how to check mod_deflate is enabled in apache?

Question

Is there a command line command that can tell whether or not mod deflate is running on Apache?

In what context? The web server config, a cgi script...? – Anders Lindahl Jun 09 '09 at 13:40 — Anders Lindahl, Jun 09 '09 at 13:40
A command... where? In htaccess? Please be more specific. – brettkelly Jun 09 '09 at 13:40 — brettkelly, Jun 09 '09 at 13:40
All that can answer to the point is a good answer – omg Jun 09 '09 at 13:43 — omg, Jun 09 '09 at 13:43

score 38 · Answer 1 · edited Nov 04 '14 at 15:59

38

It is probably to late, but here we go.

mod_deflate is enabled per default. To be sure, try

debian / ubuntu: apache2ctl -t -D DUMP_MODULES

CentOS: httpd -t -D DUMP_MODULES

and look if there is a deflate_module.

edited Nov 04 '14 at 15:59

Eva

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answered Jul 05 '10 at 09:42

Juri Glass

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I had to use just 'apachectl' without the '2'. – Drew Nov 10 '12 at 01:55

score 29 · Answer 2 · answered Jun 09 '09 at 13:51

29

You can verify mod_deflate with this site:

mod_deflate test

My site gets a nice little report that shows I'm saving 81% of my bandwidth!

answered Jun 09 '09 at 13:51

dicroce

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This tool tests whether either mod_gzip, deflate or any other compression tool is working on the server, not just mod_deflate. – rhand Jan 06 '16 at 06:12

karim79 · Answer 3 · 2009-06-09T13:49:41.003

7

You'll want to make sure the following line is present (and not commented out) in your apache configuration (httpd.conf):

LoadModule deflate_module modules/mod_deflate.so

The commented out version looks like:

# LoadModule deflate_module modules/mod_deflate.so

Then to have it deflate files as they are served, you'll need a line in your .htaccess, like this:

AddOutputFilterByType DEFLATE text/html text/css text/plain text/xml application/x-javascript

edited Jun 09 '09 at 13:49

answered Jun 09 '09 at 13:43

karim79

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Seems this module is automatically built-in if there is --enable-deflate option. – omg Jun 09 '09 at 17:45
@karim79, I cannot find `httpd.conf`, my apache's version 2.4? – Imanali Mamadiev Jan 16 '18 at 11:15

score 5 · Answer 4 · answered Jun 09 '09 at 14:49

I agree with the comments 'in what context' but to cover all bases (in addition to the other responses) you may also be able to run;

a2enmod deflate

This should work on many servers that run Apache (especially Debian based ones), in the event the module is already enabled the command will tell you, if the module isn't enabled the command will enable it. It may also tell you that the module doesn't exist in which case you will need to install it.

score 0 · Answer 5 · answered Dec 22 '20 at 10:05

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You can view all modules loaded in Apache with this command:

apache2ctl -M

answered Dec 22 '20 at 10:05

Víctor Iglesias Castán

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score -1 · Answer 6 · answered Jun 04 '14 at 16:19

Like said, we need precisions.

If you're using debian, you can enable this mode like this.

//List all available mods
cd /etc/apache2/mods-avaliable

//Enable module - if you need to enable another module, just replace "deflate"
a2enmod deflate

//restart apache
service apache2 restart

//Check that module is effectively enabled
cd /etc/apache2/mods-enabled

ls -al

That's all for linux debian environment.

how to check mod_deflate is enabled in apache?

6 Answers6

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