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sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
sudo apt-get install postgresql-13 postgresql-13-postgis-3

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sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout server.key -out server.crt

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Example

./test.sh > out.log 2>&1 &

Chekc log

tail -f out.log

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f, err := ioutil.TempFile("", uuid+".*.pdf")
	if err != nil {
		log.Print("ioutil.TempFile(): ", err)
		return
	}

	// Write the body to file
	if _, err = io.Copy(f, buffReader); err != nil {
 log.Print("io.Copy(): ", err)

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-- turn off paging (less/more)
psql> \pset pager off

/*
Pager usage is off.
*/

-- find an object name by id

SELECT OID, relname

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SCP Over :

scp "ProxyCommand ssh <jumphost> -W %h:%p" <src> <dest>

RSYNC Over :

rsync -azv -P -e 'ssh -o "ProxyCommand ssh -A <jumphost> -W %h:%p"' <src> <dest>

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import 'package:intl/intl.dart';

/// An utility calss that manages specific formats.
class DateFormats {
  /// The [DateFormat] 'yyyy-MM-dd HH:mm:ss'.
  static final fullDateFormat = new DateFormat('yyyy-MM-dd HH:mm:ss');

  /// The [DateFormat] 'yyyy/MM/dd'.
  static final onlyDayDateFormat = new DateFormat('yyyy/MM/dd');

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import 'dart:ui';
import 'package:flutter/cupertino.dart';
import 'package:flutter/foundation.dart';

class CacheMemoryImageProvider extends ImageProvider<CacheMemoryImageProvider> {
  final String tag; //the cache id use to get cache
  final Uint8List img; //the bytes of image to cache

  CacheMemoryImageProvider(this.tag, this.img);

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{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "appname",
            "request": "launch",
            "type": "dart"
        },
        {
            "name": "Android",

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{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
  
    // Use `flutter devices` to get your devices id
    "version": "0.2.0",
    "configurations": [
        {
            "name": "appname",