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Installing and running shadowsocks on Ubuntu Server

16.10 yakkety and above

1. Install the the shadowsocks-libev package from apt repository.

    sudo apt update
    sudo apt install shadowsocks-libev
   

2. Save ss.json as /etc/shadowsocks-libev/config.json.

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Common OpenSSL Commands with Keys and Certificates

Generate RSA private key (2048 bit)

openssl genrsa -out private.pem 2048

Generate a Certificate Signing Request (CSR)

openssl req -sha256 -new -key private.pem -out csr.pem

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Read Scheduler Config

curl -sS --header "X-Nomad-Token: $NOMAD_TOKEN" "$NOMAD_ADDR/v1/operator/scheduler/configuration" | jq .

Sample Output

{

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If you don't like or need the kdc process on Mac OS X, which opens TCP port 88 to the world, you can disable it with launchctl.

Disable:

sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.Kerberos.kdc.plist

Enable:

sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.Kerberos.kdc.plist

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Remove / Uninstall packages marked ‘rc’ on Debian / Ubuntu.

While checking the status of packages using dpkg, it is possible to see a ‘rc’ state for some unused packages, this corresponds to:

• r: the package was marked for removal
• c: the configuration files are currently present in the system

In other words: the package is not completely removed (config files are still present), but not installed anymore (and obviously not used).

To see a list of packages marked as ‘rc’:

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Building Unreal Engine Game Client and Dedicated Server on Linux

Because the build tools of UE4 works across platforms (Windows, Mac OS, Linux), steps in this article can be applied to Mac OS and Windows as well.

On Windows, You need to replace RunUAT.sh with RunUAT.bat though.

Prerequisites

First, get Unreal Engine 4 sourcecode and export the following environment variables:

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Copy ssserver.service to under /lib/systemd/system/ and run:

sudo systemctl enable ssserver
sudo systemctl start ssserver

sudo systemctl status ssserver

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tar czfv NEW_NAME.tar.gz OLD_NAME --transform s/OLD_NAME/NEW_NAME/

Note: this only works with GNU Tar.

Example

we want to tar /opt/zlib/1.2.11 into zlib-1.2.11.tar.gz, and we want the top-level folder inside that tar.gz file to be zlib-1.2.11, not 1.2.11:

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Use the --ignore-application-stop-failures option with the AWS CLI tool while doing the deployment:

aws deploy create-deployment --application-name APPLICATION --deployment-group-name GROUP --ignore-application-stop-failures --s3-location bundleType=tar,bucket=BUCKET,key=KEY --description "Ignore ApplicationStop failures due to broken script"

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#!/bin/bash

set -e

SALT_VERSION='3002'

if [ -z "$1" ]; then
    echo 'Please run this script with argument <salt-master address>'
    exit 1
fi