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i followed this ppa and getting these errors while installing Android Studiouser@walter-white:~$ sudo /opt/android-studio[sudo] password for user:sudo: /opt/android-studio: command not founduser@walter-white:~$ clearuser@walter-white:~$ sudo add-apt-repository ppaaolorotolo/android-studioAutomatic builds for Android Studio by Google packaged for Ubuntu.More info: https://launchpad.net/~paolorotolo/+...android-studioPress [ENTER] to continue or ctrl-c to cancel adding itgpg: keyring `/tmp/tmptfcrwrqv/secring.gpg' createdgpg: keyring `/tmp/tmptfcrwrqv/pubring.gpg' createdgpg: requesting key 7B9B74AA from hkp server keyserver.ubuntu.comgpg: /tmp/tmptfcrwrqv/trustdb.gpg: trustdb createdgpg: key 7B9B74AA: public key "Launchpad PPA for Paolo Rotolo" importedgpg: Total number processed: 1gpg: imported: 1 (RSA: 1)OKuser@walter-white:~$ sudo apt-get updateIgn:1 http://dl.google.com/linux/chrome/deb stable InReleaseHit:2 http://ppa.launchpad.net/notepadqq-t...tepadqq/ubuntu xenial InReleaseHit:3,ubuntu unable to locate package,ubuntu unable to resolve host,ubuntu unable to lock the administration directory,ubuntu unable to connect to upstart,ubuntu unable to enumerate usb device,ubuntu unable to mount exfat,ubuntu unable to resolve hostname,ubuntu unable to fetch some archives,ubuntu unable to locate package docker-engine,ubuntu unable to mount ...ادامه مطلب