# How to Check Linux RHEL Version


Checking your Linux RHEL version is a common task that helps you understand your system better. Whether you are managing servers or just curious about your setup, knowing the exact version of Red Hat Enterprise Linux (RHEL) is important. It helps with software compatibility, security updates, and troubleshooting.

In this article, I’ll guide you through several easy methods to check your RHEL version. You don’t need to be a Linux expert to follow along. We’ll cover commands and files you can use, so you can quickly find your system’s version anytime.

## Why Knowing Your RHEL Version Matters

Knowing your RHEL version is more than just curiosity. It affects how you manage your system and what software you can run. Here are some reasons why it’s important:

- **Software Compatibility:** Some applications require specific RHEL versions.
- **Security Updates:** Updates and patches depend on your version.
- **Troubleshooting:** Helps when seeking support or fixing issues.
- **System Audits:** Useful for compliance and documentation.

With these points in mind, let’s explore how to check your RHEL version easily.

## Using the /etc/redhat-release File

One of the simplest ways to check your RHEL version is by reading the `/etc/redhat-release` file. This file contains a text string that shows the version and release information.

To check it, open your terminal and type:

```bash
cat /etc/redhat-release
```

You will see output like this:

```
Red Hat Enterprise Linux Server release 8.7 (Ootpa)
```

This tells you the major version (8), the minor version (7), and the codename (Ootpa). This method works on most RHEL systems and is quick to use.

### Why Use /etc/redhat-release?

- It’s a standard file on RHEL systems.
- Easy to read and understand.
- No special permissions needed.

If you want a quick look without extra details, this is the best place to start.

## Using the hostnamectl Command

Another modern and convenient way to check your RHEL version is with the `hostnamectl` command. This command is often used to manage system hostname but also shows OS information.

Run this command in your terminal:

```bash
hostnamectl
```

You’ll get output like:

```
   Static hostname: myserver
         Icon name: computer-server
           Chassis: server
        Machine ID: 1234567890abcdef
           Boot ID: abcdef1234567890
  Operating System: Red Hat Enterprise Linux 8.7 (Ootpa)
       CPE OS Name: cpe:/o:redhat:enterprise_linux:8.7:GA:server
            Kernel: Linux 4.18.0-425.el8.x86_64
      Architecture: x86-64
```

Look for the **Operating System** line to find your RHEL version. This method gives you additional system info, which can be handy.

### Benefits of hostnamectl

- Shows detailed OS and hardware info.
- Useful for system administrators.
- Works on RHEL 7 and newer.

## Using the lsb_release Command

The `lsb_release` command is part of the Linux Standard Base and provides distribution-specific information. It may not be installed by default on RHEL, but you can add it easily.

To check your RHEL version with `lsb_release`, run:

```bash
lsb_release -a
```

If the command is not found, install it first:

```bash
sudo yum install redhat-lsb-core
```

The output looks like this:

```
LSB Version:    :core-4.1-amd64:core-4.1-noarch
Distributor ID: RedHatEnterpriseServer
Description:    Red Hat Enterprise Linux Server release 8.7 (Ootpa)
Release:        8.7
Codename:       Ootpa
```

This gives you a clear breakdown of your RHEL version and codename.

### When to Use lsb_release

- When you want standardized Linux distribution info.
- Helpful for scripts that check OS versions.
- Requires installation on some RHEL systems.

## Checking Version with /etc/os-release File

The `/etc/os-release` file is a universal file present on most Linux distributions, including RHEL. It contains detailed information about the OS in a key-value format.

To view it, run:

```bash
cat /etc/os-release
```

You’ll see something like:

```
NAME="Red Hat Enterprise Linux"
VERSION="8.7 (Ootpa)"
ID="rhel"
ID_LIKE="fedora"
VERSION_ID="8.7"
PLATFORM_ID="platform:el8"
PRETTY_NAME="Red Hat Enterprise Linux 8.7 (Ootpa)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:redhat:enterprise_linux:8.7:GA:server"
HOME_URL="https://www.redhat.com/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
```

Look for `VERSION` or `PRETTY_NAME` to find your RHEL version.

### Advantages of /etc/os-release

- Standardized across many Linux distros.
- Easy to parse in scripts.
- Provides detailed OS metadata.

## Using the rpm Command to Check Kernel and OS Packages

You can also check your RHEL version by querying installed packages with the `rpm` command. This is useful if you want to confirm the version of core packages.

Try:

```bash
rpm -q redhat-release
```

This will output something like:

```
redhat-release-8.7-1.el8.x86_64
```

This confirms the exact package version of your RHEL release.

You can also check the kernel version with:

```bash
uname -r
```

Example output:

```
4.18.0-425.el8.x86_64
```

This shows the kernel version, which can be important for compatibility.

### When to Use rpm and uname

- To verify installed package versions.
- When troubleshooting package-related issues.
- To check kernel version separately.

## Using the /proc/version File

The `/proc/version` file contains kernel version and build info. It’s less specific about RHEL version but gives useful kernel details.

Check it with:

```bash
cat /proc/version
```

Example output:

```
Linux version 4.18.0-425.el8.x86_64 (mockbuild@x86-02.bsys.centos.org) (gcc version 8.3.1 20190507 (Red Hat 8.3.1-5) (GCC)) #1 SMP Tue Sep 14 12:34:56 UTC 2026
```

This shows kernel build info and compiler details.

### When to Use /proc/version

- To get kernel build and compiler info.
- Useful for debugging kernel-related problems.
- Not recommended for checking exact RHEL version.

## Summary Table of Commands to Check RHEL Version

| Command/File                 | Description                          | Output Example                          |
|-----------------------------|------------------------------------|---------------------------------------|
| `cat /etc/redhat-release`   | Shows RHEL release version          | Red Hat Enterprise Linux Server release 8.7 (Ootpa) |
| `hostnamectl`               | Displays OS and hardware info       | Operating System: Red Hat Enterprise Linux 8.7 (Ootpa) |
| `lsb_release -a`            | Standard Linux distribution info    | Release: 8.7                          |
| `cat /etc/os-release`       | OS metadata in key-value format     | VERSION="8.7 (Ootpa)"                 |
| `rpm -q redhat-release`     | Shows installed release package     | redhat-release-8.7-1.el8.x86_64      |
| `uname -r`                  | Kernel version                     | 4.18.0-425.el8.x86_64                 |
| `cat /proc/version`         | Kernel build info                   | Linux version 4.18.0-425.el8.x86_64  |

## Tips for Checking RHEL Version Remotely

If you manage servers remotely, you can check the RHEL version via SSH. Just connect to your server and run any of the commands above.

For example:

```bash
ssh user@yourserver
cat /etc/redhat-release
```

This will quickly tell you the version without needing physical access.

### Additional Tips

- Use `sudo` if permission is denied.
- Combine commands in scripts for automation.
- Keep your system updated for accurate version info.

## Conclusion

Now you know several reliable ways to check your Linux RHEL version. Whether you prefer reading system files like `/etc/redhat-release` or using commands like `hostnamectl` and `lsb_release`, these methods are straightforward and effective.

Knowing your RHEL version helps you manage your system better, keep software compatible, and stay secure. Next time you need to verify your system version, just pick the method that suits you best and get the info quickly.

---

### FAQs

#### How do I check the RHEL version from the command line?

You can run `cat /etc/redhat-release` or `hostnamectl` to see your RHEL version quickly from the terminal.

#### What command shows detailed OS information on RHEL?

The `hostnamectl` command displays detailed OS and hardware info, including the RHEL version.

#### Is `lsb_release` installed by default on RHEL?

No, you may need to install it using `sudo yum install redhat-lsb-core` before using `lsb_release -a`.

#### Can I check the kernel version separately?

Yes, use `uname -r` to see the kernel version running on your RHEL system.

#### What file contains OS metadata in key-value pairs?

The `/etc/os-release` file contains detailed OS metadata in a standardized key-value format.