https://launchpad.net/~ubuntu-mate-dev/+archive/ubuntu/trusty-mate These MATE 1.8.1 packages for *only* Ubuntu Trusty, they have been side ported from Debian. In order to correctly install and configure MATE 1.8.1 on Ubuntu Trusty you will also need to add the following PPA: * ppa:ubuntu-mate-dev/ppa Open a terminal complete the following steps to enable the appropriate PPAs and install MATE 1.8.1 on Ubuntu Trusty. sudo apt-add-repository ppa:ubuntu-mate-dev/ppa sudo apt-add-repository ppa:ubuntu-mate-dev/trusty-mate sudo apt-get update sudo apt-get upgrade sudo apt-get install --no-install-recommends ubuntu-mate-core ubuntu-mate-desktop deb http://repos.uclv.edu.cu/ubuntu-ppa/ubuntu-mate-dev/trusty-mate/ubuntu trusty main -----BEGIN PGP PUBLIC KEY BLOCK----- Version: SKS 1.1.5 Comment: Hostname: keyserver.ubuntu.com mQINBFOpdmgBEACsOSzjMdn9yHTUAXPewLp7mhe4EbutJH0qamWdzrJ5BRq14uMkxdCWYHPS ZweIpQzARTBPXCxWcLt5kD2iL5yC0mhaOaqx0vXBtNUBh1oeAo3EueahJUz+WMEYByBP9ToH ERhMmO7nMrngqjzpsAHbnlvQfMclyn7GLIOWg1ZYBURCTg7ckvEBPGjvgRZnzoCBs8u5MGif LcAotjDkuNTWeHN9mwaR8vlmTtu7Kv4uIilKvtDzwHEkqJktDew16JfvYCkdRzADf6TQr2Q1 xJrZ4pG5Wlwm6IT0hKTHYVfiYSirPx1f8UDYnQuukTLWgXnTAaSd2KMTbiiNvmbiB24/7c2T X60Z98sdWHL0zy1Qt405LQ3cwsFZUbOrUI9W9GP8Xc4s7Qc3SCiEzNMKpdAdVqg0J8EXdrCW D9dDoq6SPBKohKjJGAyJNuY2m0hFnBBPEBsTiLeuPyYKbOXdv/iRnzJDMnle1ObkP47o0aYB l7OjwV4MJJ26ALM6/0U2PZrj5eWPFcPzziSSPjnz+jbimTgm9LxtqpzAfBFTyI33NvLZz3kh 8NBVJVjmKXKz5eMOsHu4rJ4bLImWmskDoKvAHbFCzfn/0zNY71QzAJMqVKVsHiM7A06CP6LK 7R4pf5AWarx+ubOdLvzpeUeQvPn1knRXQoSDpiomha2ZLrOg3QARAQABtC5MYXVuY2hwYWQg UFBBIGZvciBVYnVudHUgTUFURSBSZW1peCBEZXZlbG9wZXJziQI4BBMBAgAiBQJTqXZoAhsD BgsJCAcDAgYVCAIJCgsEFgIDAQIeAQIXgAAKCRD7AcwmFiUG5wBsEACPDYibCREOPb2wSovh TD6pWnnRjgImLVvYB6tspb8kb4Xilji0WZvTccgrXj1Zj/81jrDU74croLq4EJyX78hk3X6f mk+qnKXbM7VO8OOUlgXy0g0tQLGOfXD8IHg85uycJYVKc31wDK1/GcSprUUtMymAkqh5B11j TSEv5ITxL+Lb38bqPYrgRS92T+oRI/PfnpYKgqSLEO2IYUMIwUsjs26jxT/PAwFhIaiVh0iU ZCVPmYLuWyy5JlwCfgv2AUVbkAZbrJAAYygtvjUdxqaJcXbSidc4CkUi/OZVE/2pmHRoehHL YgU6jPdy1T8OHNnhlAr5hicLi13wn7Ty2LsA4+b3lvQxRp/aG2HHOTKEUPueauE3H1dDtDw0 jbiCcJrfuYsLypB1AAe0Ka0s3HDq5Gq0/PTOGMM/wu2wKUGDwb8z4SQn3Nq/qmNaYEpktr5Z aYPjLI+vfLcjIjtJ5MqNwgrget744fNHMGtr/Ozb2uMlDLyr+zQ8YKHnfoPxvOn7n5xroPeL facY0SIUdEDJM+p/ocQRQ9zQCoWdihC0qsQrWXScOgD1z0oRWhI1tFd3hFsJU9o8KnSp7NBU IuPpHIQZkWXyc/aCvTD/OPz3UR/36MAJFapCxuLMY6tlXuZV/CGGxqwNw7PT1wqHidcA1lFa j0tuaeLy4sNLAj459g== =+W1C -----END PGP PUBLIC KEY BLOCK-----