flushing dns cache

[SOLVED] Squid cache error

location: linuxquestions.com - date: December 18, 2012
hi guyz, am a newbie to ubuntu system, though i know basic commands, i have installed squid3 proxy on ubuntu 12 lts server, connected to mikrotic in tansparent mode, my system has been working well, till i tried to check for cached items, from the cache.log, from it i got the following: intercept.cc(137) netfilterinterception nf getsockopt(so_original_dst) failed on FD 264: (92) Protocol not available, how do i correct this? thans in advance

update cache blocked

location: linuxquestions.com - date: September 17, 2013
On ubuntu 13.04 cache for incoming update is stuck. Second time, I think both times was due to broadband interruption during updating process. Only time ever this problem, same computer Dell bargain buy made in China. Don't even know the model name. I was instructed to sudo apt-get clean, which did not work. Then got feedback that I should use sudo apt-get auto "something or other" and on first time this worked. I wrote it down and lost it. Been searching lists and cannot find it. Tried autoclean and a couple of others that seemed close but this is not horseshoes, is it? I've just recently been pushed into going all three computers on ubuntu, by two vista system crashes, unrepairable, not sorry, Just can't clear this problem. Get not enough memory message and tells me to clean up. Been using ubuntu for four years but obviously haven't learned enough. It will upgrade and update in terminal. But wonder what will happen next time I don't catch the update soon enough and it c

11.04 DNS errors

location: ubuntuforums.com - date: May 12, 2011
I have recently upgraded to the new ubuntu 11.04 but am having problems with the internet. Often When I try to access a website it takes a long time (5-10 minutes) to load even google, and sometimes I just get the following error message: This web page is not available The server at google.com can't be found because the DNS lookup failed. DNS is the web service that translates a website's name to its Internet address. This error is most often caused by having no connection to the Internet or a misconfigured network. It can also be caused by an unresponsive DNS server or a firewall preventing Chromium from accessing the network. Here are some suggestions: Reload this web page later. Check your Internet connection. Reboot any routers, modems or other network devices that you may be using. Check your DNS settings. Contact your network administrator if you're not sure what this means. Try disabling DNS prefetching by following these steps: Go to Spanner m

DNS error

location: ubuntuforums.com - date: June 12, 2013
i am new to Ubuntu.I use ubuntu 12.04.my network manager detected my 3g dongle well,but then it doesn't detect my huawei E303 dongle and i cant connect with internet ,then i installed wvdial and it detects my dongle.But when i try to connect to internet chrome shows error 105(dns error) and firefox also,but i can use skype without any problem, here is my wvdial.conf [Dialer Defaults] Init1 = ATZ Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 Init3 = AT+CGDCONT=1,"IP","mobitel3g" Auto DNS = 1 Password = { } Phone = *99***1# Modem Type = Analog Modem Stupid Mode = 1 Baud = 9600 ;Baud = 9600 Dial Command = ATDT Modem = /dev/ttyUSB_utps_modem ISDN = 0 Username = { } Carrier Check = yes Check DNS = 1 First DNS = 1 Second DNS = 1 my resolv.conf is empty here is my networkmanager.conf [main] plugins=ifupdown,keyfile dns=dnsmasq no-auto-default=38:60:77:06:6B:97, [ifupdown] managed=false i tried lot of things by refering forums,but i couldn,t solve this,if someone can

Squid/DNS Intermittent Issue

location: linuxquestions.com - date: July 23, 2005
squid 2.5.STABLE10 (localhost) on slackware 10.1... i am getting an intermittent/sporadic squid DNS error when surfing the web (through squid)... it will happen with known good URLs and when it happens the "outage" only lasts less than a minute... the URL works fine if accessed directly without the proxy... the error message is usually the classic squid "name error... the cache was unable to resolve, blah blah blah"... the squid access log shows that there's TCP_MISS/503 errors when the problem occurs... AFAIK everything looks as if it was an invalid URL during the outage - but once again, the URLs are known good and perfectly accessible using non-squid means at the exact same moment in which squid is giving the dns error... as for troubleshooting, i've played with the conf file a lot, and recompiled squid several times, stripping it down a little more each time, tinkering with the configure options - the problem is not affected... BTW, i've compiled squid

dns 323 stopped mounting samba/cifs error 6

location: ubuntuforums.com - date: November 22, 2008
I've had a DNS 323 mounted to the filesystem with cifs and fstab for 6 months. the NAS has firmware version 1.05 and i'm running hardy 8.04. Lately I've been having issues where I get "Permission denied" issues when trying to unpack .rar files downloaded with the built-in bittorrent client on the NAS. These stick around a while then eventually go away with no explanation. Today my system stopped seeing the NAS. I can ping it, and I can access the admin website and FTP to it, but I cannot connect to it as a windows share or mount it. My XBOX still sees it too. I've tried tweaking the fstab line, mounting from the command line using smbmount, mount.cifs and mount commands. It previously gave me permissions error with mount error 13. I restored factory settings on the NAS and reset all the user privileges from the admin page. Now it gives me :~$ smbmount //140.180.129.69/Volume_1 /media/NAS -o user=dstrife,pass=XXXXX 0 0 retrying with upper case share name mount er

[SOLVED] Firefox Cache for flv files

location: linuxquestions.com - date: November 27, 2010
just downloaded and am running Linux Mint x64 on my desktop PC. I got tired of the bugs in the 64-bit Ubuntu 10, so I switched. So far, I am really liking this. I do have a question: I used to save some of the Flash movies stored on my hard drive in Ubuntu the tmp folder, and I know adobe 10 stores them in Firefox Cache now; how can I save them to my HDD now? I added the Firefox add-on for downloading Flash videos, but when I think I should be downloading a video, I don't get the "Blue Button" per the help guide. This is Youtube Downloader 2.0.15 Maybe I added the wrong add-on for this? This is not the end of the world, there is alway a "work-around." Your ideas are appreciated,,,,,,,,

DNS reverse lookup not working..

location: linux.com - date: September 7, 2009
I have done all that correctly. but the problem exists. Now i tried to re-configure it all-- Now My internal IP is 192.168.70.1 I wanna configure DNS for users in my subnet (internally). The hostname is -- myserver.dypcoe.com domainname-- dypcoe.com entries in named.conf are:-- options { listen-on port 53 { any; }; # listen-on-v6 port 53 { ::1; }; directory "/var/named"; dump-file "/var/named/data/cache_dump.db"; statistics-file "/var/named/data/named_stats.txt"; memstatistics-file "/var/named/data/named_mem_stats.txt"; query-source port 53; query-source-v6 port 53; allow-query { any; }; }; zone "." IN { type hint; file "named.ca"; }; zone "localdomain" IN { type master; file "localdomain.zone"; allow-update { none; }; }; zone "localhost" IN { type master; file "localhost.zone"; allow-update { none; }; }; zone "0.0.127.in-addr.arpa" I

ipv6 disabled; dns query is still AAAA

location: ubuntuforums.com - date: June 7, 2012
i disabled ipv6 on my machine: it has no ipv6 address. but still the dns queries ($ hostname -f or $ sudo) are issued as AAAA queries. how can i prevent that from happening and sending out A queries only? i tried to tamper a bit with /etc/gai.conf but to no avail so far. any ideas? ...this is on ubuntu 12.04.

NetworkManager + dnsmasq = periodic loss of DNS

location: ubuntuforums.com - date: December 28, 2012
Greetings, System information: Code: $ uname -a && cat /etc/*release Linux pixel 3.6.10-030610-generic #201212101650 SMP Mon Dec 10 21:51:40 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux DISTRIB_ID=Ubuntu DISTRIB_RELEASE=12.04 DISTRIB_CODENAME=precise DISTRIB_DESCRIPTION="Ubuntu 12.04.1 LTS" NAME="Ubuntu" VERSION="12.04.1 LTS, Precise Pangolin" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Ubuntu precise (12.04.1 LTS)" VERSION_ID="12.04" I've been having trouble recently with my network in that, at "random" times, I will lose DNS lookup capability (and thus, a slew of other resulting problems). When this happens, I usually noticed it via web-browsing, but since I wanted to capture precise times this would occur, I wrote a simple cronjob to (every minute) run a DNS lookup of 'google.com' and log whenever DNS would fail. Excerpt from log: Thu Dec 27 18:54:11 EST 2012 - DNS lookup fail