Sam sammcj

optimising-unifi-performance

NOTE: Content below is written by Adrian Mace. Click here for an updated version.

Below are the key settings that I apply on any unifi installation for optimal performance.

Settings

Settings > Site

Ensure Enable Advanced Features is enabled
This allows you to follow along with the guide in it's entirety.

Getting the Gist of GitHub Actions

Tutorial and tips for GitHub Actions workflows

Building GCC 9.2.0 on CentOS 7

Introduction

CentOS 7 distribution (as well as RHEL 7) ships with a somewhat outdated version of the GCC compiler (4.8.5 on CentOS 7.5), which may not be suitable to your compilation requirements. For example, C11 - which supersedes C99 - is fully supported only starting from GCC 4.9).

Additionally, recent versions of GCC (GCC6, GCC7, GCC8, GCC9) come with improvements which help detect issues at build time and offer suggestions on how to fix them. Sometimes, these are even actually helpful!

This note describes how to build the latest GCC (9.2.0 as of October 2019) from sources on CentOS 7. This should be applicable as is on RHEL 7. For other Linux distributions, adapt as needed.

Problem

When I use docker to work with the shared workspace with host under Ubuntu, I find that files created by docker user is owned by root. This is not the same with macOS.

Maybe this is becuase docker is run by root user and the default user mapping mechanism is to map container-root to host-user or host-root. So can I map the container-root or container-any-user to host-current-user?

Fortunately the latest docker supports the re-map the container user to any host user via Linux namespace. Refer to this.

	[server]
	host: 0.0.0.0
	port: 7125
	enable_debug_logging: False

	[file_manager]
	config_path: ~/klipper_config
	log_path: ~/klipper_logs

	[data_store]

	## Where to find info and how to report on system extensions in macOS Catalina+

	# Staged system extensions location in folder based on unique ID
	/Library/SystemExtensions/

	# Info on each
	/Library/SystemExtensions/db.plist
	Includes...
	- state (enabled, activated, etc.)
	- associated launchd plists

	$ # 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.

	#!/bin/sh

	# Set the macOS installer path as a variable
	MACOS_INSTALLER="/Applications/$(ls /Applications \| grep "Install macOS")"
	MOUNT_POINT="$MACOS_INSTALLER/Contents/SharedSupport"
	echo "macOS installer is \"$MACOS_INSTALLER\""

	# Set the target disk as a variable
	TARGET=$(diskutil info "$(bless --info --getBoot)" \| awk -F':' '/Volume Name/ { print $2 }' \| sed -e 's/^[[:space:]]*//')
	echo "Target disk is \"$TARGET\""

	#!/bin/sh

	# This script checks if a go-pear.phar is the same as one of the
	# ones released on https://github.com/pear/pearweb_phars
	#
	# MIT License
	# Made by Michele Locati <[email protected]> on 2019-01-23

	set -o errexit
	set -o nounset