NOTE: php5.4 and php5.6 is no longer supported. https://www.mojowill.com/geek/howto-install-php-5-4-5-5-or-5-6-on-centos-6-and-centos-7/

NOTE: php5.6 and php7.0 is no longer supported. 1wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm 2wget http://rpms.remirepo.net/enterprise/remi-release-7.rpm 3rpm -Uvh remi-release-7.rpm epel-release-latest-7.noarch.rpm Then, enable "remi-php70" in /etc/yum.repos.d/remi-php70.repo …

In our example, we have Debian Squeeze (6.0) and it's been unsupported since Feb 2016. We can no longer install nor update the packages until you point it to another source...the archives. So, in /etc/apt/sources.list, add you will see: 1deb http://ftp.us.debian.org/debian/ squeeze main 2deb-src …

1do-release-upgrade See https://help.ubuntu.com/lts/serverguide/installing-upgrading.html

1apt-get install --only-upgrade <packagename> See details in https://askubuntu.com/questions/44122/how-to-upgrade-a-single-package-using-apt-get

1sudo apt-get remove python-openssl 2curl -o ./get-pip.py https://bootstrap.pypa.io/get-pip.py 3sudo python2 ./get-pip.py Replace with yum if in RH-based OS. See https://stackoverflow.com/questions/43267157/python-attributeerror-module-object-has-no-attribute-ssl-st-init for details.