Ubuntu 18.04 - Following packages have unmet dependencies: php7.2-fpm: ... How to solve this error?

I have found an answer:

Following this post, I just did:

• sudo add-apt-repository ppa:ondrej/php
• sudo apt update
• sudo apt install apt-transport-https lsb-release ca-certificates
• sudo wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
• sudo sh -c 'echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" > /etc/apt/sources.list.d/php.list'
• sudo apt update
• dpkg -l | grep php | tee packages.txt (check the content)
• sudo apt install php7.2 php7.2-common php7.2-cli php7.2-fpm (install the basic)

Then

php -v
PHP 7.2.24-1+ubuntu18.04.1+deb.sury.org+1 (cli) (built: Oct 24 2019 18:29:11) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies

And I still have my projects working with php7.1 and the new 7.2.

ila@ila:/etc/php$ ll
total 24
drwxr-xr-x   4 root root  4096 Nov 21 12:24 ./
drwxr-xr-x 161 root root 12288 Nov 21 12:14 ../
drwxr-xr-x   5 root root  4096 Jul 26  2018 7.1/
drwxr-xr-x   5 root root  4096 Nov 21 12:24 7.2/
ila@ila:/etc/php$ tree 7.2/
7.2/
├── cli
│   ├── conf.d
│   │   ├── 10-opcache.ini -> /etc/php/7.2/mods-available/opcache.ini
│   │   ├── 20-json.ini -> /etc/php/7.2/mods-available/json.ini
│   │   └── 20-readline.ini -> /etc/php/7.2/mods-available/readline.ini
│   └── php.ini
├── fpm
│   ├── conf.d
│   │   ├── 10-opcache.ini -> /etc/php/7.2/mods-available/opcache.ini
│   │   ├── 20-json.ini -> /etc/php/7.2/mods-available/json.ini
│   │   └── 20-readline.ini -> /etc/php/7.2/mods-available/readline.ini
│   ├── php-fpm.conf
│   ├── php.ini
│   └── pool.d
│       └── www.conf
└── mods-available
    ├── json.ini
    ├── opcache.ini
    └── readline.ini

6 directories, 13 files

Or install some available modules

sudo apt install -y php7.2-bz2 php7.2-common php7.2-cgi php7.2-cli php7.2-dba php7.2-dev libphp7.2-embed php7.2-bcmath php7.2-fpm php7.2-gmp php7.2-mysql php7.2-tidy php7.2 php7.2-sqlite3 php7.2-json php7.2-opcache php7.2-sybase php7.2-curl php7.2-ldap php7.2-phpdbg php7.2-imap php7.2-xml php7.2-xsl php7.2-intl php7.2-zip php7.2-odbc php7.2-mbstring php7.2-readline php7.2-gd php7.2-interbase php7.2-snmp php7.2-xmlrpc php7.2-soap php7.2-pspell php7.2-pgsql php7.2-enchant php7.2-recode

If you getting error like php7.2 php7.2-curl libapache2-mod-php doesn't have installable candidate or not locate any package or dependencies is php7.2-common Or libcurl3 Do this . Remeber Change your package name as per your requirements

You have to tackle in mature way. Install aptitude these ubuntu package manager will finds all dependencies, and will install one by one.

apt-get install aptitude

Now you have to check if aptitude can download it or not if download it follow instructions

sudo aptitude install php7.2-curl

If you have gotten any error like this

E: Unable to locate package php7.2-curl
E: Couldn't find any package by glob 'php7.2-curl'

Any type on error i'm not talking about proper these errors

Try to add php package again

sudo apt-add-repository ppa:ondrej/php

sudo apt-get update

Now try this command

sudo aptitude install php7.2-curl

Aptitude will ask you you want to keep current version of all dependencies

The following actions will resolve these dependencies:

     Keep the following packages at their current version:
1)     php7.2-curl [Not Installed]                        



Accept this solution? [Y/n/q/?]

Type n then Enter

Aptitude will find all dependencies and ask you to install all package type

y

Again

y

Then

systemctl restart apache2

For centos of rhel

systemctl restart httpd

It will Not enabling PHP 7.2 FPM by default. NOTICE: To enable PHP 7.2 FPM in Apache2 do

a2enmod proxy_fcgi setenvif

a2enconf php7.2-fpm

This method is not only for this error you can find any of php apache2 or ubuntu system package solution using aptitude.

Upvote if you find your solution