Server :: Planning On The RHCSA 2nd Attempt?
Jun 18, 2011I'm planning on the RHCSA 2nd attempt? Has anyone taken it twice?
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Server :: LVM Planning - Disadvantage To More Volume Groups?
Apr 28, 2009I've been using LVMs on some of my Linux servers for years without fully "getting" them. Doing a lot of things by rote. As I setup a new RAID though, I realize I don't have to be so rigid. I inherited a mission critical server with five independent disks
Code:
/dev/sdb1 /usr1
/dev/sdc1 /usr2
/dev/sdd1 /usr3
/dev/sde1 /usr4
/dev/sdf1 /usr5
I've bought an external RAID5 box that I plan to migrate the data to and was planning on this layout.
Code:
Method 1
VGLogVol
/dev/sdb1/usr1 -> usr1disk1
/dev/sdc1/usr2 ->usr2disk1
/dev/sdd1/usr3 ->usr3disk1
/dev/sde1/usr4 ->usr4disk1
/dev/sdf1/usr5 ->usr5disk1
Mainly because the 1 to 1 correspondence is easy for me to understand, and what I'm used to. But I realize it doesn't have to be that way, and I could have one VG with all the LVMs as parts of it, i.e.
Code:
Method 2
VGLogVol
/dev/sdb1/usr1 -> arrayusr1
/dev/sdc1/usr2 ->arrayusr2
/dev/sdd1/usr3 ->arrayusr3
/dev/sde1/usr4 ->arrayusr4
/dev/sdf1/usr5 ->arrayusr5
Is there any advantage to one way over the other? Would using one VG with multiple LVs be kind of like "putting all my eggs in one basket"? Do more VGs and LVs introduce unwanted overhead into the LV Mgr that should be frowned upon? If both methods are equal, I go with the method1. Just more clear to me. But now that I understand the second, I could go that way, if there's a compelling reason.
Server :: VNC / Remote Desktop Access Planning
Aug 31, 2009I've just been tasked with making our company's workstations available from remote locations over our internet connection. While it seems simple in concept, I know there will be several issues I'll have to deal with. What I'd like to know is if anyone has recommendations as far as software to use and methods for securing connections. I'd like to have communications encrypted, which last I heard OpenVNC couldn't do (maybe that's not the case?). Also, I'm not really sure how the interactions between windows clients vs. my linux server and the remote connections should be handled. Would I need a separate instance of say, OpenVNC, on each client that I wanted to be allowed remote access?
View 3 Replies View RelatedServer :: Planning To Migrate From RHEL 4 To Higher Version?
Jun 3, 2010we are planning to migrate from RHEL 4 to higher version. Latest RHEL available is RHEL 5.5 and also RHEL 6 BETA is released which will soon available for production.
View 1 Replies View RelatedGeneral :: RHCSA Exam In The RHEL6?
Apr 5, 2011I wanna take the RHCSA exam in RHEL 6. I read exam has 2 parts. And I have some questions about exam.
1. Do they take the exam in one day or 2 days?
2. How many questions come in theoretical part?
3. How many minutes for 1 question?
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General :: Started To Prepare RHCSA Certificate From RedHat?
Apr 18, 2011I started to prepare myself to RHCSA certificate from RedHat. In order to get this cert I have to pass exam EX200.THe best way to prepare would be to take part in courses RH124 and RH135 but I don't have cash for this and that's why I decided to prepare by myself.I downloaded ebook and have some experience in linux administration :McGraw.Hill.RHCE.Red.Hat.Certified.Engineer.Linux.Study.Guide.Exam.RH302.5th.Edition.Jun.2007Do you think that's enough to pass this EX200 exam ?Maybe someone have torrents to RH124 and RH135 courses ?
View 8 Replies View RelatedServer :: Chrooting Attempt Of BIND9 Failed?
Jun 18, 2011I followed blindly this how to : [URl].. out of laziness and then for some reason bind9 didn't want to start. So I tried to apt-get remove it, but when I re-install it, it failed because
Code:
chgrp: cannot access `/etc/bind/named.conf*': No such file or directory
so I assume the chrooting stuff I did is in the way, but I know very little about chrooting and permissions ... how can I undo the following things I did :
Code:
/etc/init.d/bind9 stop
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Fedora Networking :: Hacking Attempt On Server (need To Close Ssh)?
Oct 3, 2009I've just had a log email sent from the server box and it seems Somebody's trying to gain access to the server via ssh
sshd:
Authentication Failures:
root (210.38.xxx.xx): 16 Time(s)
unknown (210.38.xxx.xx): 7 Time(s)
Invalid Users:
Unknown Account: 7 Time(s)
& it seems that it's somebody who's at Zhanjiang Ocean University in china I've got the firewall enabled, but how do u set up rules to stealth the server's IP address to make it invisible & disable ssh so only I can log into the server to fix any problems (eithernet cable) not over the net
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Ubuntu Installation :: 10.04 - Whenever Attempt Upgrade Server Becomes Unbootable And Have To Reimage And Start Again
Apr 18, 2011I have had Ubuntu desktop on my PC for a year now and am very happy with it. A couple of months ago I got a Ubuntu server 10.04 for playing about with. I have installed the gui, for personal reasons, but I want to upgrade to 10.10
Whenever I attempt the upgrade my server becomes unbootable and I have to reimage and start again. I have even tried performing the upgrade before I install the GUI but it still makes no difference.
Although I have the GUI I am doing the upgrade via command line.
Upon watching the upgrade in process, I find that no errors are occurring. Could it be something to do with my server provider?
Server Specs are: Specification: Intel Dual Core, 2.2 GHz 800MHz FSB, 2MB L2 Cache, 2Gb DDR, 1x 250Gb HDD
General :: Filter And Block Failed Attempt To Access Proftp Server?
Jan 7, 2011I want to filter and block failed attempt to access my proftp server. Here are few line from the /var/log/secure file:Quote:
Jan 2 18:38:25 server1 proftpd[17847]: server1.XYZ.com (93.218.93.95[93.218.93.95]) - Maximum login attempts (3) exceeded
Jan 2 18:38:27 server1 proftpd[17864]: server1.XYZ.com (93.218.93.95[93.218.93.95]) -
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Ubuntu :: Paint Into A Corner By Not Planning?
Oct 1, 2010Ubuntu community: I have desktop running 10.04 with a 160 GB HDD (150 ext4, 6.5gd swap) that is slowly becoming a file/print server. I decided to add a 500 gb hard drive and thought I should seek some advice before formatting and partitioning it. The network its on is shared with windows and Ubuntu machines. I do plan on adding more HDD's down the road as they fill up fast. I just didn't want to paint myself into a corner by not planning this out.
View 9 Replies View RelatedOpenSUSE :: Planning To Return To Suse After A Gap Of Two Years?
Apr 5, 2010Planning to return to suse after a gap of two years. Is anyone using xephem and gcompris. Or can some one submit the link for how to install of these programmes.
View 3 Replies View RelatedUbuntu / Apple :: CD Not Planning To Install Power Mac G3?
Jan 22, 2010I installed Ubuntu on my G4 I tried it on my G3. it booted off the Live CD fine but when I launched the installer it would crash. I'm not planing to install it on there but I'm wondering why it did that?
View 3 Replies View RelatedUbuntu :: Planning On Using The Rest As A Data Drive?
Apr 13, 2011I will admit i dont know how partitions work in ubuntu. I installed 10.10 on a fresh disk with just 40gb for the OS. I was planning on using the rest as a data drive.
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If i go places > computer i do see a drive "250GB harddisk: 189gb filesystem"... I assume this is the free space mounted. However, inside that folder is "lost & found" with a x on it and i dont have permissions to write to the folder/space. I'm just looking for some advice on how i can use/access this free space. I have gparted live cd and i've tried several things but 2bh i don't know what i am doing.
General :: Planning On Resurrecting Some Older Computers
Oct 8, 2009I have two older PC's, that I would like to revive, or at least make somewhat useful. I've experimented with Ubuntu and Damn Small Linux so far but I know there are probably better solutions. Computer number 1 is from (estimate) 1996, it's native OS is Win95. It has very modest specs
2GB HDD
16MB RAM
200MHz Pentium processor
CD Drive, (probably not a CD-R or CD-RW...which may explain why DSL wouldn't work.)
Currently it's mostly used to play the occasional game of Doom and word processing, and educating my little brother on how lucky he is to be growing up today. I've been wishing to use Linux on it, but Ubuntu is out of the question, and DSL refused to boot, (probably because I suck at burning discs)I tried running something called GreyCat linux on it, but that was next to useless and I had to input all sorts of commands and insert floppies just to get it to start up. I'm hopeless with CLI, I honestly don't expect much of a response for poor old computer number 1.Computer number 2 is much more optimistic. It's from around 1999-2000, it's native OS is Win98, but I gave it Win2k due to Win98 being insecure and all. Win2k is going to stop getting security updates mid 2010, so I figured I should be prepared. I tried Ubuntu on it, but that was slower than Win2k, so I don't think I could do that to my old friend (the computer), I've successfully put DSL on it, but I'm sure it's more capable than that.
-30GB HDD
-384 MB RAM
-900 or so MHz Pentium 3
-DVD drive and a CD-RW drive
Both computers have 2 USB ports each, computer number 1 doesn't seem to know it though.
Ubuntu Installation :: Hard Drive Space Planning For 10.04 LTS?
Oct 16, 2010When I install and update software on Ubuntu, what is the location of those installation files. I'm going to install Ubuntu 10.04 LTS with 30 GB and wanna update huge collection of software. Is it enough or I need more space?
My plan is :
boot = 130MB
swap = 4096 MB
/ = 26000MB
Should I need separation of root(/). Like: /user, /tmp etc. If, then which media needs more space?? OR what should be the best choice?
Software :: Planning Giant Array Expandable To 80TB
Dec 18, 2010Currently have a Server 2003 fileserver. I am tired of having to buy a whole new hardware array every time I need more online space. I'm up to my 3rd controller/disk swapout in 5 years and I need something truly expandable. This time I am shooting for the stars and devising a system that will have an upper limit of 80TB instead of just doubling or tripling the current space (6TB). The server will initially be equipped with a 4-port eSATA contoller with a single 5-drive tower running through a port multiplier to one of the eSATA ports. As time goes on more towers will be added to fill all the eSATA ports (5 drives per port, 20 drives). If needed a second controller will be added to provide another 20 drives worth of capacity. (40 drives total). I need to work out what the best way to configure these drives is, to have some level of redundancy and also to keep the available data space reasonable. What I've worked out so far is:
LVM - expandable volume, all space should appear as a single volume. Start with an LVM volume over the 5 drive mdadm array. Expand it over new 5-disk towers as they are added.
|
v
MDADM - Each tower of 5 disks will be in a 5-disk RAID5 array set up with mdadm. As new towers are added the md* device will be used as new space to expand onto with LVM
Here's a quick diagram to show what i mean [URL]. So what I haven't been able to find out so far is:
> Is this really a good idea, what other way is there to get truly expandable storage?
> What happens to the linux kernel when it reaches /dev/sdz?
> Is mdadm capable of managing 40 disks, even if they are grouped as different arrays?
> Can LVM create a 57.92TiB volume?
> What FS would I need to use to support a 57.92TiB volume?
> If one md* fails entirely (2 dead drives from a group of 5), would anything on lvm0 be recoverable?
Server :: Vsftpd Not Working: Connection Attempt Failed With "ECONNREFUSED - Connection Refused?
Apr 28, 2010vsftpd 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".
View 7 Replies View RelatedOpenSUSE Install :: Multiple Machine Flash Drive Install Planning?
Jun 18, 2010I have two different laptops that I would like to make bootable flash drive installs for, but would then like to have at least /home on a common removable storage (either a big flash drive or USB or ethernet hard drive) to share between the two laptops (I'll only be using one laptop as a Linux box at a time). One laptop (Dell Latitude D410) is only 32 bit capable (Pentium M - I think there's a 64 bit Core 2 CPU available for the socket 479, but I don't know if the BIOS / mobo will support it). If I'm going back and forth between 32 and 64 bits, can I share /home? What else can I share - /usr or anything else?
View 1 Replies View RelatedDebian :: PHP Hack Attempt Logs?
Apr 13, 2011I have received the following log messages on my Debian Squeeze webserver:Apr 13 15:16:37 vps suhosin[4699]: ALERT - ASCII-NUL chars not allowed within request variables - dropped variable 'controller' (attacker '75.126.235.115', file '/var/www/xxxxxxxxxxxxx.com
75.126.235.115 - - [13/Apr/2011:15:16:37 +0100] "GET /index.php?option=com_product&controller=../../../../../../../../../../../../../../../proc/self/environ%00 HTTP/1.1" 200 8018 "-" "libwww-perl/6.01"
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General :: Why SMBmount Not Attempt Working
Aug 10, 2010I can successfully access one of our local samba shares, which is on a windows pc (called marina) as follows:
$ sudo /usr/bin/smbclient \\marina\resource_library <my password>
Domain=[MARINA] OS=[Windows 5.1] Server=[Windows 2000 LAN Manager]
smb: >
So, that works. I'm now trying to mount the above location (the resource_library folder on marina) to /mnt/resource_library (as a read only folder), but it keeps failing - I've tried a few variations of specifying the location:
$ sudo smbmount \\marina\resource_library /mnt/resource_library -o username=max,password=<my password>,r
mount error: could not resolve address for marina: No address associated with hostname
No ip address specified and hostname not found
and
$ sudo smbmount //marina/resource_library /mnt/resource_library -o username=max,password=<my password>,r
mount error: could not resolve address for marina: No address associated with hostname
No ip address specified and hostname not found
And both of the above with MARINA instead of marina.
Ubuntu Installation :: 3rd Attempt To Upgrade From 10.10 To 11.04
Jun 20, 2011I have tried to upgrade from 10.10 to 11.04 three times and I have had no success. Every time I get the blank purple screen and go through hell to get it back to a usable point. I have been reading and researching about this issue and have had no luck. I have went through the steps of the sticky at the top of the forum and got no where. Can someone please look at my hardware listed below and get me some insight or a different route?
Graphics card: Nvidia GeForce 9500 GS
Here is a link to my exact computer info:[URL]
Ubuntu Installation :: Is There A Ppa Or Should I Attempt To Build .deb Myself?
Jul 6, 2011I'm doing web development on my laptop and I need to use the stable version of Firefox 4. The problem is that my laptop (acer aspire 5000) is running lucid* and there is no stable Fx4 in the repo. I do have the firefox nightly, but I would like to have a stable Fx4 too.Is there a ppa or should I attempt to build a .deb myself? Does anybody know if there is a lot of work to do that, or has anybody here done it themselves?
View 3 Replies View RelatedCentOS 5 :: 5.5 Crashes During Install Attempt
Feb 17, 2011I'm having similar problem to someone else here in the forum (see [URL], but only with the 64 bit version of CentOS 5.5. Almost every time I try to install it, it will crash at some point in the "interactive" startup phase (but it is random). One time, I actually reached the install desktop. I did not attempt an install. I shut the machine down and the system crashed. I haven't been able to get to the install desktop since then.
I have successfully installed CentOS 5.5 32bit, however, on this same machine. In fact, I am writing this from a VM running under CentOS 5.5 32bit on this machine, and do all my work on this machine. I have since upgraded to the latest 2.6.18 kernel with PAE and latest VirtualBox; I have not experienced ANY instability at all with this machine so far. Occasionally, VirtualBox gets an error booting the client, but it has been rare and I've seen this even on older VirtualBox versions on a previous mainboard, so I am not particularly suspicious of that. It is a brand new system, only about a month old. All new parts, except for mostly unused hard drives and drive bays.
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Fedora :: Thunderbird Update Fails On Every Attempt In F12
Nov 4, 2010I'm running F12 and Package Updater has been telling me to update Thunderbird for two days but fails on every attempt. I tried to go the yum route today with
yum remove thunderbird
yum install thunderbird
And I get this error:
Error: Package: thunderbird-3.0.10-1.fc12.i686 (updates)
Requires: nss >= 3.12.8
Installed: nss-3.12.7-6.fc12.i686 (@updates)
nss = 3.12.7-6.fc12
Available: nss-3.12.4-14.fc12.i686 (fedora)
nss = 3.12.4-14.fc12
Is there any way I can update nss such that Thunderbird will have access to the correct version or is this something that is in process for the repository?
Ubuntu Installation :: Can't Boot After Attempt To Upgrade
Jan 17, 2010Can't boot at all. At first, was able to boot using LiveCD USB but now whether I plug it or not, computer freezes at blank screen with blinking cursor at the top left of the screen.
View 1 Replies View RelatedUbuntu Installation :: Failed Attempt At An Upgrade To 10.04?
May 15, 2010I had a failed attempt at an upgrade to 10.04 but I know the error of my ways however before I go through it again does 10.04 still have the tools available for a dial-up connection, wvdial & gnome ppp?
View 4 Replies View RelatedUbuntu :: Getting Grub Error 17 On Reboot Attempt?
Aug 26, 2010Well about a week ago my computer acted a bit funny and upon attempting a reboot I hit grub error 17, and really haven't been able to make it past it. A had my original OS on it and get some files off and backed up at least. Backing up, I've only used a single OS of Hardy Heron. I don't understand why I'm being affected by this error when all I have is two harddrives that are used as unbroken partitions. Best advice I've used is to use a live disk, however the one I've currently got is for Lucid Lynx. I'm not sure whether I need to go and get the old version of a live disc since all I want are my files.
I'm content to update to the newer version (though part of me wants to wait for the next one since it's only a few weeks away.) If I could get my system running as it was that'd be great too. I believe the harddrives are fine since both are recognized in bios, just when running the live disk it asks if it wanted to install it or try it first. When running in the trial of Lucid, I can see the second harddrive and access files as I could on Hardy, but I can't see the main one. I really don't know what to do and am considering just starting over and cursing the loss of the data I want to preserve.
Ubuntu :: Can't Login After Attempt At Openafs Install
Sep 6, 2010I'm running Kubuntu 9.10. In the process of trying to install openafs, I messed w/etc/pam. d/common-auth and /etc/pam.d/common-session. So, now I can't login to my machine. Loging in using the console gives the message module is unknown.I'm unable to log in in recovery-mode: the system freezes at the recovery menu.
View 2 Replies View RelatedUbuntu :: Apt-get Update And Then Attempt To Install The Package?
Dec 16, 2010when I perform an apt-get update and then attempt to install the package cifs.utils it says that it cannot find the package but in Ubuntu 10.04 it does find it in 10.10. Does this package have another name or is it that the standard repositories to not have it in there list?
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