root@iZm5edsu6v77zfb40qfbicZ:~# sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 0C49F3730359A14518585931BC711F9BA15703C6
    Executing: /tmp/tmp.JelfERqdDY/gpg.1.sh --keyserver
    hkp://keyserver.ubuntu.com:80
    --recv
    0C49F3730359A14518585931BC711F9BA15703C6
    gpg: requesting key A15703C6 from hkp server keyserver.ubuntu.com
    gpg: key A15703C6: public key "MongoDB 3.4 Release Signing Key <[email protected]>" imported
    gpg: Total number processed: 1
    gpg:               imported: 1  (RSA: 1)
    root@iZm5edsu6v77zfb40qfbicZ:~# echo "deb [ arch=amd64,arm64 ] http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.4.list
    deb [ arch=amd64,arm64 ] http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.4 multiverse
    root@iZm5edsu6v77zfb40qfbicZ:~# sudo apt-get update
    Hit:1 http://mirrors.cloud.aliyuncs.com/ubuntu xenial InRelease
    Hit:2 http://mirrors.cloud.aliyuncs.com/ubuntu xenial-updates InRelease
    Hit:3 http://mirrors.cloud.aliyuncs.com/ubuntu xenial-security InRelease
    Ign:4 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0 InRelease
    Ign:5 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.0 InRelease
    Ign:6 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.2 InRelease
    Ign:7 http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.4 InRelease
    Ign:8 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0 Release
    Get:9 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.0 Release [3462 B]
    Hit:10 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.2 Release
    Get:12 http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.4 Release [3457 B]
    Ign:13 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse amd64 Packages
    Ign:14 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse i386 Packages
    Ign:15 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse all Packages
    Ign:16 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse Translation-en
    Get:17 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.0 Release.gpg [455 B]
    Ign:17 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.0 Release.gpg
    Get:18 http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.4 Release.gpg [801 B]
    Ign:13 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse amd64 Packages
    Ign:14 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse i386 Packages
    Ign:15 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse all Packages
    Ign:16 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse Translation-en
    Hit:19 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.0/multiverse amd64 Packages
    Get:20 http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.4/multiverse amd64 Packages [8276 B]
    Get:21 http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.4/multiverse arm64 Packages [8284 B]
    Ign:13 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse amd64 Packages
    Ign:14 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse i386 Packages
    Ign:15 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse all Packages
    Ign:16 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse Translation-en
    Ign:13 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse amd64 Packages
    Ign:14 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse i386 Packages
    Ign:15 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse all Packages
    Ign:16 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse Translation-en
    Ign:13 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse amd64 Packages
    Ign:14 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse i386 Packages
    Ign:15 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse all Packages
    Ign:16 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse Translation-en
    Err:13 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse amd64 Packages
      404  Not Found
    Ign:14 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse i386 Packages
    Ign:15 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse all Packages
    Ign:16 http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0/multiverse Translation-en
    Fetched 24.7 kB in 15s (1609 B/s)
    Reading package lists... Done
    W: The repository 'http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/2.0 Release' does not have a Release file.
    N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
    N: See apt-secure(8) manpage for repository creation and user configuration details.
    W: GPG error: http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.0 Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 9ECBEC467F0CEB10
    W: The repository 'http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.0 Release' is not signed.
    N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
    N: See apt-secure(8) manpage for repository creation and user configuration details.
    E: Failed to fetch http://repo.mongodb.org/apt/ubuntu/dists/trusty/mongodb-org/2.0/multiverse/binary-amd64/Packages  404  Not Found
    E: Some index files failed to download. They have been ignored, or old ones used instead.
    root@iZm5edsu6v77zfb40qfbicZ:~# sudo apt-get install mongodb-org
    Reading package lists... Done
    Building dependency tree
    Reading state information... Done
    The following packages will be upgraded:
      mongodb-org
    1 upgraded, 0 newly installed, 0 to remove and 27 not upgraded.
    Need to get 3522 B of archives.
    After this operation, 9216 B of additional disk space will be used.
    Get:1 http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.4/multiverse amd64 mongodb-org amd64 3.4.10 [3522 B]
    Fetched 3522 B in 0s (6450 B/s)
    perl: warning: Setting locale failed.
    perl: warning: Please check that your locale settings:
    	LANGUAGE = (unset),
    	LC_ALL = (unset),
    	LC_CTYPE = "UTF-8",
    	LANG = "en_US.UTF-8"
        are supported and installed on your system.
    perl: warning: Falling back to a fallback locale ("en_US.UTF-8").
    locale: Cannot set LC_CTYPE to default locale: No such file or directory
    locale: Cannot set LC_ALL to default locale: No such file or directory
    (Reading database ... 101464 files and directories currently installed.)
    Preparing to unpack .../mongodb-org_3.4.10_amd64.deb ...
    Unpacking mongodb-org (3.4.10) over (3.2.18) ...
    Setting up mongodb-org (3.4.10) ...
    root@iZm5edsu6v77zfb40qfbicZ:~# sudo systemctl start mongod
    Failed to start mongod.service: Unit mongod.service not found.