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.
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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?
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.
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.
RedHat'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.
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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?
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View 0 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?
DNS Tool
Jan 29, 2007What DNS tool do you sugest ? Bind/PowerDNS/Etc ?
And where can I find newbie information about DNS set up?
Free -m Tool
Aug 23, 2007I am trying to use free -m tool to check memory usage and I am having issues with understanding.
>free -m
total used free shared buffers cached
Mem: 1003 987 15 0 147 505
-/+ buffers/cache: 334 668
Swap: 2000 4 1995
How come cached value is 505 since used value is 987, does cached is included in used 987?
What Is The Best Tool Against Spam
Jan 8, 2007What is the best tool against spam for a linux server using cpanel?
View 8 Replies View RelatedServer Reporting Tool
Oct 19, 2009I am maintaining a dedicated server ( which have apache,mysql,ftp,dns servers) for my organization , i want to produce a weekly report on server like,
1)Avg Server load for current week
2)Avg Memory usage for current week
3)No.of time apache,mysql,dns was killed in current week
As above i want produce a report ,How can take such kind of report from server? Is there is any tool for report generation?
Tool To Check Permissions
Apr 8, 2009Is there any tool available which can be used to check permissions of the folders and files. For example, if we run the tool on the server it gives the list of files or folders which have write/modify permissions for everyone or other anonymous users in Windows.
View 0 Replies View RelatedASP Code Debugging Tool
May 6, 2009I have a customer who is hosting a website on a dedicated server. The server is a high spec server with Intel Core 2 DUO E8400 processor, 4 GB DDR2 ECC RAM and a SATA Hard Drive. He is running only a single website which has a data entry section. The problem is that a few scripts when run consume 99% of the CPU. In fact, there is a particular script which even if run alone consumes 99% CPU. The code retrieves some records from the database by running an SQL query. The code is never executed. I have checked the sql query in the code and it runs fine if executed in SQL Query Analyzer. I know the problem is somewhere in the code, but cannot find the exact cause. Is there a tool to debug the asp code and find out may be the issue with the code? I have tried the Debug Diagnostics utility,
View 2 Replies View RelatedPerformance / Reporting Tool
May 29, 2009I have several servers and I need a tool to measure CPU/disk/memory performance.
I no nothing about hardware (and I also don't want/need to know).
The tools is to compare only - I don't care about the measure unit, I just need a way to compare the performance between my servers like which one as a faster CPU and so on...
Anyone knows such a FREEWARE (and not bloatware) tool?
If the tool has some kind of hardware report... well.. even better.
Bandwidth Monitoring Tool
Jul 7, 2009as far as i know cacti is the only script that can provide logs of the bandwidth consuming per month. I need to know how much bandwidth my server consumeto avoid overage fees.
But cacti got php function that is reuired to be enabledand its pontentional dangerou to renable some php functions, so i prefer script that is more cgi or any safer script
What Tool Can I Use To Do Hardware Testing
Feb 28, 2008I recently build a server. I was wondering what tool can i use to test the stability of the hardware and the OS. (Windows2003/CentOS)
View 4 Replies View RelatedAlertra.com Speed Tool
Sep 16, 2008[url]
shows time in which a file of a certain size is sent from a chosen webhosting server to several other servers in US, Germany, UK, Hongkong, Shanghai and AU.
I want a professional opinion: Can I, from Alertra results, make a conclusion about how fast will my site hosted on a chosen server open for my US, Germany...
Traffic Generator Tool
Mar 12, 2007I'm testing modsecurity2.1.0 and I want to find out if there is a tool that I can use to test different rules i will be using. Like a tool that can generatean SQL injection or some kind of DDoS attack so I can fully test the rules.
View 3 Replies View RelatedWeb Site Monitoring Tool
Jul 31, 2007software that monitoring an web site such as: I add an url and every 5 minutes he access the site if http server is down he send email notifications.
View 4 Replies View RelatedWhich Server Admin Tool
May 30, 2008Which free server admin tool do you prefer? As far as I can tell Webmin and DirectAdmin are the major players (correct me if I am wrong). I am the only one with access, so their is no need for other accounts or hosting sites from others.
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