topic Re: Where's the cache in Operating System - Linux

Where's the cache

Vernon Brown_4 — Mon, 19 Apr 2004 12:14:44 GMT

catalog.htm at this URL is missing the beginning tag when I get it. As a result my Linux browser does not show it as a web page. The State's webmaster for their (state of Arkansas) Apache servers emailed me the copy of catalog.htm that is on their server and the tag is there.

http://www.state.ar.us/land/catalog.htm

How can we go about finding where the bad copy is cached?
Is there a way to cause the cache to be updated ?
How can I know if the cached file is from my own server?

Thanks and points for answers !!

Vern

Re: Where's the cache

Steven E. Protter — Mon, 19 Apr 2004 13:07:46 GMT

Browser cache is stored depending on browser.

For mozilla/netscape etc check edit preferences advanced cache

You can see where it is and clear it with the command prompt. Newer browsers have a button in there to clear the cache.

SEP

Re: Where's the cache

Paul Cross_1 — Mon, 19 Apr 2004 13:21:24 GMT

for explorer....

Tools->internet options->temporary internet files->settings, change "Check for newer versions of stored pages:" to "Every visit to the page"...

Re: Where's the cache

Vernon Brown_4 — Mon, 19 Apr 2004 13:35:28 GMT

I have cleared the temporary files on the three browsers; IE on Windows; Epiphany in Gnome; and Konqueror in KDE. Queston: Do you see the beginning tag on the file (link above)
My access goes through my LAN served by Apache which acts as a proxy for my internet access. The State also runs Apache where the file is served from.
I'm not sure how their their LAN is set up.

My Apache is running DNS; I have rebooted my server but am not sure if that clears the cache.

Vern

Re: Where's the cache

Paul Cross_1 — Mon, 19 Apr 2004 14:11:39 GMT

Yes, here is what I see...

<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />

***SNIP***

Maybe you have a web proxy somewhere in the mix?

Re: Where's the cache

Paul Cross_1 — Mon, 19 Apr 2004 14:20:05 GMT

Let me rephrase!

Maybe you have a web cache somewhere in the mix?

Re: Where's the cache

Vernon Brown_4 — Mon, 19 Apr 2004 14:26:28 GMT

Thanks Paul; that tells me that the cache is probably on my local LAN server.

Does anyone know how to flush the BIND cache ??

Or how to clear it ?

Vern

Re: Where's the cache

Martin P.J. Zinser — Mon, 19 Apr 2004 14:38:15 GMT

Hello Vernon,

checked the source from here too, comes with the at the start as expected. Since you did already clear the cache of your browser, the corruption must be on one of the stations in between. This might be the proxy of your organisation (where you still might have a chance to ask them to clear it) or a cache run by your direct or an up-stream ISP. If that is the case pretty much the only thing you can do is to wait until the entry times out from the cache.

Greetings, Martin

Re: Where's the cache

Vernon Brown_4 — Mon, 19 Apr 2004 14:48:43 GMT

I have control of my local LAN's Apache and DNS server. I stopped named on my local LAN server; still got the catalog.htm without the beginning tag.

Guess I'll just have to wait for the cached file to time out.

Thanks for all your help !

Vrn

Re: Where's the cache

U.SivaKumar_2 — Tue, 20 Apr 2004 05:25:48 GMT

Hi,

Have you tried to clear your browser cache ?.

your ISP will also run Caches to improve performance. In that case , you will have to wait until the cached version expires.

regards,

U.SivaKumar.

Re: Where's the cache

Vernon Brown_4 — Tue, 20 Apr 2004 07:19:23 GMT

Thanks ! Yep; browser cache was the first thing I checked.

This morning I find that the problem has cleared up. Guess the TTL finaly expired on the cached file.

Vern

Re: Where's the cache

Celso Medina Kern — Tue, 20 Apr 2004 09:10:57 GMT

Vern,

As a comment, DNS/BIND does not cache information about the content os received web pages. The cached durty page surely was recorded in your web proxy, which you can discover in the browser configuration. If there is no proxy explicitly set, your firewall is redirecting the outgoing http service transparently to a web proxy. As you saw, the page was update automatically in this device.

Regards,

Celso

Re: Where's the cache

Vernon Brown_4 — Tue, 20 Apr 2004 09:35:09 GMT

Thanks; I did notice that the dirty page only showed up when I accessed the site through my LAN proxy server. The page was clean when accessed from the same LAN via MASQUERADE in iptables. (browser proxy off)