https://ethereum.github.io/go-ethereum/install/
遇到Cannot add PPA: 'ppa:~ethereum/ubuntu/ethereum'.
ERROR: '~ethereum' user or team does not exist.怎么办?
https://blog.fazero.me/2015/09/15/%E8%AE%A9%E7%BB%88%E7%AB%AF%E8%B5%B0%E4%BB%A3%E7%90%86%E7%9A%84%E5%87%A0%E7%A7%8D%E6%96%B9%E6%B3%95/
linux@ubuntu:~$ sudo add-apt-repository -y ppa:ethereum/ethereum
[sudo] password for linux:
Cannot add PPA: 'ppa:~ethereum/ubuntu/ethereum'.
ERROR: '~ethereum' user or team does not exist.
linux@ubuntu:~$
linux@ubuntu:~$
linux@ubuntu:~$
linux@ubuntu:~$
linux@ubuntu:~$ export http_proxy="socks5://127.0.0.1:1080"
linux@ubuntu:~$ export https_proxy="socks5://127.0.0.1:1080"
linux@ubuntu:~$ export ALL_PROXY=socks5://127.0.0.1:1080
linux@ubuntu:~$
linux@ubuntu:~$
linux@ubuntu:~$ sudo add-apt-repository -y ppa:ethereum/ethereum
gpg: keyring `/tmp/tmphzp21ra2/secring.gpg' created
gpg: keyring `/tmp/tmphzp21ra2/pubring.gpg' created
gpg: requesting key 923F6CA9 from hkp server keyserver.ubuntu.com
gpg: /tmp/tmphzp21ra2/trustdb.gpg: trustdb created
gpg: key 923F6CA9: public key "Launchpad PPA for Ethereum" imported
gpg: Total number processed: 1
gpg: imported: 1 (RSA: 1)
OK