Flush dns to get a new name resolution. Also flush dns cache when you can’t access a newly registered domain name. You can simply flush your dns cache anytime to get new entry. So, Flush your dns cache now.
To flush DNS cache in Microsoft Windows (Win XP, Win ME, Win 2000):-
– Start -> Run -> type cmd
– in command prompt, type ipconfig /flushdns
– Done! You Window DNS cache has just been flush.
To flush the DNS cache in Linux, restart the nscd daemon:-
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– To restart the nscd daemon, type /etc/rc.d/init.d/nscd restart in your terminal
– Once you run the command your linux DNS cache will flush.
To flush the DNS cache in Mac OS X Leopard:-
– type lookupd -flushcache in your terminal to flush the DNS resolver cache.
ex: bash-2.05a$ lookupd -flushcache
– Once you run the command your DNS cache (in Mac OS X) will flush.
To flush the DNS cache in Mac OS X:-
– type dscacheutil -flushcache in your terminal to flush the DNS resolver cache.
ex: bash-2.05a$ dscacheutil -flushcache
– Once you run the command your DNS cache (in Mac OS X Leopard) will flush.
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/etc/init.d/nscd reload
will clear the cache without having to brute with a /etc/init.d/networking restart
Was in the need for this for Mac, found your page as the first Google result 🙂 Thank you!
on SLES 10
rcnscd restart
This really worked for me. Sometimes clearing DNS cache will help you see the recent changes made to any site you visit.
Hey,
I mistakenly typed dscacheutil – flushcache. I put a dash and a space after it. Now is that an issue or something. Is there any way I can undo that.
Hope to hear soon.
Thanks
other comments on Linux flushing are correct. simply restarting nscd will *NOT* flush the cache.
# nscd -i hosts
will invalidate the hosts table on CentOS/RHEL, but *ONLY* if the daemon is running in the first place. so don’t bother restarting, stopping or starting.
just run this – as Wes has already said.
The Linux variant is just wrong. I don’t know of *any* distribution that’s using nscd as default, Darkmage’s variant only works for Debian(+based?), and some distributions don’t have any builtin mechanism at all.
Please make clear for which distributions your code works, and don’t claim it works “in Linux”. It doesn’t.
The Linux command listed does not work on RHEL/CentOS. Here’s the correct command:
nscd -i hosts
The instructions for Linux are incorrect. The Linux kernel does not do DNS caching. User applications do, such as nscd daemon, but if you didn’t install it in the first place, your not running it, since it is not part of the standard setup. Applications such as Firefox also perform DNS caching by default.
These instructions for Mac OS X and Leopard are mixed up
To flush the DNS cache in Mac OS X Leopard:-
– type lookupd -flushcache in your terminal to flush the DNS resolver cache.
ex: bash-2.05a$ lookupd -flushcache
– Once you run the command your DNS cache (in Mac OS X) will flush. <——-
To flush the DNS cache in Mac OS X:-
– type dscacheutil -flushcache in your terminal to flush the DNS resolver cache.
ex: bash-2.05a$ dscacheutil -flushcache
– Once you run the command your DNS cache (in Mac OS X Leopard) will flush. < ——
For linux this is the proper one: sudo /etc/init.d/dns-clean start
I believe you have the instructions for OSX and OSX-Leopard+ backwards. dscacheutil -flushcache is used in Leopard and SnowLeopard.
its not working on RHEL, enen though i have restarted, named, network service and nsdc.
thanks
even tried lookupd -flushcache, still aint working.
i cant seem to flush on my mac 10.4
typed in dscacheutil -flushcache in terminal
but says, command not found?
@Dad, kyle, daftwill123, and SoGua: should probably be *restart* the “DNS Client” service. If it isn’t already started then the service would have been disabled and there’s nothing to flush. Best to also check that the service is set to start on startup within the Right-click Properties dialog box.
@sweet bunny: I don’t believe any Windows versions prior to Windows 2000 did any caching at all without specifically installing a DNS caching service. Chances are the issue was with an upstream DNS server or maybe your firefox cache as per. See below or SoGua’s comment from August 7th 2007.
Re nscd, many *nix distros don’t have nscd installed by default. If “nscd -i hosts” doesn’t clear the cache (that’s the correct way to flush it btw) then installing it won’t help you except to install an empty cache. Also, there could be other daemons installed instead of nscd, dnsmasq or bind for example (Bind is generally not the best for a desktop – but is still installed on a lot of servers). Bind’s cache can be flushed with “rndc flush”. Dnsmasq I believe has to be restarted for the cache to be flushed.
Lastly, there’s also a lot of upstream cached records that might be totally outside of your control. In case your current DNS server has the incorrect info cached, try changing your caching DNS server settings in your Network Settings to use a different server.
Thank you!!!
Ok here’s another solution: Go to Control Panel -> Administrative tools -> Services and look for “DNS Client” and right click on it and Select Start. Once DNS client started you can try to flush the DNS again.
Thanks for the advice. I’ve ran anti-virus many many times, cleared out the system over and over of both spyware and virus and still having trouble. It might be so deep into the system though my protection programs aren’t picking them up. I’m using the latest versions of AVG Free (AVG 8) and Spyware search and destroy.
Hi daftwill123, i suspect your PC was infected by virus.
Do a full system scan with your anti virus.
Here’s a free antivirus
http://www.techiecorner.com/102/avast-anti-virus-free-anti-virus-software/
http://www.techiecorner.com/166/avast-how-to-schedule-boot-time-scan-before-window-start/
I’ve get the same error message as Dad:
C:\WINDOWS\Dad>ipconfig/flushdns
Windows IP Configuration
Could not flush the DNS Resolver Cache: Function failed during execution.
C:\WINDOWS\
I tried what Kyle said and it pretty much changed nothing. Though he said something about Windows Vista and both me and Dad are on XP. I’m trying to do this to see if it will let me re-connect to google because I can’t connect to google and so far only google. If any of you got suggestions on that too, to help me re-connect, that’d be awesome.
For all the Windows people the command is:
ipconfig \flushdns
Everyone has the slash the wrong way
Debian 4.0 Konsole
/etc/init.d/networking restart
you have the leopard / non-leopard instructions backwards – pre-leopard uses lookupd
I had the same issue after I installed BIND 9 and racked my brains as a deconstructed my setup on my Ubuntu system. Finally tried editing /etc/hosts and found my localhost entry munged and repaired it. FireFox instantly began resolving again. Go figure. Note that I did retain the DNS server on board – Also, I found that you can use the “PortableApps” Firefox browser with Wine to work as a spare tire of sorts, since it was what got me through this. Just have Wine installed and then use the PortableApps Firefox browser.
Good luck.
Jon
I can’t flush my dns cache in win98.
ipconfig/flushdns is a bad command
I am unable to get to certain websites on both ie and firefox
I was able to get to the sites at one time, but once I get the server not found message i can’t get to the site.
Thanks for any help
Ryan,
that’s because the headings for the two Mac OS X commands are around the wrong way.
If you’re using 10.5, use: dscacheutil -flushcache
Also, you want everything after the $ sign. The rest is what is written before the command prompt.
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bash-2.05a$ lookupd -flushcache
When I try this on my Mac I get a command not found?
ryan-imac:~ ryan$ bash-2.05a$ lookupd -flushcache
-bash: bash-2.05a$: command not found
ryan-imac:~ ryan$
in MacOSX Leopard 10.5.2 its :
dscacheutil -flushcache
/etc/init.d/network restart
Will clear the cache on Linux.
Hey dad.. try this.
1. Click the Microsoft Vista Start logo in the bottom left corner of the screen
2. Click All Programs
3. Click Accessories
4. RIGHT-click on Command Prompt
5. Select Run As Administrator
6. In the command window type the following and then hit enter: ipconfig /flushdns
7. You will see the following confirmation:
Windows IP Configuration
Successfully flushed the DNS Resolver Cache.
Sam, which version of firefox has that option?
I cannot locate it in my about:config
Can someone help…! I can’t Clear my Cache…
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\Documents and Settings\Dad>ipconfig /flushdns
Windows IP Configuration
Could not flush the DNS Resolver Cache: Function failed during execution.
C:\Documents and Settings\Dad>
Hello Sir………..
To whom ever it may concern……………
Can you give me a solution for this………
Here we are using Terminal server with more than 50 clients at a time……..
but when i shutdown and restart that server then it will shows some errors
“IEXPLORER has encounter a problem”…………. Please can you give me a solution for this…………….. And we are using Domain environment also. Please give a solution for this……
firefox’s about:config has an option: network.dnsCacheEntries
setting this to 0 will disable the cache and fallback to the local DNS cache.
Normally the internal firefox cache will be clear once you close all the browser.
i think gabriel means the internal firefox dns cache (yes firefox has it’s own dns cache… unnecessarily)
but i don’t know how to flush it… the only thing i can change, is the expiration interval.
gabriel: this only flush ur pc dns cache. if you wan to clear Firefox internal cache, you can open firefox -> Tools -> Clear Private Data (Check the cache) and click “Clear Private Data Now”
this does NOT flush firefox internal cache.
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ipconfig /flushDNS dos not work with Windows 9x\ME
On my Debian machine, the nscd daemon is not installed by default. (/etc/rc.d/init.d/nscd missing)
Description:
A daemon which handles passwd, group and host lookups
for running programs and caches the results for the next
query. You should install this package only if you use
slow Services like LDAP, NIS or NIS+
So i think “/etc/init.d/network restart” does also clear the cache. Does anyone know a better solution, let me know