نویسنده: m.javidi

sudo pacman -Syy archlinux-keyring
sudo pacman-key --populate archlinux

version: '3.7'

# Services
services:

  # Nginx Service
  nginx:
    image: nginx:latest
    ports:
      - 80:80
    volumes:
      - ./:/var/www/php
      - ./.docker/nginx/conf.d:/etc/nginx/conf.d
    depends_on:
      - php
  
  # PHP Service
  php:
    image: php-fpm
    build: ./.docker/php
    working_dir: /var/www/php
    volumes:
      - ./:/var/www/php
    depends_on:
      - mysql

  # MySQL Service
  mysql:
    image: mysql
    ports:
      - 3306:3306
    volumes:
      - ./.docker/mysql/my.cnf:/etc/mysql/conf.d/my.cnf
      - ./.docker/mysqldata:/var/lib/mysql
    environment:
      MYSQL_ROOT_PASSWORD: toor

1. Clean package cache:
$ sudo pacman -Sc

2.Remove unused packages:
$ sudo pacman -Rns $(pacman -Qdtq)

3.Fully remove a Package with unrequire dependencys
$ sudo pacman -Rns PAK_NAME

4. get list of package with description
```
for package in $(pacman -Qetq); do
    description=$(expac -S '%d' $package)
    echo "$package: $description"
done > explicitly_installed_packages_with_descriptions.txt
```
5. get pack with dependencys (as tree)
$ for package in $(pacman -Qetq); do pactree $package; done

6. for check package and dependenci status of a package:
```
pacman -Qi PAC_NAME
```
7. List of installed package sorted:
```
grep "installed" /var/log/pacman.log | awk '{print $1, $2, $4}' | grep -Ff <(pacman -Qqe) | sort
```

Error :

$ sudo pacman -Syu                                                     130 (01:59.904) < 07:38:10
:: Synchronizing package databases...
error: failed to update core (unable to lock database)
error: failed to update extra (unable to lock database)
error: failed to update community (unable to lock database)
error: failed to update multilib (unable to lock database)
error: failed to update archlinuxfr (unable to lock database)
error: failed to synchronize all databases

-------------------------------------------------------------
Solution :

$ sudo rm /var/lib/pacman/db.lck

// Use function on page Without use return
function once_alert() {
  // Create variable for check alert status in browser
	var alertset = localStorage.getItem('alertset') || '';
	// if value not set in browser > local storage - run alert
  if (alertset != 'yes') {
    // write alert message in "txt"
		var txt = "Write once alert";
		alert(txt);
		localStorage.setItem('alertset','yes');
	}
}
//# My Edition From :
//# Reference : https://stackoverflow.com/questions/24768067/display-alert-only-once