A versão antiga do g ++ / gcc no meu computador é a 4.6.3. Eu preciso atualizá-lo para 4.8, porque alguns softwares que eu quero instalar são necessários.
Mas quando eu atualizo o g + + / gcc no ubuntu 12.04 como o comando follow, houve alguns erros.
sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt-get install gcc-4.8
Eu posso executar bem o primeiro comando.
myshu@ubuntu-headnode:~$ sudo add-apt-repository ppa:ubuntu-toolchain-r/test
You are about to add the following PPA to your system:
Toolchain test builds; see https://wiki.ubuntu.com/ToolChain
More info: https://launchpad.net/~ubuntu-toolchain-r/+archive/ubuntu/test
Press [ENTER] to continue or ctrl-c to cancel adding it
gpg: keyring '/tmp/tmp4H9X2n/secring.gpg' created
gpg: keyring '/tmp/tmp4H9X2n/pubring.gpg' created
gpg: requesting key BA9EF27F from hkp server keyserver.ubuntu.com
gpg: /tmp/tmp4H9X2n/trustdb.gpg: trustdb created
gpg: key BA9EF27F: public key "Launchpad Toolchain builds" imported
gpg: Total number processed: 1
gpg: imported: 1 (RSA: 1)
OK
Mas o "sudo apt-get update" sempre tem erros.
myshu@ubuntu-headnode:~$ sudo apt-get update
Hit http://mirrors.sohu.com precise Release.gpg
Get:1 http://mirrors.sohu.com precise-updates Release.gpg [198 B]
Hit http://mirrors.sohu.com precise-backports Release.gpg
Get:2 http://mirrors.sohu.com precise-security Release.gpg [198 B]
Hit http://mirrors.sohu.com precise Release
Get:3 http://mirrors.sohu.com precise-updates Release [55.4 kB]
Hit http://mirrors.sohu.com precise-backports Release
Get:4 http://mirrors.sohu.com precise-security Release [55.5 kB]
Hit http://mirrors.sohu.com precise/main Sources
Hit http://mirrors.sohu.com precise/restricted Sources
Hit http://mirrors.sohu.com precise/universe Sources
Hit http://mirrors.sohu.com precise/multiverse Sources
Hit http://mirrors.sohu.com precise/main amd64 Packages
Hit http://mirrors.sohu.com precise/restricted amd64 Packages
Hit http://mirrors.sohu.com precise/universe amd64 Packages
Hit http://mirrors.sohu.com precise/multiverse amd64 Packages
Hit http://mirrors.sohu.com precise/main i386 Packages
Hit http://mirrors.sohu.com precise/restricted i386 Packages
Hit http://mirrors.sohu.com precise/universe i386 Packages
Hit http://mirrors.sohu.com precise/multiverse i386 Packages
Hit http://mirrors.sohu.com precise/main TranslationIndex
Hit http://mirrors.sohu.com precise/multiverse TranslationIndex
Hit http://mirrors.sohu.com precise/restricted TranslationIndex
Hit http://mirrors.sohu.com precise/universe TranslationIndex
Get:5 http://mirrors.sohu.com precise-updates/main Sources [500 kB]
Get:6 http://extras.ubuntu.com precise Release.gpg [72 B]
Get:7 http://mirrors.sohu.com precise-updates/restricted Sources [8,835 B]
Get:8 http://mirrors.sohu.com precise-updates/universe Sources [134 kB]
Get:9 http://mirrors.sohu.com precise-updates/multiverse Sources [10.5 kB]
Get:10 http://mirrors.sohu.com precise-updates/main amd64 Packages [1,050 kB]
Hit http://extras.ubuntu.com precise Release
Hit http://extras.ubuntu.com precise/main Sources
Hit http://ppa.launchpad.net precise Release.gpg
Get:11 http://mirrors.sohu.com precise-updates/restricted amd64 Packages [15.4 kB]
Get:12 http://mirrors.sohu.com precise-updates/universe amd64 Packages [285 kB]
Get:13 http://mirrors.sohu.com precise-updates/multiverse amd64 Packages [17.1 kB]
Get:14 http://mirrors.sohu.com precise-updates/main i386 Packages [1,126 kB]
Hit http://extras.ubuntu.com precise/main amd64 Packages
Hit http://extras.ubuntu.com precise/main i386 Packages
Ign http://extras.ubuntu.com precise/main TranslationIndex
Get:15 http://mirrors.sohu.com precise-updates/restricted i386 Packages [15.4 kB]
Get:16 http://mirrors.sohu.com precise-updates/universe i386 Packages [294 kB]
Get:17 http://mirrors.sohu.com precise-updates/multiverse i386 Packages [17.3 kB]
Get:18 http://mirrors.sohu.com precise-updates/main TranslationIndex [208 B]
Get:19 http://mirrors.sohu.com precise-updates/multiverse TranslationIndex [202 B]
Get:20 http://mirrors.sohu.com precise-updates/restricted TranslationIndex [202 B]
Get:21 http://mirrors.sohu.com precise-updates/universe TranslationIndex [205 B]
Hit http://mirrors.sohu.com precise-backports/main Sources
Hit http://mirrors.sohu.com precise-backports/restricted Sources
Hit http://mirrors.sohu.com precise-backports/universe Sources
Hit http://mirrors.sohu.com precise-backports/multiverse Sources
Hit http://mirrors.sohu.com precise-backports/main amd64 Packages
Hit http://mirrors.sohu.com precise-backports/restricted amd64 Packages
Hit http://mirrors.sohu.com precise-backports/universe amd64 Packages
Hit http://mirrors.sohu.com precise-backports/multiverse amd64 Packages
Hit http://mirrors.sohu.com precise-backports/main i386 Packages
Hit http://mirrors.sohu.com precise-backports/restricted i386 Packages
Hit http://mirrors.sohu.com precise-backports/universe i386 Packages
Hit http://mirrors.sohu.com precise-backports/multiverse i386 Packages
Hit http://mirrors.sohu.com precise-backports/main TranslationIndex
Hit http://mirrors.sohu.com precise-backports/multiverse TranslationIndex
Hit http://mirrors.sohu.com precise-backports/restricted TranslationIndex
Hit http://mirrors.sohu.com precise-backports/universe TranslationIndex
Get:22 http://mirrors.sohu.com precise-security/main Sources [146 kB]
Get:23 http://mirrors.sohu.com precise-security/restricted Sources [4,636 B]
Get:24 http://mirrors.sohu.com precise-security/universe Sources [55.3 kB]
Get:25 http://mirrors.sohu.com precise-security/multiverse Sources [3,035 B]
Get:26 http://mirrors.sohu.com precise-security/main amd64 Packages [668 kB]
Hit http://ppa.launchpad.net precise Release
Get:27 http://mirrors.sohu.com precise-security/restricted amd64 Packages [10.8 kB]
Get:28 http://mirrors.sohu.com precise-security/universe amd64 Packages [141 kB]
Get:29 http://mirrors.sohu.com precise-security/multiverse amd64 Packages [3,352 B]
Get:30 http://mirrors.sohu.com precise-security/main i386 Packages [741 kB]
Get:31 http://ppa.launchpad.net precise/main Sources [1,600 B]
Get:32 http://mirrors.sohu.com precise-security/restricted i386 Packages [10.8 kB]
Get:33 http://mirrors.sohu.com precise-security/universe i386 Packages [149 kB]
Get:34 http://mirrors.sohu.com precise-security/multiverse i386 Packages [3,533 B]
Get:35 http://mirrors.sohu.com precise-security/main TranslationIndex [208 B]
Get:36 http://mirrors.sohu.com precise-security/multiverse TranslationIndex [199 B]
Get:37 http://mirrors.sohu.com precise-security/restricted TranslationIndex [202 B]
Get:38 http://mirrors.sohu.com precise-security/universe TranslationIndex [205 B]
Hit http://mirrors.sohu.com precise/main Translation-en
Hit http://mirrors.sohu.com precise/multiverse Translation-en
Hit http://mirrors.sohu.com precise/restricted Translation-en
Hit http://mirrors.sohu.com precise/universe Translation-en
Get:39 http://mirrors.sohu.com precise-updates/main Translation-en [432 kB]
Ign http://extras.ubuntu.com precise/main Translation-en_US
Get:40 http://mirrors.sohu.com precise-updates/multiverse Translation-en [10.1 kB]
Get:41 http://mirrors.sohu.com precise-updates/restricted Translation-en [3,690 B]
Get:42 http://mirrors.sohu.com precise-updates/universe Translation-en [172 kB]
Hit http://mirrors.sohu.com precise-backports/main Translation-en
Hit http://mirrors.sohu.com precise-backports/multiverse Translation-en
Hit http://mirrors.sohu.com precise-backports/restricted Translation-en
Hit http://mirrors.sohu.com precise-backports/universe Translation-en
Get:43 http://mirrors.sohu.com precise-security/main Translation-en [270 kB]
Ign http://extras.ubuntu.com precise/main Translation-en
Get:44 http://mirrors.sohu.com precise-security/multiverse Translation-en [1,993 B]
Get:45 http://mirrors.sohu.com precise-security/restricted Translation-en [2,805 B]
Get:46 http://mirrors.sohu.com precise-security/universe Translation-en [90.4 kB]
Hit http://ppa.launchpad.net precise/main TranslationIndex
Get:47 http://ppa.launchpad.net precise/main amd64 Packages [25.7 kB]
Get:48 http://ppa.launchpad.net precise/main i386 Packages [3,396 B]
Get:49 http://ppa.launchpad.net precise/main Translation-en [1,556 B]
Ign http://dl.secondarymetabolites.org jessie Release.gpg
Ign http://dl.secondarymetabolites.org jessie Release
Ign http://dl.secondarymetabolites.org jessie/main TranslationIndex
Err http://dl.secondarymetabolites.org jessie/main amd64 Packages
Undetermined Error [IP: 130.226.56.135 80]
Err http://dl.secondarymetabolites.org jessie/main i386 Packages
Undetermined Error [IP: 130.226.56.135 80]
Ign http://dl.secondarymetabolites.org jessie/main Translation-en_US
Ign http://dl.secondarymetabolites.org jessie/main Translation-en
Fetched 6,537 kB in 10min 14s (10.6 kB/s)
W: Failed to fetch http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu/dists/precise/main/source/Sources Hash Sum mismatch
W: Failed to fetch http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu/dists/precise/main/binary-amd64/Packages Hash Sum mismatch
W: Failed to fetch http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu/dists/precise/main/binary-i386/Packages Hash Sum mismatch
W: Failed to fetch http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu/dists/precise/main/i18n/Translation-en Hash Sum mismatch
W: Failed to fetch http://dl.secondarymetabolites.org/repos/deb/dists/jessie/main/binary-amd64/Packages Undetermined Error [IP: 130.226.56.135 80]
W: Failed to fetch http://dl.secondarymetabolites.org/repos/deb/dists/jessie/main/binary-i386/Packages Undetermined Error [IP: 130.226.56.135 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
Alguém pode me ajudar a resolver esse problema?