flushing dns cache

DNS will not flush

location: ubuntuforums.com - date: June 13, 2009
I have a question about the best way to completely clear cache in linux. Installed wordpress in a subdir, set dns, waited some time, till the nameservers were set, pinged domain --pinged fine to new hosting provider. Logged into CP on new server, and noticed announcement that the domain had expired. I was like what the heck?!? So I contacted onandone (registrar & previous host) to ask about it. They said that it was set to autorenew. Well, from what bluehost told me (new hosting provider) the domain had expired and was re-registered. Unfortunately, this was right about the time when I set the WP to point to the original domain instead of the subdir. Now when I go to the domain, it's displaying the cached version and when I ping it from linux it points to oneandone. When I do all of this from windows, everything works fine. I've cleared my firefox cache, and also did /etc/init.d/dns-clean start, and rebooted my system. I can't even point to the subfolder anymore. When I try to

DNS Flush in Maverick

location: ubuntuforums.com - date: October 21, 2010
Hello, I've been having a baffling problem in Maverick (which has otherwise performed flawlessly, thanks, Devs!) I connect fine to everything on the Internet--except to my account at my ISP. I can connect to my email account neither via Thunderbird nor via Firefox. I have Lucid installed on another partition and it connects normally via both Thunderbird and Firefox. I've troubleshot this extensively with a tech at my ISP. At one point he suggested DNS flushing. So I installed nscd and followed with 'sudo /etc/init.d/nscd restart'. No luck. Then I restarted Maverick and, hey presto! I could connect. When I logged on today, I had the same problem, ran 'sudo /etc/init.d/nscd restart' again--no luck--restarted and I could connect again. So it seems that every time I want to connect to my email, I have to run 'sudo /etc/init.d/nscd restart' and then restart the computer. Any ideas? I'd greatly appreciate any advice. Thanks in Advance, mike

DNS resolving Ubuntu 13.04 (64bit)

location: ubuntuforums.com - date: April 28, 2013
Hi everybody, First of all, this is my first post, since I managed to solve all other problems I ever had using Ubuntu by other post on this forum (Thanks for that by the way!), but this time I didn't find the solution, so if the post in the wrong location: sorry! After a fresh install of Ubuntu Desktop 13.04 (64-bit) on a pc that previously had Ubuntu 12.10 installed, my DNS resolving is giving some strange issues. In short, I can't ping a host name of an internal device, but I can ping the ip address. This only happens internally, so pinging www.google.com or 173.194.78.99 works OK. In the morning, before the upgrade, it worked perfectly and after the upgrade, it doesn't work at all. I've got a home server running Ubuntu Server 12.04.2 LTS OS with two virtual machines: dns1 (primary master) and dns2 (secondary master), both are using Bind9 for internal DNS resolving and caching, also running Ubuntu Server 12.04.2 LTS. Both the servers are working without issues, since on other dev

DNS Changer on Ubuntu 12.04

location: ubuntuforums.com - date: June 8, 2012
Hello everybody, I have got the following problem: I have visited the following webpage (http://www.dns-ok.us) and it said that my pc is infected with DNS Changer virus. Please, is there anyone who can help me to remove that virus? I have got Ubuntu 12.04 on my pc. PS. I found solutions for Windows, but could not find for Linux.

[SOLVED] No browsing flush DNS?

location: linuxquestions.com - date: November 15, 2011
Today, I load up Ubuntu as normal, but although my web browser will display my router's "admin page" (like it normally would) where I can see total amount downloaded etc, it refuses to browse to any other page on the internet. Evolution does not want to get my emails either. However, Transmission is okay downloading and uploading files/torrents. Router seems logged onto internet okay, so clearly I'm connected to something. Neither Firefox nor Chrome will bring up any web content. However, my system is dual-boot so on loading into Windows XP to see what happens, browsing is normal, no problems. In fact I am typing this message from Windows - no choice! I remember something about a "DNS cache" being corrupted as being the reason for browsing not being possible sometimes; however one website says "Ubuntu doesn't cache DNS records by default so unless you've installed a dns cache there isn't anything to clear". So, given my inability to surf in Ubuntu,

clearing cache on squid proxy

location: linuxquestions.com - date: September 1, 2005
Pls. help i would like to check how to clear cache in squid proxy server. thnx

displaying the BIND 9 cache

location: linuxquestions.com - date: December 9, 2005
hi there, I have a simple question (I think) but I can't find the answer right now. How can I display the cache of the DNS BIND-9.2? I want to see what it has cached. Thanks

slow DNS resolution in Ubuntu

location: linuxquestions.com - date: August 26, 2005
I encounter slow domain name resolution in mozilla firefox. My system is UBUNTU 2.6.10-5-686 kernel.. THe network schema is ADSL modem >> TLink -WR541G router >> my computer. The model of my computer is IBM thinkpad T21, with dual system of Ubuntu and Winxp. My problem is that it takes me a very long time to resolve a domain name (in the status bar of firefox, the words "looking up ....domain name..." stay for a long time. Quite often, the name was not resolved and timed out. I tried to ping google or yahoo website, it is slow, sometime, timed out. I have searched the posts and confirned that modifying the file /etc/resolv.conf did not help (not matter I change it to previous one plus 192.168.1.1 or not). THe IP address is the same as the DNS server displayed using ipconfig /all in Winxp. Now the thing is that Winxp can resolve simialr webiste quite fast. (note, in order my network (non-wireless one, eth0) card to work, I add apci=off in menu

How to find my IP, DNS..?

location: ubuntuforums.com - date: January 28, 2010
I'd like to find my DNS Server. To be able to run so other programs... I typed in Terminal: [email protected]:~$ route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 24.141.16.0 0.0.0.0 255.255.240.0 U 1 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth0 0.0.0.0 24.141.16.1 0.0.0.0 UG 0 0 0 eth0 [email protected]:~$ route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 24.141.16.0 * 255.255.240.0 U 1 0 0 eth0 link-local * 255.255.0.0 U 1000 0 0 eth0 default d24-141-16-1.ho 0.0.0.0 UG 0 0 0 eth0 If anyone could help that would be great. Also, I'm a newbie, so I need step by step. Thanx.

using ifconfig to find ip of my dns server

location: ubuntuforums.com - date: June 21, 2012
I run ifconfig to find the ip address of my dns and I see something like this: inet 192.168.2.2 netmask 0xffffff00 broadcast 192.168.2.255 inet 172.16.227.1 netmask 0xffffff00 broadcast 172.16.227.255 what's the difference?