我有一个CentOS Linux版本7.2.1511（核心版）。
我想为当前运行的内核构建一些内核代码。
我的uname -r说class NameBuilder
def build_name
# builds name...
end
end
class A
def create_server
options = {
name: NameBuilder.new.build_name
}
do_some_operations(options)
end
def do_some_operations(options)
# does some operations
end
end
RSpec.describe A do
let(:a) { described_class.new }
describe '#create_server' do
let(:name_builder) { instance_double(NameBuilder) }
before do
allow(NameBuilder).to receive(:new).and_return(name_builder)
end
it 'does operations' do
# the first expectation isn't really part of what you seem
# to want to test, but it shows that this way of testing can work
expect(name_builder).to receive(:build_name)
expect(a).to receive(:do_some_operations)
a.create_server
end
end
end
，但是ls -l / usr / src / kernels /
仅显示3.10.0-327.10.1.el7.x86_64。为什么我的文件系统上有非当前内核的源代码（vanilla fresh provisioned Digitalocean box）？
为什么yum install kernel-devel不会为当前运行的内核安装头文件？
答案 0 :(得分：1)
uname是对内核的系统调用以获取信息。它告诉你那台机器上正在运行什么。硬盘上实际存在的内容可以是任何人安装的任何内容。有人可能下载了错误的软件包，或者您可能安装了多个内核等。但是，正在运行的那个是uname告诉您的。