Скачать или смотреть Easily Get Use% of a Mount Point in OEL with Shell Commands

Learn how to retrieve the `Use%` of a mount point in Oracle Enterprise Linux (OEL) using simple shell commands. Follow our step-by-step guide for a reliable solution.
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How to Easily Retrieve Use% of a Mount Point in OEL

If you're working on Oracle Enterprise Linux (OEL) and need to find out the percentage of used space (Use%) on a specific mount point, you might run into some challenges. While the command df provides useful information about disk usage, it doesn't always yield a consistent output across different hosts. In this guide, we'll break down a foolproof way to reliably obtain the Use% of any specified mount point using shell commands.

The Problem at Hand

While trying to use a shell command to get the Use% of a mount point, you may have encountered varying results. For instance, using the following command:

[[See Video to Reveal this Text or Code Snippet]]

works on some systems but might fail to provide the desired output on others. Specifically, some systems return only the Avail instead of the Use%, leading to frustration and inconsistency.

Desired Output

What we want is a shell command that consistently provides the Use% for any mount point without the hassle of different outputs across various hosts.

The Solution: A General Host Agnostic Command

To tackle this variability, we can use an enhanced awk command. This command is structured to be host agnostic, meaning it'll work regardless of the specific nuances of the host system.

The Command Breakdown

[[See Video to Reveal this Text or Code Snippet]]

How It Works:

Iterate Through Fields: The command uses a loop to scan through each field in the output of df -hT.

Capturing the Field Number: When it finds a field that matches Use%, it captures the field number in a variable called u.

Skipping the Header: The condition NR>1 ensures that we only process the actual data lines and skips the header.

Removing the % Symbol: The command substitutes the % character with an empty string using sub(/%/,"",$u).

Output: Finally, it prints only the extracted value of Use%.

Example Output

When you run this command, it will reliably give you the percentage of used space for all mounted filesystems, allowing you to easily keep track of your filesystem usage.

Conclusion

By using the above command, you can efficiently extract the Use% for any mount point in OEL without worrying about variations among hosts. It's a handy tool for system administrators and anyone managing servers, providing an effective solution for monitoring disk usage.

With this guide, you should now have a reliable way to keep tabs on your system's disk usage. If you have any other shell-related questions, feel free to ask!