darmawan01

# fix wrong driver
echo '{ "storage-driver": "devicemapper" }' | sudo tee /etc/docker/daemon.json
sudo systemctl restart docker.service

# fix aliyun buggy selinux
sudo sed -i 's/SELINUXTYPE=mcs/SELINUXTYPE=targeted/' /etc/selinux/config

Ref: coreos/bugs#2340 (comment)

darmawan01

import 'dart:async';

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

class CustomToast {
  static OverlayEntry _overlayEntry;
  static OverlayEntry _overlayEntry1;
  static bool isVisible = false;
  static Timer _timer;

darmawan01

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

darmawan01

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

darmawan01

Example

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

Chekc log

tail -f out.log

darmawan01

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)

darmawan01

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

/*
Pager usage is off.
*/

-- find an object name by id

SELECT OID, relname

darmawan01

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>

darmawan01

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');

darmawan01

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);