how can I upgrade from version 11.04 to a newer one?
1520
How to install software or upgrade from an old unsupported release?
31506
How do I update Ubuntu manually?
5882
How to upgrade Ubuntu from an ISO image
11556
Can I smoothly upgrade from one LTS to next LTS release?
43778
Is it possible to "upgrade" from a 32bit to a 64bit installation?
59088
How to upgrade to a newer release of Ubuntu using the Live CD?
75798
How to upgrade to the latest GNOME version?
4309
How can I download an older version of OS X/macOS?
19288
Update manager doesn't offer an upgrade to the new release
2136
How to roll back Ubuntu to a previous version?
114492
How can I upgrade from Mac OS X Tiger 10.4?
68614
Is it possible to install an old version of Mac OS on a new Mac?
421
How do I update a Drupal distribution to a newer version?
113056
How to upgrade from 12.04 to 12.10 using CD?
554
Cannot Upgrade Xcode 11 to Xcode 11.1
45553
How do I install the latest stable version of Firefox?
43279
Alternative Method to Acquire El Capitan Upgrade