p2ndemic

XDG - Base Directory Specification

Directories

Base

The intended use-case for BaseDirectories is to query the paths of user-invisible standard directories that have been defined according to the conventions of the operating system the library is running on.

Linux Performance Tweaks

List of Linux networking tools

netstat (ss)

Displays contents of /proc/net files. It works with the Linux Network Subsystem, it will tell you what the status of ports are ie. open, closed, waiting, masquerade connections. It will also display various other things. It has many different options. Netstat (Network Statistic) command display connection info, routing table information etc. To displays routing table information use option as -r.

Sample output:

Proto Recv-Q Send-Q  Local Address          Foreign Address        (state)    
tcp4 0 0 127.0.0.1.62132 127.0.0.1.http ESTABLISHED

	~/Downloads/ffmpeg-4.1.5 $ ./configure --help
	Usage: configure [options]
	Options: [defaults in brackets after descriptions]

	Help options:
	--help print this message
	--quiet Suppress showing informative output
	--list-decoders show all available decoders
	--list-encoders show all available encoders
	--list-hwaccels show all available hardware accelerators

	#!/bin/sh

	# Set kernel parameters in /etc/sysctl.conf
	cat << EOF > /etc/sysctl.conf
	# Increase maximum number of open file descriptors
	fs.file-max = 1000000

	# Increase maximum number of inotify instances per user
	fs.inotify.max_user_instances = 8192

	# IPv6 Configuration
	# -> note that I have disabled ip6 for our internet-connection (wan/eth0) because
	# -> my upstream/ISP (still) does not do IPv6. The rest, even localhost, does ip6 stuff.
	net.ipv6.conf.all.disable_ipv6 = 0
	net.ipv6.conf.default.disable_ipv6 = 0
	net.ipv6.conf.lo.disable_ipv6 = 0
	net.ipv6.conf.eth0.disable_ipv6 = 1
	net.ipv6.conf.wan.disable_ipv6 = 1

	# Packet Forwarding