Server :: Big Bug System In Centos Server

Jun 3, 2011

There is my problem ,after a wrong manipulation after uninstall syslog in centos 5.6 server i removed 83 packages:YUM,RPM,vim,ls..............so i can't even try to install a new package because i miss yum and rpm.

When I use rpm command it says an error like below:

rpm: error while loading shared libraries: libssl.so.6: cannot open shared object file: No such file or directory

When i use wget to download yum:

Code:

When i use ls:

Code:

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CentOS 5 Server :: NFS Performance With Files Not Yet Cached By The Server File System?

Feb 25, 2009

I have a weird performance issue with a centos 5 running a nfs server and a rh8 client. I think the fact that it is rh8 client should be downplayed. It is just that with rh8 client the performance degradation seems more clear. See test details below OS in server is Centos 5 x86_64 kernel 2.6.18-92.1.22.el5

1Gb connection between machines File to test over NFS is a 1GB file. First of all I wanted to measure how the network alone performs while using NFS. So in the server side I run a "cat" command on the 1GB file to /dev/null. Please note that the disk read speed is about 98MBs. At this point the file system has the 1GB file cached in memory. In the client side a "cat" on the same file gives me a speed of about 113MBs. It seems then that the bottleneck in this instance is the network and it is very close to nominal speed. So the network performance is really good. (BTW I know that the server got that file from cache because a vmstat or iostat shows no disk activity.)

The second test is reading from disk with no caching involve. In the server I flushed the 1GB file from the memory. For instance by reading another 5GB file and I repeat the same thing as above in the client (a cat on the 1GB file). Now, the server has to go to disk.(vmstat or iostat shows the disk activity). However the performance, now, is about 20MBs, I was expecting something closer so 90MBs. (since the reading speed in the server in the first test showed 98MBs).

This second test was repeated for ext2, ext3, xfs with no significant differences. A similar test using a RH8 NFS server and client gets me close to 60MBs for a 1GB file not cache by the file system in the serverSince network speeds and disk read speeds are not the bottlenecks ... what or where is the limiting factor then?

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CentOS 5 Server :: Transfer Complete System + Webcontent To Other Server?

Aug 10, 2010

I run a webserver with centos 5 and like to change hardware. I run a 1u supermicro 6014t server with 4 *500gb raid 6 and like to downgrade to a smaler but more efficient server. The problem is this. I'dd like to transfer all the content and the whole OS to the new system, but how do I do that

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CentOS 5 :: CentOS 5.5x64 X-server And ATI FireGL 3300 System Crash?

Mar 30, 2011

I have some trouble with my hp workstation xw4400 with an ATI FireGL 3300 and the X-Server. There was no problem with the graphical install routine and the graphical boot works fine. But when the system changes into the login-screen, then it results in a black screen and a more or less frozen system.

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Debian Configuration :: Install A Multi-core System And Configure It To Run Several VMs, One Each For A Firewall, A Caching Proxy Server, A Mail Server, A Web Server?

Jan 25, 2011

I will be relocating to a permanent residence sometime in the next year or two. I've recently begun thinking about the best way to implement a home-based network. It occurred to me that the most elegant solution might be the use of VM technology to eliminate as much hardware and wiring as possible.My thinking is this: Install a multi-core system and configure it to run several VMs, one each for a firewall, a caching proxy server, a mail server, a web server. Additionally, I would like to run 2-4 VMs as remote (RDP)workstations, using diskless workstations to boot the VMs over powerline ethernet.The latest powerline technology (available later this year) will allow multiple devices on a residential circuit operating at near gigabit speed, just like legacy wired networks.

In theory, the above would allow me to consolidate everything but the disklessworkstations on a single server and eliminate all wired (and wireless) connections except the broadband connection to the Internet and the cabling to the nearest power outlets. It appears technically possible, but I'm not sure about the various virtual connections among VMs. In theory, each VM should be able to communicate with the other as if it was on the same network via the server data bus, but what about setting up firewall zones? Any internal I/O bandwidth bottlenecks? Any other potential "gotchas", caveats, issues? (Other than the obvious requirement of having enough CPU and RAM).Any thoughts or observations welcome, especially if they are from real world experience in a VM environment. BTW--in case you're wondering why I'm posting here, it's because I run Debian on all my workstations/servers (running VirtualBox as a VM for Windows XP on one workstation).

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Server :: Unable To Setup A NIS Server Setup On CentOS System

Jan 19, 2010

We are trying to set up a NIS server on a CentOS system. We need to have a NIS server which can provide NIS authentication to a couple of clients. We are practically new to all this stuff.

Just googled to find some ideas about installing ypserv and ypbind and portmapper. We did all that and also started them successfully. But now the clients are not able to join to the NIS domain . The error log states "YP_DOMAIN NOT BOUND".

I guess we have not entered the /etc/yp.conf, /etc/hosts files properly. Please let us know the detailed steps to setup a NIS server .

Also, please let us know what entries should go into the different /etc/<file_names>? What is meant by HOSTNAME in the /etc/hosts file?

Is there any other files which need to be changed? Are we missing any steps?

Also to add-on, while executing the ypinit command we faced the following error:

At this point, we have to construct a list of the hosts which will run NIS servers. localhost.localdomain is in the list of NIS server hosts. Please cont inue to add the names for the other hosts, one per line. When you are done with the list, type a <control D>. next host to add: localhost.localdomain next host to add:

The current list of NIS servers looks like this:

Is this correct? [y/n: y] y

Error running Makefile.

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CentOS 5 Server :: Automation Of Ftp Server \ Configure A FTP Server Where Upload And Download Files?

Jan 8, 2011

i have been trying to complete the following project1) Configure a FTP server where we can upload and download files.........2) server must run at 9 pm & stop at 9 am automatically ............although the first task was easy ,i have no idea how to accomplish the 2nd task(not to mention I'm a new user)

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Server :: Setup RAID 1 On CentOS 5 Server For A Zimbra Email Server

Feb 7, 2011

I'm trying to setup RAID 1 on a CentOS 5 server for a zimbra email server.I get a partion schema error. Can I do this?The server is a HP Proliant ML150 G3 server with two 80GB HDD.

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CentOS 5 Server :: Yum Command Not Working On System / What To Do?

Jul 8, 2009

Yum command is not working on my system today!
when i write any commands using yum, such as yum check-update or
yum install some package it shows the following code...

shall add something to my repository?

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CentOS 5 Server :: Configuring Fonts In Non X-Window System?

Feb 10, 2009

Am using Icefaces1.7.2 in tomcat5.5.23 in Centos5( jdk 1.6.06 and jre 6u11 and no X window system in my server ).. Am getting the error(java.lang.Error: Probable fatal error: No fonts found) when am using the functions getFontMetrics() and drawString() methods in my Captcha Image Generation programs. I am only using the fonts that me retrieved using ge.getAllFonts() ( i.e., the fonts available in the system ).

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CentOS 5 Server :: Possible To Create RAID SW On Working System

Oct 5, 2009

I'm working in a little company and 2 weeks ago one of our server had a hard disk failure (yes it was a seagate 11) and after passed two days without sleep trying to recover everything (and we did it!!) we took the decision now to use in some of our server a raid sw, so if one HD fail we can continue with our system without losing nothing. Yes I know normally you have to take all the precautions before so this things never happen, but you know I thing if it never arrives you, you always think than you're lucky and it's never going to happen to you but one day you discover reality.

So now this server is working with a Centos and the default HD partitions one boot partition and the LVM. I'm reading everything I'm finding about raid sw and lvm but I don't find if it's possible to create now with the system working a raid sw without having to reinstall all the system. Is it possible to do it ? If not what are my options to make a system backup before reinstalling everything?

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CentOS 5 Server :: Way To Allow Two Servers To Use Same File System On SAN Using ISCSI?

Mar 9, 2010

What is the correct way to allow two servers to use the same file system on a SAN using iSCSI?Is it GFS on the two servers?

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CentOS 5 Server :: Configure Global File System?

May 17, 2010

I need to enable GFS for a shared storage file system, I need to share it to different ip's so that every one get syn data on that file system

ex : /data on 192.168.0.10

I need /data to be in GFS and need to share to 192.168.0.20 & 192.168.0.21

so that this two machines can have sync file system

/data is in shared storage

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CentOS 5 Server :: Update 5.3 - "Warning - Your System Is Actually Running CentOS Linux Version 5.3."

Jul 31, 2009

I have Centos 5.3 on our server When I log-in in webmin I have a message "Warning - Your system is actually running CentOS Linux version 5.3." In the next line I have a button "Update Detected Operating System" My question is Do I need to click the link and update Detected operating system? If I do, is it going to change any configuration on our server?

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Server :: Dell R310 System - Scientific More Stable Than CentOS

May 25, 2011

I am setting up a Dell R310 server system with a raid controller. Has anyone installed either of these OS on this server. Is Scientific Linux more stable than centOS these days.

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Server :: Dynamically Grow The Ext3 File System In CentOs?

Nov 3, 2010

I have configured a "Syslog" server on /var directory as a separate ext3 partition - to receive the logs and events from the clients & the firewall as well. The directory needs to grow dynamically as the logs are populated. Is there a way i can make the filesystem grow dynamically as and when the directory is full.

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CentOS 5 Server :: Kswapd0 Using 100 Percent CPU - Drives Up System Load

Oct 20, 2010

Our CentOS 5.5 server has an intermittent problem where kswapd0 begins using 100% CPU, driving the system load to 20-30 and higher, and eventually crashes the server. The problem seems to be triggered by an intensive Java process (Lucene indexing), but only once every month or two. Lucene reindexing normally runs every 15 minutes without a problem. When the problem happens, there is still plenty of free RAM (as measured by /usr/bin/free's "buffers/cache" value, which is 1.5GB) and free swap space. The server is running MediaWiki 1.15 with the standard CentOS Apache, PHP, MySQL. My intuition is that this is a kernel/swapper bug.

Kernel info:
$ uname -a
Linux myhost 2.6.18-194.11.1.el5 #1 SMP Tue Aug 10 19:05:06 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux

Memory info:
Normal memory usage:
$ free
total used free shared buffers cached
Mem: 3090688 2769932 320756 0 258416 1531780
-/+ buffers/cache: 979736 2110952
Swap: 2097144 8212 2088932

Memory usage 30 seconds before a crash:
$ free
total used free shared buffers cached
Mem: 3090688 3050764 39924 0 113772 1309972
-/+ buffers/cache: 1627020 1463668
Swap: 2097144 179480 1917664

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CentOS 5 Server :: Compiling Error Mod_ruby-1.3.0 On Centos 5.3 Server (with Howtoforg)?

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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CentOS 5 Server :: Join Windows Server 2003 To CentOS 5 Cluster?

Jul 26, 2010

is it possible to join Windows Server 2003 to CentOS 5 Cluster?

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CentOS 5 Server :: Reboot The Server With Centos 5.5 The SMB Deamon Doesn't Start?

Feb 22, 2011

when I reboot the server with centos 5.5 the SMB deamon doesn't start?

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CentOS 5 Server :: Unattended Reboot With An Encrypted Root File System?

Mar 31, 2009

Centos 5.3 includes Ext4 and improved support for encrypted file systems but it appears to be aimed at laptop/desktop systems, in that a password must be entered at boot time.

Is it possible to have a server with an encrypted root file system boot up without entering a password?

Mandos will do it...
http://wiki.fukt.bsnet.se/wiki/Mandos
...by serving up the password from another server...
http://packages.debian.org/squeeze/mandos
...to a client loaded into the initial RAM disk environment...
http://packages.debian.org/squeeze/mandos-client
...but it's not available on CentOS, and is only in Debian unstable.

Is there a similar (or any) solution for CentOS?

In particular, I'm envisaging encrypted virtual machines being served passwords from their virtual host.

Alternatively, the data that *really* needs to be protected could be encrypted while the system core remains unencrypted. But then the keys to decrypt the file system must be stored in the unencrypted portion, so this is not an effective method.

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CentOS 5 Server :: Gnome System Menu Causes Crash For Either X11vnc Or Freenx?

Jul 28, 2009

Sorry if this is in the wrong group but its a bit of an odd one but I think comes under Server Support.. I've set up both x11vnc and freenx in an attempt to eliminate either as a cause for this issue. The problem is that when I log in with either, I can get into the desktop and run things from the menus but when I make the System menu active - the session hangs and you have to killall for the freenx or vnc processes.

I was wondering if anyone might be able to help me investigate this and hopefully fix it as I'm not sure where to look given that both types of remote connection seem to have the same issue.

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CentOS 5 Server :: How To Enlarge Space Of Disk Without Re-install Operative System

Dec 5, 2009

I have a server with centos 5, with two hd, i did a fresh installation with cenTOS using the 2 hard disk, now we need enlarge with other hard disk more, can some one explain how to enlarge the space of disk without re-install the operative system?.

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CentOS 5 :: Send An Email To A Local Mail Server For System Monitoring

Dec 27, 2009

I have a CentOS 5.4 nas box that I want to monitor.

I believe I can setup mdadm to mail me when there are issues by addin the following line to /etc/mdadm.cong Quote:MAILADDR root

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CentOS 5 Server :: FreeRadius Simple Shadow / Passwd UNIX System Authentication

Nov 7, 2010

Its 2 weeks i'm trying to configure freeradius2 on centos5 64bit after installed it from yum.all seems working, but i cant authenticate unix users.after digging in many sites its simply cant find user name and password ( ++[unix] returns notfound )Also how can i paste here all the radiusd -X log lines? i can't find any
radius.log file.

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CentOS 5 Server :: Difference Betwen Centos Desktop And Server?

Feb 17, 2009

and what is the diffrent. i now about the server only use command and desktop use both so. am trying to host some sites which one will you recomend.

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CentOS 5 :: Get The System Booted To A Bare Minimum Required To Install Chef (Server Management Software)?

Aug 20, 2010

I am in the process of creating a kickstart configuration file for some RedHat 5.5 and Centos 5.5 servers (Production and test respectively).I have googled about a bit but I cannot find a good list of the bare minimum packages required for a command-line system.If anyone knows how I can trim this list down anymore it would be much appreciated. The aim of this kickstart.cfg is to get the system booted to a bare minimum required to install Chef (Server management software). Chef will then setup Apache, Ruby on rails environment etc.

All this server will need to do is, from a static IP, Host a Ruby on rails app, send emails, send data to a server on the web, accept ssh and occasionally and connect to a SMB/CIFS share This list was taken from the anaconda-ks.cfg file after a RedHat install of what I thought was a pretty minimal system onto a VM but I noticed that cups, the avahi daemonsand gam_server are installed and running which I do not believe are needed for a pure web server.I know that these types of questions are hard to answer without a complete knowledge of the operating environment and what "minimum" is in this case ("@core only? but I wanted yum damnit!")

@admin-tools
@base
@core

[code]....

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Server :: Configure RedHat As A Time Of Day Server For A Docsis Modem System

May 13, 2011

I have been able to find enough information that I need to enable 'time-udp' in /etc/xinetd.d/ But there isn't an entry for time-udp. How do I enable time-udp (Time of Day server) on a Red Hat system? It's RHEL 5.6 64bit.

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Server :: Build A Redundant, High-availability File Server System?

Mar 23, 2010

I am kinda stuck while providing solution for the above problem. I have achieved the fail over using keepalived but not sure how can we replicate the data from one server to other seamlessly and have them in sync with each other. My prime requirement for this project is end user should not notice the fail over and replicated copy of data should be available on the secondary as well.

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Server :: IOPS On Multiple Server Single Mount Point System?

May 28, 2010

In my production setup, i have 3 servers using the same mount point. However, i see that the IOPS is low. Does this kind of architecture have any impact on IOPS. In case it is neutral, how can i tune my setup for better IOPS.

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