CentOS 5 :: Nscd > Millions Of Log Entries Like 'Reloading "[ip Address]" In Hosts Cache!'
May 25, 2011
I'm getting millions of log entries in my nscd.log like the ones below. There's no connection to (or from) this IP address so I'm totally at a loss for what would cause this.
Wed 25 May 2011 06:56:49 PM GMT - 5557: Reloading "65.83.237.34" in hosts cache!
Wed 25 May 2011 06:56:49 PM GMT - 5557: Reloading "65.83.237.34" in hosts cache!
Wed 25 May 2011 06:56:49 PM GMT - 5557: Reloading "65.83.237.34" in hosts cache!
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Mar 1, 2009
I have Celeron 2800D, 512 RAM (2 slots 256 each). I'm trying to install CentOS 5.2, it asks me about installation type (I tried graphic and text already, it stuck anyway), then after I press enter it shows me "Mount-cache hash table entries: 512" and that's all. I waited severl mins, it doesn't move. I tried to reboot pc several times, it's same. Then I removed 256 and left only 1 slot. and it's fine! I installed centos successfuly. Then I inserted second memory and centos does't load. I see some colored (each time new color) text that changes very fast and then black screen. I connected other HDD with WinXP, it runs fine, it shows me 512 mb, I can lunch Visual studio 2005 fine, etc. But centos just stuck each time if I have memory in both slots.
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Feb 22, 2011
I am trying to run two web servers (Virtual Hosts) on a single Linux Centos 5.5 box with a single IP address 192.168.0.182. I did all the pre-installation requirements such yum install mysql, yum install mysqladmin, service httpd start, service mysqld start etc etc.In /var/www/html directory, I have two folder called server1 and server2. These two folders have the necessary web server php script files and folders. I opened the browser and managed to install the script on one web server successfully. When I put the IP address 192.168.0.182 on the browser address bar, the page loads without any problem. Now I would like to be able to install the other web server script and I don't know how to?Here is my httpd configuration;
<VirtualHost *>
DocumentRoot /var/www/html/server1
ServerName development.mysite.com
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Jan 17, 2011
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What I want: multiple virtual hosts with ssl and only 1 ip address: In my example: server = 192.168.227.129
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Feb 4, 2010
I was having a problem on my squid server whereby 1 website would timeout daily and return a nscd not found error: [url]....There may be other sites but this is the only one I know of. A selection of other sites still work correctly, which is the strange thing.I have found that by restarting the dns cache everything works again: /etc/init.d/nscd restart.I never know quite when this will timeout so it is not very good for people accessing that site on the server.
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May 28, 2010
I have to build a netwrok for small lab and office setup.Setup as belowI have a PC running with Centos 5.4 and has 4 NIC cards. eth0, eth1, eth2 and eth3
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May 30, 2011
I found this IP address in my hosts.allowQuote:ALL: 119.42.68.232I cannot find any other evidence of intrusion.
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Jul 26, 2011
I just changed my CentOS server from DHCP to static IP address. After the change, I cannot ping other hosts on the same subnet. (I can ping the CentOS itself).The IP address of CentOS is 192.168.0.202.After pinging 192.168.0.106 (106 is on and other host can ping it), arp -a shows? (192.168.0.106) at <incomplete> on eth0 It looks ARP cannot resolve MAC address of hosts 192.168.0.106.
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Jul 2, 2010
What is the (officially) proper way to configure Apache so that a given IP address can have two or more virtual host names, each going to different distinct configurations (e.g. with different DocumentRoot, Alias, etc), and also do this for the IP address so that it goes to a designated configuration rather than defaulting to the first or a random host name?
Apache documentation does not appear to address this. If so, it has it hidden in a non-obvious place.
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Jul 21, 2010
1) I'm not sure which IP address to use when I list my machine name in /etc/hosts, particularly after reading:
Quote:
By the w]ay, Arnt Gulbrandsen <agulbra@nvg.unit.no> says that 127.0.0.1 # should NEVER be named with the name of the machine. It causes problems # for some (stupid) programs, irc and reputedly talk. :^)
Here's what I have now:
Code:
root@eagleswing:~# hostname
eagleswing
root@eagleswing:~# cat /etc/HOSTNAME
eagleswing.5binc
[Code]...
I'm not certain how to include my router in /etc/hosts so I can use it to link my PCs as stated above. I was thinking of writing (see above link):
192.168.2.1 localbelkin Will this work & is it proper?
3) Do I need to make use of any other IP addresses at this link? What are the WAN IP & Default Gateway addresses used for? I am going to be serving documents & running scripts on Apache.
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Jun 18, 2010
I installed the Centos 5.5 and after the Xen. After I put a virtual machine named VM01.Initially it worked properly, I tried everything and it worked.When rebooted, I had problems with the network.I have two network cards eth0 and eth1, but eth1 does not have any ip and I use only eth0.The error that appears is:
vif0.0: received packet with own address the source address
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Feb 28, 2010
I just installed kde 4.4 and I noted that a filter I had built before does not work as before. The filter classified incoming mail into a "unknown" folder if the "From" and "To" fields matched "is not in address book". Some messages go to the unknown folder that did not before. Has anybody seen anything related to this? I has a look a kde bugs but could not find this described. The addresses are present in kaddressbook, it seems that kmail does not see them?
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Aug 10, 2010
I have setup Denyhosts to run on my server, and have been using it succesfully for the last few weeks, to allow me to ssh into my server from my home dev machine.
This morning, I accidentally typed my password incorrectly three times - and ended up being locked out of the system (tghat was ok, because that was what was supposed to happen). I logged into the server via another way and took the following actions (in the order given)
/etc/init.d/ssh stop
/etc/init.d/denyhosts stop
removed my IP address from /etc/hosts.deny
/etc/init.d/ssh start
[Code].....
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Jan 2, 2011
Something is definitely odd here:Quote:
[rena@mercury:~ 500]
$ hostname
mercury
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May 24, 2011
The facts are as follows:
1. I have at work a regular LAN with many PCs, each with a DNS-registered public IP. Therefore I am able to address each of these PCs by their fully-qualified names and, for instance, initiate ssh sessions to any of these computers just by typing "ssh <name_of_machine>" from a terminal.
2. Within the aforementioned LAN I have just created a private network with some clients, which access the LAN through a router (a D-link DIR-825). We have created this private network for many reasons, but most importantly because we need to guarantee that the hosts in this network will remain networked among them even if the LAN goes down for any reason (which unfortunately happens often). But we still need to have access to the hosts in the private network from the LAN.
3. I am able to define port forwarding rules in the router in order to access certain services on the private network's clients. For example. I am able to access (by ssh) hosts "H1" and "H2" on the private network from a client on the LAN by defining rules for forwarding ports "P1" and "P2" on the router's public IP to TCP port 22 on the private IPs of "H1" and "H2", respectively. Then I would access each of these hosts from the LAN by using:
>ssh -p P1 [ip.address.of.router] (for accessing H1) and >ssh -p P2 [ip.address.of.router] (for accessing H2)
4. The problem with the port forwarding approach is that it is not easily scalable. For instance, If I wanted to enable ssh access to each host in the private network, I would have to define a port forwarding rule for each machine, and then REMEMBER all these port rules when initiating a ssh session from the LAN in order to point to the right host. And the problem gets worse when considering more services in addition to ssh.
5. The ideal solution would be to be have a means for addressing each host in the private network individually, in much the same way in which I address the hosts in the LAN (which have DNS-registered names). For instance, in order to access hosts H1 and H2 as in the previous example, i would like to be able to just type
>ssh [name_of_host_H1] (for accessing H1) and >ssh [name_of_host_H2] (for accessing H2)
The bottom line:
I guess I can say that what I need is some kind of combined DNS-ing and routing that allows me to communicate with the hosts in the private network from outside of it in a transparent way.
The question is: what are any possible solutions for accomplishing this? I have searched the web and found stuff about things like VPNs, reverse-proxies and NAT servers, but I really can't understand if any of these could serve to solve my problem (BTW, isn't my router doing some sort of NAT-ing already? could I just add some DNS-ing in some way?)
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Apr 3, 2011
I have DDNS configured and working for dynamic addresses, but it's not quite right for static addresses yet. The DHCP server assigns the static address, but it doesn't update the DNS sever with the associated host name. Which means I have to use the IP address when accessing the host instead of the host name. How can I get the DHCP server to update the DNS with the host name associated with the fixed-address?Here is my current dhcpd.conf.
Code:
ddns-update-style interim;
ignore client-updates;
[code]....
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Apr 30, 2010
I can reach other hosts by means of their global addresses by either the IP address or hostname (that has the global address). What I want to (also) do is have a hostname that references the IPv6 link local IP address (an AAAA record in DNS, or just the fe80::<whatever> address in /etc/hosts) and use that host name in commands to access that host. The problem is, an interface ID is needed when making such a reference.
It sure looks like the programs just pass the host name string on to the resolver library, which does not understand the significance of the '%' even though it could find and see that the name preceding the '%' is consistent with that being an IPv6 link local address (e.g. the logic could have been "split at first % and see if preceeding name is found as a link local address and accept that if so, or ignore the split otherwise" ... but it isn't). Is there a different syntax for this ... or was it overlooked in the design of programming around IPv6?I want to be able to address a host by its link local address, while still using a mnemonic instead of having to type the IPv6 address.
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Apr 11, 2011
I am running an application that requires use of my /etc/hosts file. In it, I have my machine name and its LAN ip address. The program creates a service on a specific port, then attempts to connect to it based on the host name. So my hosts file has to be correct.I added the nameservers to resolv.conf and now my application will not run. My guess is that the computer is checking the name servers first, timing out then checking the hosts file.Is there a way I can tell the system to check the hosts file first, then DNS. I thought it should behave that way by default, but it does not appear to.
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Feb 28, 2010
with my other ethernet card problem solved, I suddenly run into this:
Code:
eth1
Link encap:Ethernet HWaddr 00:02:e3:16:37:4c
inet addr:10.0.2.1 Bcast:10.0.2.255 Mask:255.255.255.0
inet6 addr: fe80::202:e3ff:fe16:374c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[Code]...
This card was working perfectly fine up until....an hour ago and it started doing this. My iptables isn't blocking it somehow, because I didn't change anything. I tried reverting to an older kernel and that didn't help. It's not the network cable, it works fine in any other card. Also, the dropped packets seem to count down? It seems to go down by exactly one every time I run ifconfig, no matter the length of time in between running it.
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Oct 22, 2009
after a yum update on my CentOS 5.3 I got this error when shutting down eth0 on reboot...
Shutting down interace eth0: Device eth0 has MAC address XXX instead of configured address XXX ignoring [FAILED]
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Feb 11, 2010
After upgrading centos from 5.3 to 5.4 I have had this error when trying to restart apache:
[root@server1 conf]# apachectl stop
httpd (no pid file) not running
[root@server1 conf]# apachectl start
(98)Address already in use: make_sock: could not bind to address [::]:80
[code]....
I did the following to resolve:
fuser -k -n tcp 80
Then I restarted apache just fine.
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Jun 2, 2010
I'm trying to add several cron jobs. I have a folder (/etc/cron.myapp) with several subfolders in it (30minute, 3minute, daily, hourly). Each of these folders contains a script.Runnng/usr/bin/run-parts /etc/cron.myapp/3minute/will execute the contents of that folder.I have tried adding the following entries to /etc/crontab with no luck, and nothing is showing up in /var/log/cron
*/3 * * * * /usr/bin/run-parts /etc/cron.myapp/3minute/
*/3 * * * * /usr/bin/run-parts /etc/cron.myapp/3minute
*/3 * * * * root /usr/bin/run-parts /etc/cron.myapp/3minute/
[code]....
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May 2, 2011
I'm trying to use ssh-keyscan to get some known_host file population going on, but I have a ton of hosts I want to scan, all with multiple aliases in /etc/hosts. Is there a way to use my current /etc/hosts file to do an ssh-keyscan instead of making a special list of hosts that (from what I've read) ssh-keyscan needs?
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Jan 17, 2011
I have a HP Compaq nx9010 laptop with 1 gig of memory and 128mb being dedicated to video memory. The graphics chip is ATI Radeon IGP 345M.
I can only set my resolution to 1024 X768. If I try to change it to any other size or try to play any games, the video has millions of jerky horizontal lines going through it. If I hookup an external monitor the video works just fine. Being new to linux and even newer to installing on it laptops, can anyone tell me what if any thing can be done to correct this. I am running Ubuntu 10.4 LTS.
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May 2, 2010
I use two ramdisks one mounted in /tmp the other mounted as /ramdisk /tmp is used as a temp store for apps which need temp space /ramdisk is used to store copies of read only databases for processing. Files in here can be 10-500Mb in size.
I suspect that the O/S may be caching the files stored in /tmp and /ramdisk and thus is not efficient. How can I check if the O/S is caching ramdisk files and if this is the case how can I prevent it? Is there an option to say 'dont cache /tmp' ?
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Aug 17, 2011
Well, as many proxy applications, GNOME Network Proxy Preferences only allow to ignore hosts. What I want to do is exactly the opposite. I only want to use the proxy for few sites. Is it possible to define only the allowed hosts in any way?
PS: I know FoxyProxy add-on for Firefox does this, but 1)I don't use Firefox and 2)I want the proxy settings system wide not only for browser.
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Mar 1, 2010
Not sure this is correct place, but I think it's related to network. I'm using CentOS 5. I installed nscd successfully using yum. But I can't start nscd. It shows [ OK ], but stop right away, and I can't found any nscd process.
/var/log/nscd.log is empty, /var/run/nscd/nscd.pid has a PID that doesn't exist, and here's /etc/nscd.conf
Code:
#
# /etc/nscd.conf
#
# An example Name Service Cache config file. This file is needed by nscd.
#
# Legal entries are:
#
#logfile<file>
#debug-level<level>
#threads<initial #threads to use>
#max-threads<maximum #threads to use>
#server-user <user to run server as instead of root>
#server-user is ignored if nscd is started with -S parameters
#stat-user <user who is allowed to request statistics> .....
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Mar 29, 2009
simple installs of CentOS5.2 i386 on 2x Dell C640's and x86-64 on a Dell dimension 9150 resulted in the System/Administration menu offering two entries each with the name 'hardware' and the icon showing a little chip hovering over a PC. I did "add this launcher to panel" on both as an easy way of checking their properties:
The higher entry issues the command 'hwbrowser'
The lower entry issues the command 'hal-device-manager'
Both have the comment "view information on the hardware on this computer". I feel the hal-device-manager entry has the wrong name, comment, and icon. I think /etc/xdg/menus/system-settings.menu is relevant.
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Apr 6, 2010
This is are magic file who kill 20 linux nodes today and.. of course i want to ask - What i can do for limiting size of nscd.log file? i try to find help in man files: nscd and nscd.conf - but nothing about log size. (just paranoia mode with auto restarting.. but this sounds ugly. i need just limit log file size)
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May 5, 2010
I am a non-root user on my Lab computer with RHEL4 OS and am trying to install Glibc-2.11.1 on it .. for proper installation I used a directory other than the source directory of Glibc and ran configure which was fine, then I ran make which also ran fine.. but when I ran "make install" an error came up which was :
make subdir=nscd -C nscd ..=../ subdir_install
make[2]: Entering directory `/data/sandy/Desktop/Gotten/glibc-2.11.1/nscd'
gcc -pie -Wl,-O1 -nostdlib -nostartfiles -o /data/sandy/Desktop/Gotten/glibc-build/nscd/nscd -Wl,-dynamic-linker=/data/sandy/program2/glibc/lib/ld-
[Code].....
so I guess I don't need to specify the configparms .. but anyway I did it as earlier I wasn't sure what would solve my problem with NSCD.. Then I moved to make and all went fine, but the same error popped up during "make install"
install the Glibc package being a non-root user?
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