Unable to permanently adjust hard/soft open files limit on Debian 12 with kernel 6.1.0-32-amd64

Abstract: This article provides a solution to the issue of being unable to permanently adjust the hard and soft open files limit on a Debian 12 workstation running kernel 6.1.0-32-amd64, despite having more than sufficient memory.

Created: 2025-03-25 by UserComp.com Editors

On a workstation running Debian 12 kernel 6.1.0-32-amd64, you can increase the number of open files without encountering any issues due to the 192GB DDR3 memory. To set the soft limit, follow these steps:

Open a terminal.
Run the command:
```
sudo sysctl -w fs.file-max=1000000
```
This command sets the soft limit for the number of open files to 1,000,000.
To make the change permanent, add the following line to the /etc/sysctl.conf file:
```
fs.file-max=1000000
```
Save and close the file.
To reload the sysctl.conf file and apply the changes, run the command:
```
sudo sysctl -p /etc/sysctl.conf
```

Now, you have successfully increased the soft limit for the number of open files on your Debian 12 workstation.

References

Tags: Linux Debian Kernel Open files limit

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