Server :: Lots Of "C" (Closing Connection)?
Mar 14, 2011
My server works fine, is never overloaded, but suddenly the Apache workers start to rise up to the limit (450), and are all internal processes "OPTIONS * HTTP/1.0" with "C" (Closing connection). Then the server runs very slow and this can take several hours until I restart Apache.e.g. today:
Code:
0-0 24789 1/7/7 C 0.10 3980 0 0.0 0.01 0.01 ::1 my.server.com OPTIONS * HTTP/1.0
1-0 24790 1/2/2 C 0.03 3989 0 0.0 0.02 0.02 ::1 my.server.com OPTIONS * HTTP/1.0
[code]....
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Aug 2, 2009
am running centos5.3 on a virtual machine and was trying to do some basic hardening and part of it i had to modify the pam.d/system-auth file and from then i am getting a fatal error whenever i try to connect via ssh using putty i am not at all able to login the server with any of the accounts even root also.I am scared unknowingly did i lock the system???how to resolve this issue?
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Oct 26, 2010
I am currently in the process of moving around 20TB of data from one server to another. Security is not a concern, since the data are freely available to anyone on our network anyway. There are a couple of things that I'm trying to decide on:
(1) protocol choice
Of all the choices I have--nfs, ftp, scp, rsync, samba--has anyone done any benchmarking to show which would be the fastest/most robust transfer protocol? I know nfs has slow write speeds for synchronous transfers. Asynchronous would be faster, but less robust. I'm leaning toward rsync since it performs md5sums to confirm the file transfers. (Remember if there's a 1 in a billion chance that a byte will get corrupted, then I'll have 20,000 corrupt bytes in the transfer.)
(2) Nautilus emblems
We use emblems in Nautilus to categorize files. The old and the new server have the same directory structure.Is there any way to copy the Nautilus emblems from the old server to the new server. What I want is that if a user had marked a particular file with a star on the old server, then that file would be marked with a star on the new server when he/she logs in.
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Feb 2, 2011
I am having weird issues with courier IMAPD, the load goes like crazy at times and users mail client just hangs! The server is having 4 GB RAM Dual Core and around 700 users connected to 143 (via netstat) and I see around same amount of imapd's in process list. Mailbox stays in SAN (fiber).
load is high: 105.52, 173.12, 113.05
iostat.txt
Linux 2.6.9-34.ELsmp 02/02/2011
avg-cpu: %user %nice %sys %iowait %idle
8.93 0.02 1.58 8.06 81.40
[Code]....
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Jul 7, 2010
Does anyone know what could be causing a Remote Desktop connection to a 10.04 box to be closing after some period of time? I have three systems all running 10.04 with Remote Desktop enabled. I'm using UltraVNC on Windows 7 to connect to them. If I open a connection and leave it open for a long time (like overnight, for example), when I come back in the morning, I still see the VNC window but as soon as I click on it, it closes. I can immediately open a new connection to the box but it now shows two active connections. At first I was thinking maybe there's an idle timeout value but given that Ubuntu still seems to think that the original connection is active, maybe the problem isn't on the Ubuntu side but on the UltraVNC side?
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Jan 21, 2011
I have a script which takes a file as input and reads it in while loop cuts the name of table and stores in a variable opens DB connection and queries for rowcount in that table closes the connection reads another file and then follows step 1 through 4 till EOF is reached. Now this script is taking longer to execute maybe because the DB connection is opened and closed each time.
My scripts is:
Code:
#!/bin/ksh
cat logcountOP | while read LINE
TBLName=`echo $LINE|cut -d "-" -f1`
[code].....
I was thinking of changing this.I want to open the DB connection just once and then query it for all tables and then exit.
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Jan 16, 2010
I have an odd problem in that my wireless connection is okay until I close the laptop. When I open it back up, I'm unable to reconnect. This problem first occurred after upgrading to 9.10. I can reconnect after restarting. I tried several things before breaking down and reinstalling 9.04. After installing 9.04, everything works great. Any suggestions on what is going on before I try upgrading to 9.10 again? I have a Dell D600.
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Apr 18, 2011
I've configured postfix on my linux server. For the most part, I got everything working (IMAP, apache, etc) but for some reason, I can't get postfix to work remotely. Postfix works locally to send mail. E.g. when I telnet locally to port 25. However, when I try to telnet from outside, the connection closes almost immediately. I've looked at various configuration options and tuning enhancements but found nothing helpful. Here is my config:
Code:
main.cf:
#See /usr/share/postfix/main.cf.dist for a commented, more complete version
# Debian specific: Specifying a file name will cause the first
# line of that file to be used as the name. The Debian default
[code]....
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Sep 11, 2010
We have a 1000 year old mandrake server at work providing mail services.We need to close port 25. iptables is not installed. is there another way of closing ports on linux ?
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Nov 30, 2010
I have written a server application which has select for both incoming new client connection requests and incoming data from client. I am able to process incoming connection requests and client data.
For example, server has 8 clients connected to it. If client 3 disconnects from server, how will server come to know this client has disconnected and to close its client socket fd gracefully? Does server's select get data on that client socket fd as 'close' data or any error code in recv() function that notifies server to close this client socket fd? Also if client disconnects abruptly without sending close request to server, how should server handle this? Does server get "EPIPE" error?
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Mar 23, 2011
Linux printing appeared to be working fine up until yesterday. Today typing lpq gives the following: lpq Printer 'sdst@other.domain' - cannot open connection - Connection timed out Make sure LPD server is running on the server
The /etc/cups/printers.conf file is properly set, the printers appear in localhost:631 and they are printing test pages. However, all command line print commands seem to be trying to print to sdst@other.domain I don't know why printers.conf is being ignored and why and how sdst@other.domain was added. Seems like it might have been auto-discovered?
# dit: sdst@other.domain was mentioned in /usr/local/etc/lpd.conf I'm not sure why lpd.conf is being used instead of /etc/cups/printers.conf
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May 20, 2010
I'm a frequent user of the shared connection feature of SSH. Usually i have two or three connections open at the same time through the connection sharing feature, but sometimes when i try to start another i get the message "Shared connection to <server< closed". All the connection that are established through the connection sharing feature are still active and not closed, but when i try to create a new one i get that message.. i've even got that message when i have only had two connections through the shared connection feature.
I've tried to search google but it doesnt seem like anyone else has had the same kind of problem, does someone know why i sometimes get this error ?
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Feb 10, 2011
I am running an Ubuntu Server on a VirtualBox VM running on my windows machine. So I've created a self-signed certificate using the following tutorial: [URL]
From this tutorial I'm left with 3 files:
server.key
server.csr
server.crt
Then I found this very similar tutorial that has an extra bit on installing the certificates in apache: [URL] So I followed it's instructions which boil down to this:
[Code]...
So I'm thinking this should work now. However in Chrome I get: SSL connection error Unable to make a secure connection to the server. This may be a problem with the server, or it may be requiring a client authentication certificate that you don't have. Error 107 (net::ERR_SSL_PROTOCOL_ERROR): SSL protocol error. IE8 gives me a typical "Internet Explorer cannot display the webpage" Note that [URL] fails while [URL] works fine, so it's definitely something in my ssl setup I'm thinking.
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Apr 28, 2010
vsftpd not working on my CentOS system. I tried logging in using FileZilla but the error message was: Connection attempt failed with "ECONNREFUSED - Connection refused by server".
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Feb 2, 2010
I can make a connection to the vpn server, the connection starts, but nothing happens! My IP address remains the same as previous! There is nothing added to my Knetworkmanager, I'm a beginner I should use a pcf file for my vpn connection. I use it properly, I'm sure because the connection starts and an icon is added to my panel and remains until I disconnect.
I checked it via ifconfig -a, the last part (which is for vpn) is:
Code:
tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:141.213.169.76 P-t-P:141.213.169.76 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1390 Metric:1
RX packets:4 errors:0 dropped:0 overruns:0 frame:0
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May 20, 2010
Recently while at school, my trackpad stopped working completely. When I log out to my login screen it works, and as well as kde. I use compiz btw in gnome.[SOLVED I THINK] --> My boot splash doesn't show up until its fully loaded and won't show in the correct resolution.Every so often, the UI flips out and won't let me click menus or text fields or use my keyboard at all.
The trackpad is a setting i bet. BUT I looked everywhere for a setting that is making it not work.[SOLVED I THINK] --> The splash is ok, I'm not worried about it, but I wished it looked nicer on my computer D:The UI freak out is annoying and trouble some as it happens randomly in use.
I am on a laptop:
HP Pavilion dv9000
Intel Centrino Core 2 Duo 1.73GHz
NVIDIA GeForce Go 7600
2GB of memory
ps - I am not a fan of HP, Intel, or NVIDIA, this laptop was free so not complaining about not having AMD or ATi or another laptop brand
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Sep 20, 2009
Here is an excerpt from powertop
Top causes for wakeups:
69.2% (563.1) <kernel core> : hrtimer_start_range_ns (tick_sched_timer)
7.7% ( 62.5) <interrupt> : nvidia
4.9% ( 39.6) USB device 4-2 : Microsoft 3-Button Mouse with IntelliEye(TM)
4.9% ( 39.5) <interrupt> : uhci_hcd:usb4
[Code]...
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Jan 17, 2011
I upgraded to 10.10 a few months ago. All was well until a week or so ago, my PC was incredibly slow to respond to anything - mouse clicks, etc. After investigating, I found Evolution using 90% of my RAM - I have 4G. I restarted the PC, started up Evolution and everything was better for a very short while. I then found Evolution using 2Gb+ again later that day. I have noticed that immediately upon startup of Evolution, watching top, evolution uses 900Mb+ Virt and 450+Mb Res. If I open a single email, it jumps to 1300+ Virt, 500+ Res. The more I read a few more emails, the more it jumps.
I have updated everything possible via Synaptic. I only have a handful of accounts - probably 3 POP3 that download to local folders, and about 5 IMAP (GMail) based ones. Nothing excessive IMHO. Now, Evolution is basically useless. All I can do is open it, check email, and close it as soon as possible. I'd rather not switch to another email client - I did that back in 10.04 when I switched off Thunderbird in favor of Evolution because of all the Evolution integration in Ubuntu/Gnome.
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Jul 18, 2010
I recently installed Squeeze. Almost every time I install software I have unresolvable dep errors. In my Software Sources Everything is checked Main, Contrib, Non-Free and source. But in 3rd party the only thing in there is the installation CD. Is this correct or am I missing repos? downside of running testing? If I'm missing them could someone please post what repos I should have...
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Aug 14, 2015
I am trying to set a static IP for my wireless adapter (wlan0). I've been getting the error
Code: Select all[....] Reconfiguring network interfaces.... Error for wireless request "Set Encode
" (8B2A) :
SET failed on device wlan0 ; Invalid argument.
RTNETLINK answers: File exists
Failed to bring up wlan0.
Done.
After using the command
Code: Select allsudo /etc/init.d/networking restart
Here is what etc/network/interfaces looks like
Code: Select allauto lo
Iface lo inet loopback
auto eth0
Allow-hotplug eth0
Iface eth0 inet manual
Auto wlan0
Iface wlan0 inet static
Wireless-essid xxxx
Wireless-key xxxx
Address 192.168.3.116
Netmask 255.255.255.255
Gateway 192.168.3.0
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Apr 22, 2010
I want to install Ubuntu on many different new user's systems from a distance. I am looking for the simplest cleanest way to pull this off. These systems will only boot Ubuntu....no dual boot systems. Plus, I need a way to accommodate different size Hard drives such that the entire hard drive is used. There will be a novice computer user on site who can insert a cd or dvd for me and boot the machine.
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Feb 12, 2010
I have been running happily on Knoppmyth R5F27 (on Debian GNU 4.0/Etch) for a good long time. Everything has been operating well. My kids get to record their Mythbusters. Life is good. Tonight, though, I tried to make things better. And that was the mistake.
I read that we could use our PS3 to watch videos on Hulu. But, I needed a kind of proxy server or something to mask that I was using the PS3 browser. So, I thought I would install squid on the myth box.
I first tried apt-get install squid But, that didn't quite work. So, at a friend's suggestion, I ran: apt-get update Which had problems, too. Still, being a noob, I reran the apt-get install squid and a bunch of stuff came down. It has problems, too.
So, I turned back to apt-get update and realized there was a problem in sources.list. I updated it to have a more current repository and received the update. Then I realized that the apt-get for squid was pulling down resources for lenny. I struggled trying to kill the install for Squid. Failed. And then rebooted just to see if I have problems.
And I do. Mythbackend won't start. The command to do so produces a segmentation fault. Ditto for mythfrontend and mythtv-setup. I don't know what to do. Can someone help me roll this back to a stable setup of Etch? If you want to see my (very messy) attempt to install squid and update the system you can look at[URL]..
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Nov 12, 2010
I did a fresh install of F14, and I am using adobe 64bit flash plugin,on "some" websites such as yahoo movie trailers, flash videos are played with an audio which comes with lots of annoying noise. the video itself is played smoothly without any problem but the sound is terrible to my astonishment, this problem shows up only on a number of web sites, and on others such as ..... the sound is clear.
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Jan 13, 2010
When executing different programs varying from the Ubuntu Software Manager to pstotxt and lots of other programs I get tons of errors that have to do with Python2.6, whatever it is. I think it got corrupted since my netbook turned of while installing some (Dutch) language packs.The smaller problem, is that the language packs failed to install properly, and I can see some Dutch sentences between the English ones sometimes...The major prolem, is that somehow a lot of programs won't work anymore, mainly terminal programs. pstotxt is one of any examples. Installing software doesn't always work because of these errors.
This is the output when I want to use pstotxt to convert a .pdf to .txt file:
Code:
Traceback (most recent call last):
File "/usr/lib/command-not-found", line 8, in <module>
import CommandNotFound
File "/usr/lib/python2.6/dist-packages/CommandNotFound/__init__.py", line 1, in <module>
from CommandNotFound import CommandNotFound
code....
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Jan 17, 2010
I try to do anything in wine, including winecfg, I get a lot of errors, and the program runs really slowly. Here are the errors
Code:
fixme:heap:HeapSetInformation (nil) 1 (nil) 0
fixme:win:RegisterDeviceNotificationA (hwnd=0x147f30, filter=0x84e9e4,flags=0x00000001),
returns a fake device notification handle!
fixme:advapi:RegisterTraceGuidsW (0x100778a, 0x100a060, {485e7de8-0a80-11d8-ad15-505054503030}, 1, 0x33fe28, code....
I get this error for every program, so I do not think it is an error with the program. If fixing this will change anything like making it faster any help would be appreciated. Oh, I also can only run a few programs. I can't run things like WMP or itunes, and I think this may be the cause.
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Feb 15, 2010
i have a question about the best choice for a filesystem: We have in our company a productive webserver running debian with nginx webserver to serve images. The number is about 15 million, they are around 2kb or 3kb of size each and they are stored under some subdir in /home with a hashed subdirectory tree which is 2 leves deep. the images are copied with nfs from some other machine time to time. We get high load when this copying is running. Currently we are using ext3, and considering moving to jfs, cause its relativly low load impact, but i am still courios about the performance. I think serving lots of images is often practiced thing, so i would be interested what others are using as filesystem in this scenario, or if someone could make a recommendation for our case.
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Feb 23, 2010
I got the following errors after trying to install Drupal6 from the repositories.
[Code]...
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Jan 24, 2011
The only window that's open is the terminal running this command, no pidgin, skype, samba, torrent or anything I can think of is using the network yet there is ***** load of output from tcpdump. I was hoping to use this to check where certain applications connect to and what messages they send but when I'm doing nothing there is already more output than I can go through. Running tcpdump for less than 10 seconds gives me the following output:
Code:
16:13:22.015683 IP ns.hihkptt.net.cn.domain > desk.local.56598: 46887 1/2/2 (166)
16:13:22.016251 IP ns.hihkptt.net.cn.domain > desk.local.60099: 21168 1/2/2 (166)
16:13:22.016743 IP ns.hihkptt.net.cn.domain > desk.local.42325: 50346 1/2/2 (166)
16:13:22.034733 IP ns.hihkptt.net.cn.domain > desk.local.41441: 63658 1/2/0 (134)
16:13:22.035215 IP ns.hihkptt.net.cn.domain > desk.local.42865: 37537 1/2/0 (134)
16:13:22.036124 IP ns.hihkptt.net.cn.domain > desk.local.35006: 7520 1/2/0 (134)
16:13:22.036569 IP ns.hihkptt.net.cn.domain > desk.local.38480: 51322 1/2/0 (134)
16:13:22.066006 ARP, Reply 192.168.0.1 is-at 00:b0:0c:02:60:9c (oui Unknown), length 46 .....
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Jan 26, 2011
I use nautilus and its awful. The only good thing are the tabs and the bookmarks on the cons:
* it freezes now and then when moving lots of files.
* Slow to navigate while large amounts of data are moving or displaying.
* Slow presenting of files where there are a lot of them (it should only render whatever is in screen and maybe render a properly sized navigation bar. Anything else shouldnt freeze the client. Render at its once pace if at all. I dont move the scroll bar it shouldnt freeze
* It doesnt queue (meaning it moves everything at the same time instead of queueing stuff, what makes moving stuff take longer) .
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Jan 25, 2010
Take a peek at this:
Code:
Jan 23 20:15:01 localhost CRON[22629]: pam_unix(cron:session): session opened for user root by (uid=0)
Jan 23 20:15:01 localhost CRON[22629]: pam_unix(cron:session): session closed for user root
[code]....
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