

- Epytext

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD