command line - Error while trying to install Git. "The following packages cannot be authenticated!" - Ask Ubuntu

(just bit of context: i'm new ubuntu , i'm trying hang of terminal , installing programs on pc. trying install media player mpv, first requested me make sure git installed, here am.)

---

i typed git on command line, , said program not installed. went ahead and:

$ sudo apt-get install git 

and got this:

the following packages installed:   git-man liberror-perl suggested packages:   git-daemon-run git-daemon-sysvinit git-doc git-el git-email git-gui gitk   gitweb git-arch git-bzr git-cvs git-svn following new packages installed:   git git-man liberror-perl 0 upgraded, 3 newly installed, 0 remove , 258 not upgraded. want continue [y/n]? 

i gave go ahead , prompted me this:

warning: following packages cannot authenticated!   liberror-perl git-man git install these packages without verification [y/n]?  

if type "n", exits saying "e: packages not authenticated". if type "y", gives me instead:

err http://br.archive.ubuntu.com/ubuntu/ saucy/main git-man 1:1.8.3.2-1   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com/ubuntu/ saucy/main git amd64 1:1.8.3.2-1   404  not found [ip: 2801:82:80ff:8000::5 80] failed fetch http://br.archive.ubuntu.com/ubuntu/pool/main/g/git/git-man_1.8.3.2-1_all.deb  404  not found [ip: 2801:82:80ff:8000::5 80] failed fetch http://br.archive.ubuntu.com/ubuntu/pool/main/g/git/git_1.8.3.2-1_amd64.deb  404  not found [ip: 2801:82:80ff:8000::5 80] e: unable fetch archives, maybe run apt-get update or try --fix-missing? 

so ran "--fix-missing", after repeating of steps again exited time saying "unable correct missing packages. e: aborting install.". went last option run:

$ sudo apt-get update 

and got:

ign http://br.archive.ubuntu.com saucy inrelease ign http://br.archive.ubuntu.com saucy-updates inrelease                        ign http://br.archive.ubuntu.com saucy-backports inrelease                      ign http://br.archive.ubuntu.com saucy release.gpg                              ign http://br.archive.ubuntu.com saucy-updates release.gpg                      ign http://br.archive.ubuntu.com saucy-backports release.gpg                    ign http://br.archive.ubuntu.com saucy release                                  ign http://br.archive.ubuntu.com saucy-updates release                          ign http://br.archive.ubuntu.com saucy-backports release                        ign http://br.archive.ubuntu.com saucy/main sources/diffindex                   ign http://br.archive.ubuntu.com saucy/restricted sources/diffindex             ign http://br.archive.ubuntu.com saucy/universe sources/diffindex               ign http://br.archive.ubuntu.com saucy/multiverse sources/diffindex             ign http://br.archive.ubuntu.com saucy/main amd64 packages/diffindex            ign http://br.archive.ubuntu.com saucy/restricted amd64 packages/diffindex      ign http://br.archive.ubuntu.com saucy/universe amd64 packages/diffindex ign http://br.archive.ubuntu.com saucy/multiverse amd64 packages/diffindex ign http://br.archive.ubuntu.com saucy/main i386 packages/diffindex ign http://br.archive.ubuntu.com saucy/restricted i386 packages/diffindex ign http://linux.dropbox.com precise inrelease  ign http://br.archive.ubuntu.com saucy/universe i386 packages/diffindex ign http://br.archive.ubuntu.com saucy/multiverse i386 packages/diffindex hit http://linux.dropbox.com precise release.gpg                      ign http://security.ubuntu.com saucy-security inrelease               ign http://br.archive.ubuntu.com saucy-updates/main sources/diffindex ign http://br.archive.ubuntu.com saucy-updates/restricted sources/diffindex ign http://br.archive.ubuntu.com saucy-updates/universe sources/diffindex ign http://br.archive.ubuntu.com saucy-updates/multiverse sources/diffindex ign http://br.archive.ubuntu.com saucy-updates/main amd64 packages/diffindex hit http://linux.dropbox.com precise release    ign http://br.archive.ubuntu.com saucy-updates/restricted amd64 packages/diffindex ign http://br.archive.ubuntu.com saucy-updates/universe amd64 packages/diffindex ign http://security.ubuntu.com saucy-security release.gpg              ign http://br.archive.ubuntu.com saucy-updates/multiverse amd64 packages/diffindex ign http://br.archive.ubuntu.com saucy-updates/main i386 packages/diffindex ign http://br.archive.ubuntu.com saucy-updates/restricted i386 packages/diffindex ign http://br.archive.ubuntu.com saucy-updates/universe i386 packages/diffindex ign http://br.archive.ubuntu.com saucy-updates/multiverse i386 packages/diffindex hit http://linux.dropbox.com precise/main amd64 packages              ign http://security.ubuntu.com saucy-security release                 ign http://br.archive.ubuntu.com saucy-backports/main sources/diffindex ign http://br.archive.ubuntu.com saucy-backports/restricted sources/diffindex ign http://br.archive.ubuntu.com saucy-backports/universe sources/diffindex ign http://br.archive.ubuntu.com saucy-backports/multiverse sources/diffindex ign http://br.archive.ubuntu.com saucy-backports/main amd64 packages/diffindex hit http://linux.dropbox.com precise/main i386 packages               ign http://br.archive.ubuntu.com saucy-backports/restricted amd64 packages/diffindex ign http://br.archive.ubuntu.com saucy-backports/universe amd64 packages/diffindex ign http://br.archive.ubuntu.com saucy-backports/multiverse amd64 packages/diffindex ign http://br.archive.ubuntu.com saucy-backports/main i386 packages/diffindex ign http://br.archive.ubuntu.com saucy-backports/restricted i386 packages/diffindex ign http://security.ubuntu.com saucy-security/main sources/diffindex  ign http://br.archive.ubuntu.com saucy-backports/universe i386 packages/diffindex ign http://br.archive.ubuntu.com saucy-backports/multiverse i386 packages/diffindex ign http://security.ubuntu.com saucy-security/restricted sources/diffindex ign http://security.ubuntu.com saucy-security/universe sources/diffindex ign http://security.ubuntu.com saucy-security/multiverse sources/diffindex ign http://security.ubuntu.com saucy-security/main amd64 packages/diffindex ign http://security.ubuntu.com saucy-security/restricted amd64 packages/diffindex ign http://security.ubuntu.com saucy-security/universe amd64 packages/diffindex ign http://security.ubuntu.com saucy-security/multiverse amd64 packages/diffindex ign http://security.ubuntu.com saucy-security/main i386 packages/diffindex ign http://security.ubuntu.com saucy-security/restricted i386 packages/diffindex ign http://security.ubuntu.com saucy-security/universe i386 packages/diffindex ign http://security.ubuntu.com saucy-security/multiverse i386 packages/diffindex ign http://linux.dropbox.com precise/main translation-en_us           ign http://linux.dropbox.com precise/main translation-en              ign http://br.archive.ubuntu.com saucy/main translation-en_us ign http://br.archive.ubuntu.com saucy/main translation-en ign http://br.archive.ubuntu.com saucy/multiverse translation-en_us ign http://br.archive.ubuntu.com saucy/multiverse translation-en ign http://br.archive.ubuntu.com saucy/restricted translation-en_us ign http://br.archive.ubuntu.com saucy/restricted translation-en ign http://br.archive.ubuntu.com saucy/universe translation-en_us ign http://br.archive.ubuntu.com saucy/universe translation-en ign http://br.archive.ubuntu.com saucy-updates/main translation-en_us ign http://br.archive.ubuntu.com saucy-updates/main translation-en ign http://br.archive.ubuntu.com saucy-updates/multiverse translation-en_us ign http://br.archive.ubuntu.com saucy-updates/multiverse translation-en ign http://br.archive.ubuntu.com saucy-updates/restricted translation-en_us ign http://br.archive.ubuntu.com saucy-updates/restricted translation-en ign http://br.archive.ubuntu.com saucy-updates/universe translation-en_us ign http://br.archive.ubuntu.com saucy-updates/universe translation-en ign http://br.archive.ubuntu.com saucy-backports/main translation-en_us ign http://br.archive.ubuntu.com saucy-backports/main translation-en ign http://br.archive.ubuntu.com saucy-backports/multiverse translation-en_us   ign http://br.archive.ubuntu.com saucy-backports/multiverse translation-en      ign http://br.archive.ubuntu.com saucy-backports/restricted translation-en_us ign http://br.archive.ubuntu.com saucy-backports/restricted translation-en ign http://br.archive.ubuntu.com saucy-backports/universe translation-en_us ign http://br.archive.ubuntu.com saucy-backports/universe translation-en err http://br.archive.ubuntu.com saucy/main sources   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy/restricted sources   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy/universe sources   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy/multiverse sources   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy/main amd64 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy/restricted amd64 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy/universe amd64 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy/multiverse amd64 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy/main i386 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy/restricted i386 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy/universe i386 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy/multiverse i386 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-updates/main sources   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-updates/restricted sources   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-updates/universe sources   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-updates/multiverse sources   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-updates/main amd64 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-updates/restricted amd64 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-updates/universe amd64 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-updates/multiverse amd64 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-updates/main i386 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-updates/restricted i386 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-updates/universe i386 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-updates/multiverse i386 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-backports/main sources   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-backports/restricted sources   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-backports/universe sources   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-backports/multiverse sources   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-backports/main amd64 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-backports/restricted amd64 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-backports/universe amd64 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-backports/multiverse amd64 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-backports/main i386 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-backports/restricted i386 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-backports/universe i386 packages   404  not found [ip: 2801:82:80ff:8000::5 80] err http://br.archive.ubuntu.com saucy-backports/multiverse i386 packages   404  not found [ip: 2801:82:80ff:8000::5 80] ign http://security.ubuntu.com saucy-security/main translation-en_us ign http://security.ubuntu.com saucy-security/main translation-en ign http://security.ubuntu.com saucy-security/multiverse translation-en_us ign http://security.ubuntu.com saucy-security/multiverse translation-en ign http://security.ubuntu.com saucy-security/restricted translation-en_us ign http://security.ubuntu.com saucy-security/restricted translation-en ign http://security.ubuntu.com saucy-security/universe translation-en_us ign http://security.ubuntu.com saucy-security/universe translation-en err http://security.ubuntu.com saucy-security/main sources   404  not found [ip: 2001:67c:1562::19 80] err http://security.ubuntu.com saucy-security/restricted sources   404  not found [ip: 2001:67c:1562::19 80] err http://security.ubuntu.com saucy-security/universe sources   404  not found [ip: 2001:67c:1562::19 80] err http://security.ubuntu.com saucy-security/multiverse sources   404  not found [ip: 2001:67c:1562::19 80] err http://security.ubuntu.com saucy-security/main amd64 packages   404  not found [ip: 2001:67c:1562::19 80] err http://security.ubuntu.com saucy-security/restricted amd64 packages   404  not found [ip: 2001:67c:1562::19 80] err http://security.ubuntu.com saucy-security/universe amd64 packages   404  not found [ip: 2001:67c:1562::19 80] err http://security.ubuntu.com saucy-security/multiverse amd64 packages   404  not found [ip: 2001:67c:1562::19 80] err http://security.ubuntu.com saucy-security/main i386 packages   404  not found [ip: 2001:67c:1562::19 80] err http://security.ubuntu.com saucy-security/restricted i386 packages   404  not found [ip: 2001:67c:1562::19 80] err http://security.ubuntu.com saucy-security/universe i386 packages   404  not found [ip: 2001:67c:1562::19 80] err http://security.ubuntu.com saucy-security/multiverse i386 packages   404  not found [ip: 2001:67c:1562::19 80] w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy/main/source/sources  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy/restricted/source/sources  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy/universe/source/sources  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy/multiverse/source/sources  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy/main/binary-amd64/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy/restricted/binary-amd64/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy/universe/binary-amd64/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy/multiverse/binary-amd64/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy/main/binary-i386/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy/restricted/binary-i386/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy/universe/binary-i386/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy/multiverse/binary-i386/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-updates/main/source/sources  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-updates/restricted/source/sources  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-updates/universe/source/sources  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-updates/multiverse/source/sources  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-updates/main/binary-amd64/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-updates/restricted/binary-amd64/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-updates/universe/binary-amd64/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-updates/multiverse/binary-amd64/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-updates/main/binary-i386/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-updates/restricted/binary-i386/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-updates/universe/binary-i386/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-updates/multiverse/binary-i386/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-backports/main/source/sources  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-backports/restricted/source/sources  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-backports/universe/source/sources  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-backports/multiverse/source/sources  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-backports/main/binary-amd64/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-backports/restricted/binary-amd64/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-backports/universe/binary-amd64/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-backports/multiverse/binary-amd64/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-backports/main/binary-i386/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-backports/restricted/binary-i386/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/main/source/sources  404  not found [ip: 2001:67c:1562::19 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-backports/universe/binary-i386/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://br.archive.ubuntu.com/ubuntu/dists/saucy-backports/multiverse/binary-i386/packages  404  not found [ip: 2801:82:80ff:8000::5 80]  w: failed fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/restricted/source/sources  404  not found [ip: 2001:67c:1562::19 80]  w: failed fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/universe/source/sources  404  not found [ip: 2001:67c:1562::19 80]  w: failed fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/multiverse/source/sources  404  not found [ip: 2001:67c:1562::19 80]  w: failed fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/main/binary-amd64/packages  404  not found [ip: 2001:67c:1562::19 80]  w: failed fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/restricted/binary-amd64/packages  404  not found [ip: 2001:67c:1562::19 80]  w: failed fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/universe/binary-amd64/packages  404  not found [ip: 2001:67c:1562::19 80]  w: failed fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/multiverse/binary-amd64/packages  404  not found [ip: 2001:67c:1562::19 80]  w: failed fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/main/binary-i386/packages  404  not found [ip: 2001:67c:1562::19 80]  w: failed fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/restricted/binary-i386/packages  404  not found [ip: 2001:67c:1562::19 80]  w: failed fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/universe/binary-i386/packages  404  not found [ip: 2001:67c:1562::19 80]  w: failed fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/multiverse/binary-i386/packages  404  not found [ip: 2001:67c:1562::19 80]  e: index files failed download. have been ignored, or old ones used instead. 

i don't know make of of this. last line is:

e: index files failed download. have been ignored, or old ones used instead.

i thought might've done trick retraced steps install git again got same errors, apparently didn't work. i'm @ loss , don't know how proceed, appreciated, thanks.

you running outdated version of ubuntu (saucy). packages not supported anymore. need upgrade recent, supported version of ubuntu first.

here how: how install software or upgrade old unsupported release? (hat tip @jonascz).