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How To Check Disk Usage of Your Network Using SSH

Ubuntu 11

In this article, we will explore how to check the disk usage of your network using SSH. This is a crucial task for system administrators to ensure efficient resource allocation and prevent potential system failures due to disk space exhaustion.

Quick Answer

To check the disk usage of your network using SSH, you can use the df and du commands. The df command shows the amount of disk space used and available on Linux and Unix-based systems, while the du command estimates and displays the disk space used by files and directories. These commands can be executed on a remote server via SSH to monitor disk usage.

Understanding SSH

SSH, or Secure Shell, is a cryptographic network protocol that allows secure remote login from one computer to another. It provides strong password authentication and secure encrypted data communications between two computers connecting over an insecure network.

Checking Disk Usage

There are two primary commands used to check disk usage in Unix-like operating systems: df and du.

The df Command

The df (disk filesystem) command is used to check the amount of disk space used and available on Linux and Unix-based systems.

Here is how you can use the df command:

df -h

The -h option stands for “human-readable”, and it displays the disk space statistics in a format that is easier to understand (i.e., in bytes, kilobytes, megabytes, gigabytes).

To check the disk usage on a remote server via SSH, you can use the following command:

ssh user@host "df -h"

Replace user with your username and host with the hostname or IP address of the remote server. This command will display the free space, used space, and total space for each partition on the remote server.

The du Command

The du (disk usage) command estimates and displays the disk space used by files and directories.

Here is how you can use the du command:

du -h

The -h option, like in the df command, stands for “human-readable”, and it displays the disk space used by files and directories in a format that is easier to understand.

If you want to show a disk usage summary for the current directory, you can use the du -sh command. The -s option stands for “summary”. This command will display the total disk space used by the current directory and its subdirectories.

Monitoring Disk Usage Across Multiple Servers

For monitoring disk usage across multiple servers in a network, consider using network monitoring tools like Nagios, Zabbix, or Cacti. These tools provide comprehensive monitoring capabilities and can be set up to regularly collect and report disk usage data.

Alternatively, you can set up a cron script to email you the disk usage data per server. This approach doesn’t require password or key logins, making it a safer option.

Conclusion

Checking disk usage of your network using SSH is a fundamental skill for any system administrator. Regular monitoring can help prevent system failures and ensure efficient resource allocation. Remember, the df and du commands are your friends for this task. For more extensive monitoring, consider using dedicated network monitoring tools.

What is SSH?

SSH stands for Secure Shell, which is a cryptographic network protocol that allows secure remote login from one computer to another. It provides strong password authentication and secure encrypted data communications between two computers connecting over an insecure network.

How do I check disk usage using SSH?

To check disk usage using SSH, you can use the df command. By running the command df -h, you can view the disk space used and available on Linux and Unix-based systems in a human-readable format. Additionally, you can use the du command to estimate and display the disk space used by files and directories. The command du -h will show the disk space usage in a more understandable format.

How can I check disk usage on a remote server via SSH?

To check disk usage on a remote server via SSH, you can use the command ssh user@host "df -h", replacing user with your username and host with the hostname or IP address of the remote server. This command will display the free space, used space, and total space for each partition on the remote server.

What are some network monitoring tools for monitoring disk usage across multiple servers?

Some popular network monitoring tools for monitoring disk usage across multiple servers are Nagios, Zabbix, and Cacti. These tools provide comprehensive monitoring capabilities and can be set up to regularly collect and report disk usage data.

Is there an alternative to network monitoring tools for monitoring disk usage across multiple servers?

Yes, you can set up a cron script to email you the disk usage data per server. This approach doesn’t require password or key logins, making it a safer option.

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