Prepositions with nouns

"On server" or "of server"?

On server is common for location in computing. Of server is not usually a fixed combination and normally appears inside a larger phrase such as the capacity of the server.

Quick answer

Which phrase is correct?

Use on server to describe location or activity happening on a computer server. Of server is uncommon as a direct combination; it usually follows another noun or adjective.

The files are stored on the server.
We installed the update on the server last night.
The performance of the server improved after maintenance.

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
on server

Location in a computing environment

Use on server when something exists, runs, or happens on a server.

The application runs on the server.
User data is backed up on the server every day.
2
of the server

Possession or characteristics

Use of the server after another noun to describe a quality, part, or feature.

The memory of the server was upgraded.
The security of the server is regularly tested.

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
on server
The database is hosted on the server.
Correct for digital location or activity.
of server
The speed of the server affects loading time.
Used after another noun; not usually a standalone phrase.
in server
The fault was found in the server cabinet.
In refers to physical inside location, not the normal computing platform expression.

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Using of server as a location phrase

Of does not normally express where software or files are located.

✕ The files are saved of server. ✓ The files are saved on the server.

Omitting the article

Server often needs an article in general statements.

✕ The app runs on server. ✓ The app runs on the server.

Quick practice

Choose the expression that matches the intended meaning.

1. The website is hosted ___ the server.
2. The temperature ___ the server was too high.
3. We installed new software ___ the server.

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Frequently asked questions

Is on server correct without the article?

In technical notes, writers sometimes omit the article, but on the server is more natural in standard English.

Can of server be correct?

Yes, when it follows another noun, as in the name of the server or the speed of the server.

Should I use in server or on server?

Use on server for computing platforms. Use in the server only for physical inside location.

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