CentOS 5 Hardware :: Not All The RAM Is Reported Or Available To The Server?
Nov 2, 2010
I inherited a centos 5.2 server at my work. I didn't know anything about it when I got it except that the fate of the organization rested on my ability to manage it. I've gotten along fine with it. I don't really like it, but it mostly works. I learned a lot in the process. Anyway, I went bought some more ram for the box because, hey, it's a server and it will serve faster with more RAM. So it had 3x512mb and I took out one of the 512mb and put in 2x1gb (it's only got four slots). I rebooted and and top reports 1585152k of ram. It should be 3gb. So I haul out a monitor and keyboard because I want to see if the BIOS sees more. Sure enough, on boot I arrive at a grub/centos boot screen and it says somewhere that I have 3gb, I boot and top still reports 1585152k.
How do I make this computer realize it has more RAM?
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Feb 2, 2011
I am having a strange problem on my private nameservers registered with godaddy. There are around 10 domains right now which are using my nameservers ns1 & ns2. After the setup of my nameservers, domains. I checked that the domains are resolving good to the mentioned IP addresses which I mentioned in the zone files but when I am checking the domains on it is showing "Missing nameservers reported by parent" error. I don't know why it is reporting me this error.For example I checked one of my domains spurstone.com & I got the above mentioned error. Although whois database is giving correct results with nameservers NS1.INDEPENDENTADVISORONLINE.COM & NS2.INDEPENDENTADVISORONLINE.COM
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Mar 22, 2011
I want to find the mib files where the OIDs used in snmpd are. Where can I find those mib files?
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Apr 19, 2011
I set up an exim4 server successfully and was able to send/receive mail! I fired off a couple emails to my friend and never got a response. Oh well, I thought, must be because my domain name might be considered spam.Flash forward to today and I get an email from the people who host my server, telling me that I have left my exim4 relay open. Looking through some of my users' email, I see a series of messages with the subject 'Message frozen':
Code:
Message 1QCCQJ-0004FP-OY has been frozen (delivery error message).
The sender is <>.
[code]....
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Feb 24, 2010
There is a centralized FTP server which are accessed by clients to develop some web development project and to achieve this the clients are using ftp service. The problem is when they are trying to copy any files and directories they are getting the following error: "Message reported from the file system: FTP copy not supported,use move instead"
I've checked all the permissions and they are all OK. I don't know why this is happening. they can create and move files and folders but can't copy files and folders.
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Dec 20, 2010
I have noticed this now for the 125 time that when you mount a volume and use mount to see if it is ro or rw, it says rw, but actually is read only.
Why is mount reporting it wrong?
systema3:/vol/mysql_vo2 on /mnt/mysql2 type nfs (rw,addr=192.168.10.82)
vs
failed to change ownership of `/mnt/mysql2/.snapshot/hourly.5/v240-2-bin.058' to mysql:mysql
chown: changing ownership of `/mnt/mysql2/.snapshot/hourly.5': Read-only file system
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May 26, 2011
I installed Fedora 15 twice last night because I thought I had screwed up the installation somehow when I ran a df -h and found that it reported all my LVM partitions twice (/, /home, and /var) and it also showed /var/tmp mounted on the same logical volume that /var was mounted on (lv02 = /var AND lv02=/var/tmp). I've never seen this before and it definitely didn't appear like this in Fedora 14. Is this something new to Fedora 15?
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Jul 12, 2011
I was struggling to find the information so I thought it would be easier to ask here. What does the load average as reported by top mean ? To me those are 3 mysterious values, which most likely refer to some average CPU usage and this is all I know about it (not sure if it's true).What is the maximum value for this parameter (I guess the minimum is 0.00) and what does it mean ?
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May 25, 2011
Today, someone who had problems with his usb flash drive showed it to me. I plugged it in my linux box.
Code:
cat /proc/partitions
only showed
Code:
sdb
and no partition name (sdb1, etc.). So I ran fdisk on it I deleted all the partitions (4 in all) and recreated a single partition taking up the whole drive and marked it as c (win32 vfat) I exited fdisk (w) and formatted the new partition
[Code]...
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Oct 24, 2009
incoming connections are not being reported to my /var/log/secure. I can't see if people are trying to connect. I can't troubleshoot because I can't do anything.
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Dec 11, 2009
I've ran "powertop" on my computer and it showed horrible amount of wake-ups per second:
Code:
Cn Avg residency P-states (frequencies)
C0 (cpu running) (26.7%) 2.81 Ghz 100.0%
polling 0.0ms ( 0.0%) 1400 Mhz 0.0%
C1 16.2ms (60.5%) 1050 Mhz 0.0%
C2 0.0ms (12.8%) 700 Mhz 0.0%
350 Mhz 0.0%
Wakeups-from-idle per second : 63944.8 interval: 5.0s
no ACPI power usage estimate available
Top causes for wakeups:
45.1% ( 15.6) <interrupt> : pata_atiixp
26.0% ( 9.0) <kernel core> : hrtimer_start_range_ns (tick_sched_timer)
9.2% ( 3.2) <kernel core> : hrtimer_start (tick_sched_timer)
5.8% ( 2.0) <kernel core> : add_timer_on (clocksource_watchdog)
1.7% ( 0.6) <interrupt> : ohci_hcd:usb4, radeon, yenta
1.7% ( 0.6) Xorg : queue_delayed_work (delayed_work_timer_fn)
Suggestion: increase the VM dirty writeback time from 5.00 to 15 seconds with:
Echo 1500 > /proc/sys/vm/dirty_writeback_centisecs
This wakes the disk up less frequently for background VM activity
Q - Quit R - Refresh W - Increase Writeback time
If I wait it decreases to 50000, but it is still huge!
Situation is duplicated after complete F12 re-install. All defaults are used and no changes performed after install. Just checked again and let computer run idle for a while. Powertop reports 79604 wake-up per second, even more than before. Again, the top cause is "pata_atiixp". Also, performing suggestions of powertop shown at the bottom of the program does not help either. That decreases wake-up by a few hundreds only. Wake-ups are still well over 50000.
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Jul 23, 2010
I'm doing an distro upgrade from 11.2 to 11.3 and for the DVD drive, the repo URL comes up as dvd:/// in ast and zypper. However medium not read is being reported, forcing me to find out exactly what "dvd:///" is pointing to.
My DVD drive is certainly readable and mountable and sits at /dev/dvd (symlink for /dev/sr0). I usually mount it manually, but the problem here is I don't know how to find out what "dvd:///" represents.
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Jan 28, 2010
When I setup Intrepid (upgraded to Jaunty now), I chose to create a swap partition. I don't remember the size I specified. Here's what I'm confused about When I do 'cat /proc/meminfo' or 'free' or use the system monitor, it reports my swap size as 1262304 KB (i.e. 1.2GB). But if I do a 'fdisk -l', the partition size is reported as 746991 blocks (of 1024 bytes) and if I use the partition editor it says it's 729.48MB. XP disk mgmt shows it as app. 700MB too
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Sep 8, 2010
Currently I am running Ubuntu on my laptop however my desktop is still XP pro. I want to move from XP to a Linux (Ubuntu) or Unix distro (BSD). My desktop is used as my ftp server, music/network storage, and for syncing my iPod with iTunes. The only thing that is keeping me from totally reinstalling the OS on that computer is iTunes. I know there are tons of applications out there that will sync your music to your iPod however I want to still be able to use itunesu and some other features in iTunes. My plan is to run a *nix os but have xp running in virtual box for iTunes. Has anyone else done this and if you have is it a huge pain? Is there a better way to go about what I'm trying to do? I have tried to get the newer iTunes installers to work with wine but I haven't gotten it to work yet. I get errors and the errors are reported bugs on winehq.
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Apr 7, 2011
My MP3 Player (Zen:Vision:M) has roughly 60 GB of space and yet Ubuntu insists only 3.6 GB is available. I know this is not true because in Windows the correct amount of room is displayed and can be filled up. Because my music collection is stored in my Linux partition I need to solve this issue if I'm going to actually use my MP3 Player. What is also interesting is the fact that the device doesn't show up in Gparted, System Monitor or fdisk.
When I attempt to look at the Zen's contents through Nautilus I get this message:
Error initializing camera: -1: Unspecified error
And when I update through Banshee every song gives an error of:
Argument cannot be null. Parameter name: obj
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Oct 14, 2010
I have two HP Quard core high end server.
OS : Red Hat Enterprise Linux Server release 5.2 (Tikanga)
Kernel : kernel-2.6.18-92.el5
From last couple of days I found entry in dmesg:
Should require KERNEL upgradation.?
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Jul 12, 2010
I am running CPU tests on a radio controller to determine max simultanious calls. A tool using top was developed so that we could get a good look at what exactly was happening on the process level, however we are mainly interested in one object running on the box.The box has a single core Celeron processsor running the Wind River Linux platform. The CPU usage from my object is frequently spiking over 100%. Doing some research online so far has led me to the fact that a multicore processor can do this however I have found no mention of a single core processor displaying this behavior.
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Jan 20, 2011
I'm running 13.1 on a Dell Latitude D630 with 4GB of RAM. My problem is that Slackware doesn't seem to see all of the available memory. Here are the #s being reported (just including pertinent #s rather than all output)...
Code:
free -m
total: 3546
[code]...
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Oct 19, 2010
On my dell inspiron laptop if I use a live cd to boot into Ubuntu and then reboot into Windows the computer freezes up within 5 minutes. I uninstalled everything that I had put onto my computer since I purchased it (less than a week ago) in desperate measures because I was ready to take it back and play stupid to get a replacement. Once I went on an uninstalling frenzy my problem was fixed, but I had to know if it was from a program I installed or the live cd I used so I tried it again and sure enough, within 5 minutes my computer was unresponsive. I was using usb flash drives for my live cd and this was on a different flash drive than the first. Just thought it should be known, and I'm not doing it again once I fix my less than a week old computer from this again.
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Nov 29, 2009
After installing 64 bit 11.2 with no apparent problems: computer hangs up on desktop boot opensuse 11.2-2.6.31.5-0.1, however I can boot from failsafe opensuse 11.2-2.6.31.5-0.1. I had problems trying to install Ubuntu so I checked out the opensuse. I do not know if this is an easy fix! I decided to avoid buying anymore windows system software. I ran memory test with no problems. The firmware test reported 4 errors. I have windows XP installed on other hard drive - no problems there.
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Mar 12, 2010
I need to install a package. For that I need root access. However the system says that I am not in sudoers file. When trying to edit one, it complains alike! How I am supposed to add myself to the sudoers file if I don't have the right to edit one? I have installed this system and only administrator. What can I do?
Edit: I have tried visudo already. It requires me to be in sudoers in the first place.
amarzaya@linux-debian-gnu:/$ sudo /usr/sbin/visudo
We trust you have received the usual lecture from the local System Administrator. It usually boils down to these three things:
#1) Respect the privacy of others.
#2) Think before you type.
#3) With great power comes great responsibility.
[sudo] password for amarzaya:
amarzaya is not in the sudoers file. This incident will be reported.
amarzaya@linux-debian-gnu:/$
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Jul 4, 2010
I have got four webservers and one fileserver, all running Karmic and kernel 2.6.31-14-generic #48-Ubuntu SMP Fri Oct 16 14:05:01 UTC 2009 x86_64 GNU/Linux.A folder on the fileserver has been exported using NFSv3 with these options: rw,async,no_subtree_check
and mounted on all four webservers with these options: efaults,rsize=32768,wsize=32768,noatimeThe webservers run Apache+PHP+APC. Some php-files include other php-files from the nfs mount, and are requested by users very frequently (~ 100 times per second). Sometimes but not always if I alter an included php-file using FTP (the FTP server is ProFTPD and runs on the fileserver), the file seems missing:user@webserver1: ~ $ ls --full-time -al /path/to/included/file.phpls: cannot access /path/to/included/file.php: No such file or directoryI can repeat this command for hours, but the file keeps missing. Until I query the directory:user@webserver1: ~ $ ls --full-time -al /path/to/included/ | grep file-rwxr-xr-x 1 1002 1002 14294 2010-07-04 21:11:30.000000000 +0200 file.php
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Jun 10, 2011
does ubuntu installs on windows 7 without effecting it? i tried installing wubi but it reported permission denied.
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Mar 15, 2011
I have set logwatch to report daily the logs, somehow since last week i get below message. A total of 1 possible successful probes were detected (the following URLs contain strings that match one or more of a listing of strings that indicate a possible exploit):
/cgi-bin/blocked.cgi?clientaddr=192.168.1.108&clientname=&clientident=&clientgroup=limitedaccess&targetclass= untrusted&url=http://adfarm.mediaplex.com/ad/fm/9608-84171-8772-2?
[code]...
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Nov 18, 2010
I tried to load a simple driver program. I am using RHEL5. When I tried to compile my 'driver.c' program it shows the following error:
[root@jameslee ~]# gcc -c device.c
device.c:1:25: error: linux/module.h: No such file or directory
device.c: In function 'init_module':
device.c:6: error: 'KERN_INFO' undeclared (first use in this function)
device.c:6: error: (Each undeclared identifier is reported only once
device.c:6: error: for each function it appears in.)
device.c:6: error: expected ')' before string constant
device.c: In function 'cleanup_module':
device.c:12: error: 'KERN_INFO' undeclared (first use in this function)
device.c:12: error: expected ')' before string constant
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Jun 1, 2009
I have a problem with compiling of mod_ruby-1.3.0 After a succesfull configure i get a error in the make, it say "make: *** [apachelib.o] error 1" . Here below you can find the results of de configuring and the make.I was following the roles in Howtoforge " The perfect server - Centos 5.3" everything goes perfect till mod_ruby-1.3.0
./configure.rb --with-apr-includes=/usr/include/apr-1
checking for a BSD compatible install... /usr/bin/install -c
checking whether we are using gcc... yes
[code]....
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Jul 26, 2010
is it possible to join Windows Server 2003 to CentOS 5 Cluster?
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Feb 22, 2011
when I reboot the server with centos 5.5 the SMB deamon doesn't start?
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Aug 4, 2015
I just bought an lenovo thinkpad 440 few days ago. I did all that was shared at [URL] ....
I get the following on the CLI :-
Code: Select all[ 1527.961367] [drm:intel_set_fpu_fifo_underrun_reporting [i915]] *ERROR* uncleared fifo underrun on pipe A
[ 1527.963448] [drm:ironlake_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
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Jan 11, 2010
I removed an ntfs partition I had in my HD and then resized my home partition with gparted to occupy all the available space. The resulting partition is supposed to be 129GB, and gparted/partition magic see that size. But the system does not, and all tools report the old partition size and the same free space I had before resizing.
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