Как установить Расширение Redis PHP 5.6 в Ubuntu 14

Раньше мы устанавливали расширение PHP Redis с помощью PECL. Но похоже, что PECL отказался от поддержки этого для версий PHP ниже 7.0. Как лучше всего сделать это без PECL? У нас Ubuntu 14.x с PHP 5.6

ubuntu@box776:~$ pecl help version
PEAR Version: 1.10.1
PHP Version: 5.6.18
Zend Engine Version: 2.6.0
Running on: Linux box776.localdomain 3.13.0-86-generic #131-Ubuntu SMP Thu May 12 23:33:13 UTC 2016 x86_64

Обновление 1

$ sudo apt-get install php5-redis

Reading package lists... 0%
Reading package lists... 0%
Reading package lists... 0%
Reading package lists... 0%
Reading package lists... 0%
Reading package lists... 0%
Reading package lists... 41%
Reading package lists... Done


Building dependency tree... 50%
Building dependency tree       


Reading state information... Done

The following package was automatically installed and is no longer required:
  os-prober
Use 'apt-get autoremove' to remove it.
The following NEW packages will be installed:
  php5-redis
0 upgraded, 1 newly installed, 0 to remove and 59 not upgraded.
Need to get 105 kB of archives.
After this operation, 359 kB of additional disk space will be used.


0% [Working]Get:1 http://archive.ubuntu.com/ubuntu/ trusty/universe php5-redis amd64 2.2.4-1build2 [105 kB]

13% [1 php5-redis 14.2 kB/105 kB 13%]Fetched 105 kB in 0s (264 kB/s)
Selecting previously unselected package php5-redis.
(Reading database ... 
(Reading database ... 10%
(Reading database ... 25%
(Reading database ... 40%
(Reading database ... 303857 files and directories currently installed.)
Preparing to unpack .../php5-redis_2.2.4-1build2_amd64.deb ...
Unpacking php5-redis (2.2.4-1build2) ...
Setting up php5-redis (2.2.4-1build2) ...
php5_invoke: Enable module redis for apache2 SAPI
php5_invoke: Enable module redis for cli SAPI

Кажется, все идет гладко, но затем composer install говорит:

$ composer install --no-interaction

You are running composer with xdebug enabled. This has a major impact on runtime performance. See https://getcomposer.org/xdebug
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - The requested PHP extension ext-redis * is missing from your system. Install or enable PHP's redis extension.


composer install --no-interaction returned exit code 2

Action failed: composer install

Обновление 2

Я SSH зашел в окно и выполнил ту же команду ...

ubuntu@box776:~$ apt-get install php5-redis
E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?
ubuntu@box776:~$ sudo apt-get install php5-redis
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following package was automatically installed and is no longer required:
  os-prober
Use 'apt-get autoremove' to remove it.
The following NEW packages will be installed:
  php5-redis
0 upgraded, 1 newly installed, 0 to remove and 59 not upgraded.
Need to get 105 kB of archives.
After this operation, 359 kB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu/ trusty/universe php5-redis amd64 2.2.4-1build2 [105 kB]
Fetched 105 kB in 0s (274 kB/s)
Selecting previously unselected package php5-redis.
(Reading database ... 303857 files and directories currently installed.)
Preparing to unpack .../php5-redis_2.2.4-1build2_amd64.deb ...
Unpacking php5-redis (2.2.4-1build2) ...
Setting up php5-redis (2.2.4-1build2) ...
php5_invoke: Enable module redis for apache2 SAPI
php5_invoke: Enable module redis for cli SAPI

Интересно, не хватает ли мне этих двух последних строк? Это говорит мне о том, что мне нужно предпринять дополнительные шаги для «включения модуля redis»?