smac89

The following is a function I use in my .zshrc file to achieve some form of lazy evaluation.

local function lazy_load() {
    local -xr thunk="$(cat)"
    # (u) removes duplicates
    local -xr triggers=(${(u)@})
    
    # Only if length of triggers is greater than zero
 # otherwise the function will immediately execute.

smac89

To create the timer described here

systemd-run --on-calendar='*-*-01 12:00:00' --unit='unbound-root-hints' \
--remain-after-exit --description='Update root hints for unbound' --property='Type=exec' \
--property='After=network.target' --timer-property='Persistent=true' \
--timer-property='RandomizedDelaySec=2s' --timer-property='AccuracySec=1us' \
/usr/bin/curl -o /etc/unbound/root.hints https://www.internic.net/domain/named.cache

smac89

Being a Linux desktop user is not easy, but it doesn't have to be difficult.

Enabling persistent journals

This is especially useful for collecting logs of system issues.

• Edit /etc/systemd/journald.conf and set Storage=persistent
• See https://wiki.archlinux.org/index.php/Systemd/Journal
• Useful command for viewing logs from the previous boot:

smac89

Find field references on an instance

In this example, we want to find places where one did:

someClass.someField

Where someClass is of the type fully.qualified.SomeClass

Find and replace field reference with method call

smac89

Downloading teamspeak

Since the server will likely not have a UI, so the download must be done with a command

The command to download teamspeak (Find the most recent version and download instead):

wget -O teamspeak-server.tar.bz2 http://dl.4players.de/ts/releases/3.0.13.8/teamspeak3-server_linux_amd64-3.0.13.8.tar.bz2

Setting up teamspeak folder

smac89

Server

Create the user group and add the users you want to be part of this group:

sudo groupadd sshusers
sudo usermod -a -G sshusers <username>

Client

# Generate key and create password

smac89

import java.util.List;
import java.util.stream.IntStream;
import java.util.stream.Stream;

public class Main {
    public static void main(String args[]) {
        Stream<List<Integer>> stream = SlidingWindow.pagedStream(StreamableSupplier.fromStream(IntStream.range(1, 10000).boxed()), 5)
            .apply(i -> i <= 100);

        stream.forEach(System.out::println);

smac89

import com.google.common.io.Resources;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonObject;

import java.io.IOException;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.stream.Stream;

smac89

Howto

Install these packages

sudo apt-get install gnome-raw-thumbnailer ufraw-batch

Check to see if everything works, and your thumbnails show up. If not, try the next part.

smac89

def _gen_private_pem_key():
    from cryptography.hazmat.backends import default_backend as crypto_default_backend
    from cryptography.hazmat.primitives.asymmetric import rsa
    key = rsa.generate_private_key(
        backend=crypto_default_backend(),
        public_exponent=65537,
        key_size=2048
    )
    return key