(from http://www.metabrew.com/article/a-million-user-comet-application-with-mochiweb-part-1)
Save yourself some time and tune the kernel tcp settings before testing with lots of connections, or your test will fail and you’ll see lots of Out of socket memory messages (and if you are masquerading, nf_conntrack: table full, dropping packet.)
Here are the sysctl settings I ended up with - YMMV, but these will probably do:
$ cat /etc/sysctl.conf
# General gigabit tuning:
net.core.rmem_max = 16777216
| #! /usr/local/bin/bash | |
| # | |
| # Calomel.org | |
| # https://calomel.org/zfs_health_check_script.html | |
| # FreeBSD 9.1 ZFS Health Check script | |
| # zfs_health.sh @ Version 0.15 | |
| # Check health of ZFS volumes and drives. On any faults send email. In FreeBSD | |
| # 10 there is supposed to be a ZFSd daemon to monitor the health of the ZFS | |
| # pools. For now, in FreeBSD 9, we will make our own checks and run this script |
| -- This script can be used in conjunction with Better Touch Tool to display the currently playing track on the MacBook Pro TouchBar | |
| -- More info here: https://lucatnt.com/2017/02/display-the-currently-playing-track-in-itunesspotify-on-the-touch-bar | |
| if application "iTunes" is running then | |
| tell application "iTunes" | |
| if player state is playing then | |
| return (get artist of current track) & " - " & (get name of current track) | |
| else | |
| return "" | |
| end if |
/etc/ufw/applications.d/plexmediaserver
[plexmediaserver]
title=Plex Media Server (Standard)
description=The Plex Media Server
ports=32400/tcp|3005/tcp|5353/udp|8324/tcp|32410:32414/udp
[plexmediaserver-dlna]
title=Plex Media Server (DLNA)
description=The Plex Media Server (additional DLNA capability only)
Setup full disk encryption using LVM on LUKS (single drive) with remote SSH for an already setup/running Raspbian stretch system. Using this guide there is no need to connect a screen or keyboard to the rpi at any stage since we will setup remote SSH at the same time (at present no other guides available tell you that this is possible).
To be safe, backup SD card (using another computer is easiest in my case):
sudo dd bs=4M if=/dev/<rpi_sdcard> | gzip > rpibackup.img.gz
or use my fish shell function.
| head -1 example.torrent | grep -aoE '6:lengthi[0-9]+' | cut -di -f2 | awk '{s+=$1} END {print s}' |
| rsync -rtvzplogDH --numeric-ids --exclude=/etc/fstab --exclude=/etc/network/* --exclude=/proc/* --exclude=/tmp/* --exclude=/sys/* --exclude=/dev/* --exclude=/mnt/* --exclude=/boot/* /* root@$DESTINATION_HOST:/ |
| #!/usr/bin/env python3 | |
| import json | |
| import subprocess | |
| import sys | |
| from concurrent.futures import ThreadPoolExecutor | |
| import html | |
| import dictdiffer | |
| import iso8601 |