由于目前没有找到一个合适的办法，将本机.NET Core的版本升级到1.1，故只有先卸载再安装最新版本了。

卸载脚本链接为：https://github.com/dotnet/cli/blob/rel/1.0.0/scripts/obtain/uninstall/dotnet-uninstall-pkgs.sh

#!/usr/bin/env bash

#

# Copyright (c) .NET Foundation and contributors. All rights reserved.

# Licensed under the MIT license. See LICENSE file in the project root for full license information.

#

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

current_userid=$(id -u)

if [ $current_userid -ne 0 ]; then

    echo "$(basename "$0") uninstallation script requires superuser privileges to run" >&2

    exit 1

fi

# this is the common suffix for all the dotnet pkgs

dotnet_pkg_name_suffix="com.microsoft.dotnet"

dotnet_install_root="/usr/local/share/dotnet"

dotnet_path_file="/etc/paths.d/dotnet"

remove_dotnet_pkgs(){

    installed_pkgs=($(pkgutil --pkgs | grep $dotnet_pkg_name_suffix))

    for i in "${installed_pkgs[@]}"

    do

        echo "Removing dotnet component - \"$i\"" >&2

        pkgutil --force --forget "$i"

    done

}

remove_dotnet_pkgs

[ "$?" -ne 0 ] && echo "Failed to remove dotnet packages." >&2 && exit 1

echo "Deleting install root - $dotnet_install_root" >&2

rm -rf "$dotnet_install_root"

rm -f "$dotnet_path_file"

echo "dotnet packages removal succeeded." >&2

exit 0

执行的时候，需要chmod 777