CentOS 5 Is Same As RedHat 5
Apr 29, 2009CentOS 5 is same as RedHat 5, is it?
I have heard that CentOS is same as RHEL excepting logo and name changes
If I want to learn CentOS, can I buy RHEL 5 book?
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Redhat 5 Or CentOS On My New Dedicated Box?
Dec 20, 2008I'm getting a new server with ThePlanet and moving away from a reseller account.
My choices are Redhat 5 or CentOS.
HAproxy - Quick And Dirty HTTP Load Balancing Tutorial On Redhat/Centos
Aug 14, 2007This can be adapted to other operating systems, for the scope of this tutorial it will be designed for Redhat enterprise / Centos ....
View 0 Replies View RelatedHOW TO : CentOS 3/RedHat 9 ---> CentOS 4.5, Step By Step.
May 18, 2007I've made a how to, based on my personal knowledge about upgrading a CentOS 3, RedHat 9, or 8?, Fedora Core, and maybe others, to the new CentOS 4.5 OS. (or CentOS 4.x)
[url]
Please post, comments, questions, etc. here.
I've myself upgraded many servers this way, (even, tonight, I upgraded another, so I finally decided to do this with all my notes)
Installing Mono RedHat
Sep 17, 2007on installing Mono but havnt found any. Tried their installer and it doesnt work at all.
Does anyone know of a tutorial out there that will help or can anyone provide me with step by step instructions for installing it to REDHAT Enterprise 4 i686
I am using WHM but read a lot of horror stories about installing it via WHM unless thats fixed. If it was fixed, how could i do this instead of a manual install?
RedHat Hosting Program
Mar 28, 2008Does anyone know how to sign up for the RedHat hosting program where you have to pay monthly for the licenses as opposed to yearly?
I called their support number but that guy asked me to sign up online for the Yearly license. But I know a lot of dedicated server companies have a monthly commitment.
Can anyone recommend their sales rep to me who knows exactly what I'm talking about? You can PM me their details if you want.
Update Tool On Redhat
Oct 31, 2008What is the equivalent to yum in the latest Redhat releases? I just got a VPS but it doesn't come with yum.
View 6 Replies View RelatedRedHat's Global File System
Apr 25, 2009Is anyone here running GFS? The responsibility of managing a small cluster of them is about to fall into my lap, and the only documentation I can find is on Wikipedia, which is troubling. I've got the man pages, but I was hoping for more of a document outlining how it works.
Why would lock_dlm2 or gfs_scand take up close to 100% CPU with minimal traffic on the machine, for example? What do those do? How can I tune it to not do that?
I'm not so much looking for specific answers here about tuning, but am more curious about where I should be looking for documentation. I find it hard to believe that there is none?
Hitting Connections Per Second Limit Of RedHat EL
Jun 11, 2009I have a powerful 8 core 8gb ram web server with scsi raid drives running RedHat EL 4. This server handles 2,000 - 3,000 HTTP requests per second via Litespeed httpd without strain (over 60%+ CPU idle time during peak load, under 1% IO wait). As the traffic volume continues to increase I've encountered a strange problem, the symptoms of which are as follows:
- About 1/4 or 1/3 of new connections are not answered by the server - they time out.
- All connections that are answered have exactly 3 seconds added to the time it takes to establish connection with the server (can be seen as "Connecting to ..." phase in FireFox). HTTP response times were tested by Pingdom from multiple locations all over the world.
- The problem is either "on" or "off", it is not gradual.
- Server ping is unaffected during the problem - no delay and no packet drops.
- The problem does not happen during off-peak hours of the day.
If litespeed httpd settings are tweaked to keep as many connections as possible in keepalive state for as long as possible, the problem is avoided, while tens of thousands of connections are kept in keepalive state.
Possible causes that were tested and eliminated: PHP/MySQL load (problem applies to static files exactly the same), CPU / IO / RAM, network uplink, hardware firewall, DNS.
This makes me think that there is some kind of bottleneck of how many NEW connections per second the server can accept. By maxing out keepalive quantity and duration I'm reducing the number of new connections per second. This is a temporary fix that will only work up to a certain point.
After investigation, litespeed staff verified that my litespeed configuration was correct and after some testing said that nothing in litespeed was responsible for this limiting factor. Litespeed process uses relatively little CPU and can definitely handle more volume.
Following sysctl.conf values were increased substantially to see if that will make a difference: tcp_max_syn_backlog, tcp_max_tw_buckets, tcp_max_orphans, netdev_max_backlog, somaxconn, file-max. This didn't produce any results. Disabling syncookies didn't help either. dmesg doesn't have any notices of limits being hit or throttles being applied.
Litespeed staff suggests that likely some limit in linux kernel is being reached. The strange 3 second delay does seem like an "intelligent" DDOS protection strategy of some sort. Perhaps this is some kind of kernel level DDOS protection?
Exim Wont Work, Redhat ES4
Mar 6, 2007I have complied exim 4.66 version using the source, now i do not seem to make it work
i am getting the fallowing error when i try send mail
$ exim xxx@xxxx.xxx
test
2007-03-06 12:36:44 1HOeWd-0000SH-EZ Cannot open main log file "/var/log/exim/mainlog": Permission denied: euid=8 egid=12
2007-03-06 12:36:44 1HOeWd-0000SH-EZ Failed to create spool file /var/spool/exim/input//1HOeWd-0000SH-EZ-D: Permission denied
2007-03-06 12:36:44 1HOeWd-0000SH-EZ Cannot open main log file "/var/log/exim/mainlog": Permission denied: euid=8 egid=12
exim: could not open panic log - aborting: see message(s) above
when i do $ service exim restart the service fail to stop and but starts OK.
there is no control panel installed on the box.
Qmail On Redhat Setup For Mail Relay?
Dec 10, 2008Qmail on Redhat setup for mail relay? (I'm a newbie)
I'm trying to figure out how to enable mail relaying for a specific domain on a Redhat server running Qmail. Can anyone tell me where to look? I searched Google, but am now very confused.
Hypertown RedHat RHEL 5.2 Server Has Been Going Down Everyday
Jul 13, 2008For the past two weeks, our Hypertown RedHat RHEL 5.2 server has been going down everyday because of a wierd Kernel Panic problem.
Attached you can see what was displayed on the console at the time of the panic. This is what SoftLayer tech. support team was able to obtain from the console.
We are not using Samba or NFS-based applications.
Here is the server's info:
[kaware3@rannatweb ~]$ uname -a
Linux rannatweb.com 2.6.18-92.1.6.el5PAE #1 SMP Fri Jun 20 02:51:01 EDT 2008 i686 i686 i386 GNU/Linux
[kaware3@rannatweb ~]$ free
total used free shared buffers cached
Mem: 16632176 3244660 13387516 0 234480 1934632
-/+ buffers/cache: 1075548 15556628
Swap: 2096472 0 2096472
[kaware3@rannatweb ~]$ more /etc/fstab
LABEL=/1 / ext3 defaults 1 1
LABEL=/var1 /var ext3 defaults 1 2
LABEL=/boot1 /boot ext3 defaults 1 2
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
LABEL=SWAP-sda3 swap swap pri=0,defaults 0 0
/dev/sdb1 /disk1 ext3 defaults 0 0
/dev/sdc1 /disk2 ext3 defaults 0 0
/dev/sdd1 /disk3 ext3 defaults 0 0
[kaware3@rannatweb ~]$ iostat
Linux 2.6.18-92.1.6.el5PAE (rannatweb.com) 07/13/2008
avg-cpu: %user %nice %system %iowait %steal %idle
3.78 0.00 4.41 9.02 0.00 82.79
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
sda 90.93 1784.24 1401.45 2073549 1628690
sdb 156.49 1567.09 179.30 1821188 208368
sdc 47.39 443.82 565.21 515787 656864
sdd 0.06 0.88 0.01 1019 8
Redhat Cluster Suite Case Studies / Tutorial
Sep 18, 2007I would like to know f.e the setup scenarios f.e for one,two or x fence devices.
The below docs just dont contain enough meat to get you going.
[url]
[url]
[url]
If you are aware of any good hands on tutorials or docs than please feel free to let me know.
I dont mind if the documentation has no screenshoots but the technical explanations must be sound in order to understand how to configure RHCS.
Apache :: Multiple Servers On Single Linux Box Redhat
Nov 5, 2014I need to configure multiple Apache Web Servers on redhat server. I have copied and extracted Apache 2.2 into redhat server and extracted but not able to install because I don't understand setting prefix. Please let me explain about prefix configuration and how to set it. At the same time I would like to know is it possible to setup 4 Apache Web Servers on same machine if possible then how to. Can we set up different versions of Apache HTTP Servers?
View 17 Replies View RelatedStreaming :: Windows Server 2008 Hosting Or Redhat Linux Hosting?
Mar 5, 2009I'm hosting wmv,wma,mp3 files, streaming of video can be done with Windows hosting, but my website script is with php.
Do you suggest Windows Server 2008 hosting or redhat linux hosting?
Difference Between CentOs 5.0 And Centos 4.5? Both With Plesk
Oct 1, 2007What is the difference between CentOs 5.0 and Centos 4.5? (Both contains Plesk)
Would CentOS 5 contain more updates and fixes? CentOS 4.5 be more stable?
Upgrading From Centos 4.6 To Centos 5.2
Aug 19, 2008Does it worth to upgrade cent os to latest version on server where is installed whm/cpanel?Could i request upgrade from cpanel support ?
View 3 Replies View RelatedCentOS 4 32-bit Or CentOS 4 X86_64 Bit
Aug 7, 2007which one do i have to choose?? and why?
my server is P4 3.6GHz HTT with 2GB RAM
Getting GUI On New CentOS VPS
Oct 17, 2009linux and after several days testing different distributions and a bunch of different ways (e.g. freenx,vnc XFCE ...) I've decided to setup a vnc-server on CentOS-5-i386-minimal and use KDE as a desktop environment.
After reloading my vps with centos-5-i386-minimal, I logged in as root and executed:
Code:
yum update
yum -y groupinstall "KDE (K Desktop Environment)"
yum -y install vnc vnc-server firefox X11 xorg
I then added a user "abt" and set the password. Then I logged in as abt and execute : vncserver, it asked for the password and created the appropriate .vnc directory and files.
I then edited xstartup file and replaced "twm &" with "startkde &" and executed vncserver once again, this created desktop number 2 for me.
The problem is that after running TightVNC(on vista) and entering IPNUMBER:2, It successfully connects to vnc-server but what i get is a black screen with X cursor!
Centos HDD
Jul 21, 2009i have a colo server, lately im having problem, every 2-3 oclock in the morning my server crash, i asked the server management to have a look at it but no luck, they install rpm, reduce the http max, etc, etc ( i dont want to mention the name since my server management have helped me alot and its not fair for them if i speak a bad thing about them ) anyway,
I bought the server from siliconmechanics iServ R254
CPU: 2 x Intel Xeon E5410 Quad-Core 2.33GHz, 12MB Cache, 1333MHz FSB, 45nmHi-k
RAM: 12GB (6 x 2GB) DDR2-667 Registered ECC - Interleaved
NIC: Intel 82573V & 82573L Gigabit Ethernet Controllers - Integrated
Hot-Swap Drive - 1: 150GB Western Digital Raptor (1.5Gb/s,10Krpm,16MB Cache,NCQ) SATA
Hot-Swap Drive - 2: 500GB Seagate Barracuda ES.2 (3Gb/s, 7.2Krpm, 32MB Cache, NCQ) SATA
Optical Drive: Low-Profile DVD-ROM Drive
Power Supply: 520W Power Supply with PFC - 87% Maximum Efficiency
Rail Kit: 2-Piece Ball-Bearing Rail Kit
OS: CentOS 5 - 64-bit - Preload, No Media
Warranty: Standard 3 Year - Return to Depot - Advanced Component Exchange
Configured Power: 255 W, 262 VA, 871 BTU/h, 2.4 Amps (110V), 1.3 Amps (208V)
Im using CENTOS 5.2 x86_64
i check on the message log, this is the error before crash
hdc: status timeout: status=0xd0 { Busy }
ide: failed opcode was: unknown
hdc: no DRQ after issuing MULTWRITE_EXT
ide1: reset: success
hdc: status timeout: status=0xd0 { Busy }
ide: failed opcode was: unknown
hdc: no DRQ after issuing MULTWRITE_EXT
ide1: reset: success
hdc: status timeout: status=0xd0 { Busy }
ide: failed opcode was: unknown
hdc: no DRQ after issuing MULTWRITE_EXT
ide1: reset: success
Motherboard manual
[url]
i read on centos forum its a problem with the drive - the 500 gigs( the server read my hd as ATA instead of ATA )
i tried to go to BIOS and change to AHCI but server doest recognize the drive
[url]
APC On CentOS
Jun 6, 2008Is there really no package in yum for APC (Alternative PHP Cache)? Everything I'm seeing suggests I build it from source.
Is this the way to go? I can, it just seems unlikely to me that there's no build of it.
CentOS 4 GUI
May 19, 2008is there any GUI ( pre installed ) in centOS 4 ..
if yes, how can we access it,
if no, how can we install GUI and access it...
CentOS 5 Vs CentOS 5.1 Vs CentOS 4.6
Mar 8, 2008Will be reloading server OS and wondering with which one of those should I go?
Now using 4.6
Centos 4 Or Centos 5?
Oct 31, 2008I have dedicated works on Centos 4. Now I have to reinstall OS. Administrators recommend me to put again Centos 4 and I would like to install Centos 5. Would like to hear opinion of professionals what it is better to put?
View 12 Replies View RelatedCentOS 4 / WHM
Jul 26, 2007how to find OS crash logs or apache crash logs. My server keeps dying every night and I need to know where and how to find out why it is doing this.
View 1 Replies View RelatedYum [centos 4.5]
Feb 23, 2008I've just leased my first dedicated server from managemybox, which has come loaded with centos 4.5.
I need to install all the ffmpeg/transcoding junk - something I've done before...
...but now, I'm having huge issues. Yum and up2date don't seem to have *any* idea of where anything, from ffmpeg to flvtool2 is.
I'm crap at quite a bit (read most) of the command line stuff. Whadddoo I need to do? Why is yum telling me there are no matches for the damn stuff?
How can I get from A to B properly without the hassle?
I did have a VPS before, with memset.com - and all this stuff installed fine on Fedora 4 (it was a VMWare based VPS so everything worked, unlike the Xen based ones I've experienced).
Yum On CentOS 5
Nov 20, 2007How to install yum in CentOS 5?
View 5 Replies View RelatedCentOs 5.0
Oct 5, 2007I have core2quad box with 4GB RAM, when i try install CentOS 5.0 on it then it show 3GB RAM only, and CPU just show:
Quote:
Processor #1 Vendor: GenuineIntel
Processor #1 Name: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz Processor #1 speed: 1596.000 MHz Processor #1 cache size: 4096 KB
Vnc On CentOS 5
Dec 1, 2007Since the last 6 days ive been trying but dunno how to fix it.
Thing is i want to install vnc on my server.
Therefore i googled some tuts and managed to get things done after some days.
Steps i took.
yum -y groupinstall gnome
yum -y install vnc vnc-server firefox x11-xorg
vncserver
--------------------------------------------------------------
--------------------ERRORS I AM GETTING-----------------------
--------------------------------------------------------------
-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
xauth: creating new authority file /root/.Xauthority
sh: cannot redirect standard input from /dev/null: No such file or directory
New 'server.xnwo.net:1 (root)' desktop is server.xnwo.net:1
Creating default startup script /root/.vnc/xstartup
Starting applications specified in /root/.vnc/xstartup
Log file is /root/.vnc/server.xnwo.net:1.log
sh: cannot redirect standard input from /dev/null: No such file or directory
[root@server ~]#
-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
and when i connect using vnc viewer, i get this grey background and a box on the top left. has it been installed correctly? any other steps needed?
Here is the screenshot of the background i see when connecting.
[url]
CentOS 64 Bit Or 32 Bit
Feb 2, 2007I would like to get a second opinion on this. I was going to put CentOS 64 bit on my server but I have been told to put the 32 bit version on it instead because it is a more stable version. I have never heard this before and am new to doing colo and would like to verify this before I end up doing something I may forget?
View 14 Replies View RelatedCentos 5
Mar 8, 2007I have been using Centos for several years but have not been a user long enough to see what happens when the new version comes out.
I expect Centos 4 will be around a while however how quickly are hosting companies planning to adopt Centos 5?
