blocks|key|2822893|text|如果“an”对您的机器具有root访问权限，可以更改/etc/+redhat+-release或安装替代内核，那么您很可能遇到了比确定系统的redhat版本更大的麻烦。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2822894|只需使用/etc/redhat-release指出的值，或者在可移植性方面更好，使用lsb_release的输出，因为这正是创建它们的目的。|2822895|“任何人”都可以对你的系统做任何事情，根本就没有其他的机会。|2822896|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

If "anybody" has root access to your machine to either change /etc/redhat-release or install an alternate kernel you're most probably in bigger trouble than determining the redhat version of your system. 

Just use the value pointed out by /etc/redhat-release or even better in terms of portability use the output of lsb_release as this is exactly the purpose they were made for.

With "anybody" being able to do anything with your system there is no other chance at all.

blocks|key|3035519|text|尝试执行以下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3035520|rpm+-qa+%7C+grep+release|code-block|syntax|javascript|3035521|例如，在我的机器上，我得到这个|3035522|3035523|+redhat-release-workstation-6Workstation-6.4.0.4.el6.x86_64|blockquote|3035524|3035525|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Q|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|R|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|S|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|T|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|U|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|O|$]]

Try this command:

<pre class="lang-sh prettyprint-override"><code>rpm -qa | grep release
</code></pre>

for instance on my machine I get this

<blockquote>
 redhat-release-workstation-6Workstation-6.4.0.4.el6.x86_64
</blockquote>

blocks|key|196010|text|您可以在最新的linux发行版上使用lsb_release命令。如果您发出以下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|196011|lsb_release+-i+-r|code-block|syntax|javascript|196012|或|196013|uname+-r|196014|并映射输出。2.6.9内核为RHEL4，2.6.18内核为RHEL5。如有必要，您可以将完整版映射到Red的特定更新版本(例如，2.6.9-89是RHEL5+U4)。|196015|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

You can use the lsb_release command on recent linux distributions. If you issue:

<pre><code>lsb_release -i -r
</code></pre>

Or

<pre><code>uname -r
</code></pre>

And map the output. 2.6.9 kernels are RHEL4, 2.6.18 kernels are RHEL5. If necessary, you can map the full version to the specific update releases from Red Hat (i.e. 2.6.9-89 is RHEL5 U4).

blocks|key|3035569|text|注意：/etc/os-release、since+July+2012应该是用于查找任何操作系统版本的标准文件。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|CODE|entityRanges|data|3035570|3035571|blockquote|3035572|3035573|3035574|It减轻了应用程序开发人员的负担，他们只想知道他们正在运行的发行版来检查大量单独的发布文件。|unordered-list-item|3035575|It既提供了一个“漂亮”的名称(即一个显示给用户的)，也提供了机器可解析的版本/操作系统标识符(即用于构建系统)。|3035576|它是可扩展的，如果需要的话，可以很容易地学习新的字段。|3035577|3035578|请参阅其man+page。|3035579|Example+for+RedHat|3035580|#+cat+/etc/os-release+
NAME="Red+Hat+Enterprise+Linux+Server"
VERSION="7.0+(Maipo)"
ID="rhel"
ID_LIKE="fedora"
VERSION_ID="7.0"
PRETTY_NAME="Red+Hat+Enterprise+Linux+Server+7.0+(Maipo)"|code-block|syntax|javascript|3035581|entityMap|0|LINK|mutability|MUTABLE|url|http://0pointer.de/blog/projects/os-release|1|http://www.freedesktop.org/software/systemd/man/os-release.html|2|https://linuxconfig.org/how-to-check-what-redhat-linux-version-is-my-system-running^0|3|F|3|F|J|F|0|0|0|0|0|0|0|0|0|0|4|8|1|0|0|I|2|0|0^^$0|@$1|2|3|4|5|6|7|1E|8|@$9|1F|A|1G|B|C]|$9|1H|A|1I|B|D]]|E|@$9|1J|A|1K|1|1L]]|F|$]]|$1|G|3|-4|5|6|7|1M|8|@]|E|@]|F|$]]|$1|H|3|-4|5|I|7|1N|8|@]|E|@]|F|$]]|$1|J|3|-4|5|6|7|1O|8|@]|E|@]|F|$]]|$1|K|3|-4|5|6|7|1P|8|@]|E|@]|F|$]]|$1|L|3|M|5|N|7|1Q|8|@]|E|@]|F|$]]|$1|O|3|P|5|N|7|1R|8|@]|E|@]|F|$]]|$1|Q|3|R|5|N|7|1S|8|@]|E|@]|F|$]]|$1|S|3|-4|5|6|7|1T|8|@]|E|@]|F|$]]|$1|T|3|U|5|6|7|1U|8|@]|E|@$9|1V|A|1W|1|1X]]|F|$]]|$1|V|3|W|5|6|7|1Y|8|@]|E|@$9|1Z|A|20|1|21]]|F|$]]|$1|X|3|Y|5|Z|7|22|8|@]|E|@]|F|$10|11]]|$1|12|3|-4|5|6|7|23|8|@]|E|@]|F|$]]]|13|$14|$5|15|16|17|F|$18|19]]|1A|$5|15|16|17|F|$18|1B]]|1C|$5|15|16|17|F|$18|1D]]]]

Note: <a href="http://0pointer.de/blog/projects/os-release" rel="nofollow">since July 2012</a>, <code>/etc/os-release</code> should be the standard file where to look for the version of any OS.

<blockquote>
 <ul>
 <li>It relieves application developers who just want to know the distribution they are running on to check for a multitude of individual release files.</li>
 <li>It provides both a "pretty" name (i.e. one to show to the user), and machine parsable version/OS identifiers (i.e. for use in build systems).</li>
 <li>It is extensible, can easily learn new fields if needed. </li>
 </ul>
</blockquote>

See its <a href="http://www.freedesktop.org/software/systemd/man/os-release.html" rel="nofollow">man page</a>.

<a href="https://linuxconfig.org/how-to-check-what-redhat-linux-version-is-my-system-running" rel="nofollow">Example for RedHat</a>:

<pre><code># cat /etc/os-release 
NAME="Red Hat Enterprise Linux Server"
VERSION="7.0 (Maipo)"
ID="rhel"
ID_LIKE="fedora"
VERSION_ID="7.0"
PRETTY_NAME="Red Hat Enterprise Linux Server 7.0 (Maipo)"
</code></pre>

blocks|key|198523|text|一个在众多Linux发行版上有效的技巧：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|198524|cat+/etc/issue|code-block|syntax|javascript|198525|198526|RedHat6上的示例|offset|length|style|BOLD|198527|$+cat+/etc/issue
CentOS+release+6.7+(Final)
Kernel+\r+on+an+\m

$+|198528|entityMap^0|0|0|0|9|2|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|T|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|U|8|@$J|V|K|W|L|M]]|9|@]|A|$]]|$1|N|3|O|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|P|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|Q|$]]

A trick working on numerous Linux distributions:

<pre><code>cat /etc/issue
</code></pre>

<hr>

Example on Red Hat 6:

<pre><code>$ cat /etc/issue
CentOS release 6.7 (Final)
Kernel \r on an \m

$ 
</code></pre>

blocks|key|3035544|text|最简单的命令是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3035545|lsb_release+-d|code-block|syntax|javascript|3035546|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The most simple command is:

<pre><code>lsb_release -d
</code></pre>

blocks|key|3035583|text|试一试|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3035584|uname+-r|code-block|syntax|javascript|3035585|或|3035586|cat+/etc/issue|3035587|对于最新的linux计算机|3035588|lsb_release+-d|3035589|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

try 

<pre><code>uname -r
</code></pre>

or

<pre><code>cat /etc/issue
</code></pre>

for recent linux machines

<pre><code>lsb_release -d
</code></pre>

blocks|key|196606|text|对于今天或将来正在阅读这篇文章的人：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|196607|正在运行的内核版本就是您的RedHat版本。可能已安装其他版本，但未运行。|196608|因此，如果计算机上安装了RedHat+5.1、5.2和5.x，则一次只能运行一个。这是在系统启动时引导的版本，使用uname命令确定实际运行的版本：|offset|length|style|CODE|196609|uname+-r|196610|这将返回内核版本号。对于RedHat+5，它将是2.6.18左右|196611|RH+5.1是2.6.18-53|196612|RH+5.2为2.6.18-92|196613|要将内核版本号转换为Redhat版本号，请参阅此链接：|196614|Red+Hat+Enterprise+Linux+Release+Dates|196615|entityMap|0|LINK|mutability|MUTABLE|url|https://access.redhat.com/articles/3078^0|0|0|1L|5|0|0|8|0|0|0|0|0|0|12|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|14|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|15|8|@$F|16|G|17|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|18|8|@$F|19|G|1A|H|I]]|9|@]|A|$]]|$1|L|3|M|5|6|7|1B|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1C|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1D|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1E|8|@]|9|@]|A|$]]|$1|T|3|U|5|6|7|1F|8|@]|9|@$F|1G|G|1H|1|1I]]|A|$]]|$1|V|3|-4|5|6|7|1J|8|@]|9|@]|A|$]]]|W|$X|$5|Y|Z|10|A|$11|12]]]]

For folks who are reading this today, or in the future: 
The kernel version that is RUNNING is your version of RedHat. There may be other versions installed, but not running. 
Thus, if RedHat 5.1, 5.2 &amp; 5.x are installed on the machine, only 1 can be running at a time. This is the version that was booted at system start uop.To determine which version is actually running, use the <code>uname</code> command: 
<code>uname -r</code> 
This returns the Kernel release number.
For RedHat 5, it will be 2.6.18-[something] 
RH 5.1 is 2.6.18-53 
RH 5.2 is 2.6.18-92 
 
To translate kernel release numbers into Redhat Version numbers, see this link: 
<a href="https://access.redhat.com/articles/3078" rel="nofollow noreferrer">Red Hat Enterprise Linux Release Dates</a>

blocks|key|196063|text|文件/etc/redhat-release是获取供应商版本(包括5.X)的标准方法。我认为你不应该忽视这一点。当然，您可以使用其他软件的各种技巧来显示操作系统的当前版本，但不管怎样，它们中的许多软件都在解析/etc文件。如上所述，您可以使用rpm查询来获取版本。获取此类信息的另一种方式：rpm+-q+<vendor-name>-release|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|196064|顺便说一句，我同意上面的评论者的观点，如果任何人可以篡改标准的/etc/redhat-release文件或其他系统配置文件，那么知道版本的方式就是你最小的问题。|196065|此外，由于RHEL7.x版本，您还可以尝试hostnamectl+%7C+grep+'Operating+System'|196066|entityMap^0|2|J|40|S|0|0|L|11|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Q|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@]|E|$]]|$1|J|3|-4|5|6|7|U|8|@]|D|@]|E|$]]]|K|$]]

The file <code>/etc/redhat-release</code> is standart way to get vendor version (including 5.X). I don't think you should ignore this way. Of course, you can use various tricks from other software to display the current version of OS, but anyway many of them are parsing the /etc files. As mentioned above you can use rpm query to get version. Another way to get such information: <code>rpm -q &lt;vendor-name&gt;-release</code>
BTW I agree with the commenters above that the way you knowing the version is the least of your problems if anyone can tamper with the standard /etc/redhat-release file or other system configuration files.
Additionally since RHEL 7.X versions you can also try <code>hostnamectl | grep 'Operating System'</code>

How do I determine which <code>RedHat</code> Linux version I am running?

Here's what I've read:

<ul>
<li><code>/etc/redhat-release</code> file contains the version, but anybody can tamper with that file.</li>
<li>people say <code>uname</code> command, but you can install any kernel on Redhat.</li>
</ul>

If I am running redhat 5.1 and someone upgrade it with 5.2 or 5.x, what determines the version of RedHat?

even <code>lsb_release -a</code> read /etc/redhat-release file.

Determine Redhat Linux Version

如何确定我正在运行的RedHat Linux版本？以下是我读到的内容：/etc/redhat-release文件包含版本，但任何人都可以篡改该文件。人员说uname命令，但你可以在Redhat上安装任何内核。如果我运行的是RedHat 5.1，有人用5.2或5.x升级了它，是什么决定了redhat的版本？甚至lsb_release -a读取/etc/redhat-release文件。

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