CentOS 5 Server :: Nfs Mount In Different Network
Jan 14, 2010
I have two CentOS 5.4. One is real/host and the other one in VMware-Server.
IP of host is 192.168.200.0/24 and IP of guest is 192.168.210.0/24
I can use ftp,samba,http .. between them but can't mount nfs in the guest and vice-versa since, they are in different network. showmount -e , shows the nfs shared list
This message given while trying to mount
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Apr 29, 2010
I've tried to get an opensuse box I have to share a directory via NFS. I've failed each time, but I thought that the third time, I'd enlist some help from the forums, if I could. how do I know that the nfs server and not the client is the problem? Short answer is: I don't! That's why nfs (and many netwrk problems) are laborious, you're troubleshooting needs to take place at both source and desitination. Next question, what do I have set up so far? Well, I did download the nfs server kernel stuff (two months back) and /etc/init.d/nfsserver start seems to get set up OK. No errors and the daemons nfsd, idmapd, mountd area all running. So, I *think* that part is OK. I have the share set up properly in /etc/exportfs and have "exportfs -r" it.
OK, now onto the trickier stuff: the client and iptables. On the client pinging to the nfserver box is perfect, and I have rpcbind running. the reported error is "mount.nfs: mount system call failed" though from experience nfs errors don't mean a whole lot.However, I will go off and check now and see if I need a mountd running on client-side too.Then there's iptables .... ouch, that could be a long and painful trek. I don't see any specific ports being blocked, and it's the iptables that the default v11.2 opensuse came with. I did turn them off and the problem was the same, so whether wishfl thinking or not, I'm hoping it's not an iptables issue.
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Sep 7, 2011
Summary of issue: EXT4 filesystem won't mount--with error = mount: unknown filesystem type 'ext4'. Is no ext4 in kernel the issue? Or is something corrupted?Really perplexed by this. I updated Centos 5.5 to 5.6 to get ext4 (5.6 is supposed to have full support of ext4). I built several arrays and put the ext4 filesystem on them. All went well until I tried to mount them. BTW, this array (below) is set up as a RAID6 using partition 1 of #8 2TB drives.Bear with me here; just trying to be complete and not waste your time.
Attempting to mount give this:[root]# mount -v /dev/md1 /asc/array1mount: unknown filesystem type 'ext4'Note: it does "fake" mount with ption (which apparently does everything except the system call):[root]# mount -f -v /dev/md1/dev/md1 on /asc/array1 type ext4 (rw,grpquota,usrquote)e2fsprogs:Package e2fsprogs-1.39-23.el5_5.1.x86_64 already installed and latest version (for Centos 5.6; CentOS 6x uses the 1.41...)
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Jun 17, 2011
I want to setup a Linux File Server for a small windows network (around 50 users). I do know that I am gona need Smb service/pkg for that. I haven't used Samba for a while now and as per the best of my knowledge, entire communication (including usernames and passwords) between a samba server & windows client machines will be plain text. Is there any way to secure all this communication??
Secondly, if i remember correctly, MS windows wont let me mount more than one samba shares as network disk when all my shares can be accessed by different smb users with different passwords?? is there a solution to this problem? OR may be if there is any other package available for this purpose so that i wont have to use samba?
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Dec 27, 2010
I had a centos Linux 64bit installed on my server. Unfortunately I don't know how but my OS crashed and now I have no way to get back my DATA except for rescue disk. I have a Linux 64bit loaded in my server with rescue but I have tried many ways to mount my hdd in Linux and was not succeed.
[Code]...
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Jan 2, 2010
I have a Thecus NAS with nfs support running. Now I switched from OpenSUSE 10 to 11.2 on the client side and aren't able to mount my nfs shares. With SuSe 10.0 I didn't have any problems.
The /etc/exports:
/raid/home_nas1 192.168.0.24/31(rw,no_root_squash,sync,anonuid=99,anongid=99,no_subtree_check)
/raid/soundandmore 192.168.0.24/31(rw,no_root_squash,sync,anonuid=99,anongid=99,no_subtree_check)
On the client side I'm able to see the shares:
showmount -e nas1
Export list for nas1:
/raid/home_nas1 192.168.0.24/31
/raid/soundandmore 192.168.0.24/31
The client address:
inet addr:192.168.0.27
I'm using nfs-3:
mount -t nfs nas1:/raid/soundandmore/mnt
mount.nfs: access denied by server while mounting nas1:/raid/soundandmore
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Apr 5, 2011
i have a suse 11.3 machine and i cannot set it to be a NFS server that is i cannot mount a directory of this machine on another one running as well a 11.3 while i can mount without problem a directory from 10.0.i do not know where to start as the NFS server option seems to have vanished from YAST.
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Jan 25, 2010
I have two NFS mounted dirs that the users want specific permissions set upon creation of dirs/files, independent from any other machine on the network.
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Jun 24, 2009
I dont know if this is possible or not but here what I would like to do. I have 6 linux server and each has 100GB disk space. All of these 6 box are compute nodes and space are not used really. However, If I can combine 6 servershard disk that will in total 6*100GB gives you quite a bigger space. Is there any tool or ways to mount these drive in one volume instead of mounting individually ?
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Aug 16, 2011
We are running our website on a VPS Centos 5.6 box, and I am trying to set it up as an NFS client to a remote NAS server box. The script (remote_mount) I'm using (copied inline below) works fine when I run it on another Linux server box running Slackware, but when I run the same script on the Centos box I get the following error message. code...
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Jan 25, 2011
I am using CentOS 5.5 OS. I already install ntfs-3g rpm, but I don't know the command to mount network NTFS drive. I also want to mount it on my fstab file, so whenever it reloads, it can automatically mount on the specific folder.
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Feb 16, 2011
I'm having a consistent problem with instances on Amazon EC2, which a lot of searching including here has resulted in no solution.During boot I see the following message on the console (or "System Log" in the Amazon console):Code:Mounting local filesystems: mount: /dev/sdg already mounted or /apps busy(I'll append a extract from the full log below).Once I log into the instance, I can access the filesystem so it's mounted somehow but I can't figure out what's going on:
Code:
# df -k /apps
Filesystem 1K-blocks Used Available Use% Mounted on
[code]....
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Jul 16, 2009
I'm having a problem accessing files via nfs where an iso has been mounted through the loop device on the nfs server. Basically what I am attempting to do is access the 6 CentOS 5.2 ISO's via NFS from one of my client machines. The client is able to mount the share and see its sub directories leading up to the mount point of the ISO, but the contents of the mounted ISO image are simply not visible (on the client, they are visible on the server).
Server config (CentOS 5):
/etc/fstab:
/home/user/iso/CentOS-5.2-x86_64-bin-1of7.iso /exportiso/centos/x64/5.2/disc1 iso9660 defaults,loop 0 0
[code].....
NFS is working correctly for other mounts between these two boxes, however.
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Sep 3, 2011
I need to create an extended partition with no mount point.Enclosed is my custom ks.cfg
install
cdrom
text
[code]....
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Sep 22, 2011
We have a Centos 5.6 server mounting two iSCSI volumes from an HP P2000 storage array. Multipathd is also running, and this has been working well for the few months we have been using it. The two volumes presented to the server were created in LVM, and worked without problem.We had a requirement to reboot the server, and now the iSCSI volumes will no longer mount. From what I can tell, the iSCSI connection is working ok, as I can see the correct sessions, and if I run 'fdisk -l' I can see the iSCSI block devices, but the O/S isn't seeing the filesystems. Any LVM command does not show the volumes at all, and 'vgchange -a y' only lists the local boot volume, not the iSCSI volumes. My concern is that, the output of 'fdisk -l' says 'Disk /dev/xxx doesn't contain a valid partition table' for all the iSCSI devices. Research shows that performing the vgchange -a y command should automatically mount any VG's that aren't showing, but it doesn't work.
There's a lot of data on these iSCSI volumes, and I'm no LVM expert. I've read that some have had problems where LVM starts before iSCSI and things get a bit messed up, but I don't know if this is the case here (I can't tell), but if there's a way of switching this round that might help, I'm prepared to give it a go.There was absolutely no indication there were any problems with these volumes, so corruption is highly unlikely.
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Oct 1, 2010
i have successfully done the setup of postfix and dovecot on this link [URL]I run Cent OS on top of window 7 via VM Player,i want to access mailbox from windows 7 using email client like Thunderbird and Outlook. What setting i need to do in my mail server ?
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Jan 22, 2011
I would like my Ubuntu server to show up as a drive on my XP home machine. I have loaded samba on to the server but I can only get it to show as the printer and faxes under my work group. Also is there a way to have my Ubuntu laptop to auto mount the server when I am on my home network?
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Feb 18, 2009
I am trying to mount a samba share using an fstab entry
//srv1/Corporate /winfiles cifs user,uid=0,rw,noauto,suid,credentials=/root/wnmount_credentials.txt 0 0
The mount appears to complete cleanly, however when I browse the directory /winfiles it is always empty.The smbclient command works properly using the same credentials.The /root/credentials file looks something like this
username=********
password=********
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Aug 27, 2010
I installed NFS and portmap for export a folder to another PC. /usr/local. ftp is server's hostname and ws01 is client's hostname. I edited file /etc/exports with next text: /usr/local ws01(rw,root_squash) *(ro)
I restarted service portmap and nfs. From client, I try check connection with server with command: showmount -e ftp and result is: mount clntudp_create: RPC: Port mapper failure - RPC: Unable to receive
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Mar 1, 2011
I seem to have another issue with my raid system
mount -a
mount: special device UUID=fb518c74:2b6bd0f4:66db5ce6:7e004239 does not exist
but when i do mdadm -vv --detail /dev/md5 ... this is what i get --->
/dev/md5:
Version : 1.1
Creation Time : Fri Feb 25 14:07:36 2011
Raid Level : raid1
[code]....
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Mar 10, 2010
For several months I've been running a Centos 5.3 server on a home network. The server hosts PHP, Postgres and lighttpd and other open source software bundle into a system I call RIMS. PHP, Postgres and lighttpd and other open source software were compiled from tar files. All Windows machines on the network can access RIMS via lighttpd. No special firewall rules are required on the PCs or on the 5.3 server.
With the release of Centos 5.4 I decided to do a major upgrade to MJR and built a new 5.4 server using a minimal install from CD1, with all options deselected. The details of the installation are available at http://pastebin.centos.org/31877. I added gcc, gcc-c++, m4, make, mlocate and vixie-cron using yum, to give me a compiler and a search capability on the new server.
Problem: when I compile and start lighttpd (or nginx or httpd) on the new server none of the Windows PC can connect to the server - they time out waiting for a connection. I didn't discover this until I'd installed a lot of open source software on the server, so I went back and rebuilt the server with only lighttpd on it, but the problem persists.
I thought it might be a firewall or Selinux problem so I compared the Selinux variables on the 5.3 server with those on the 5.4 server and they are basically the same. Setting httpd_can_network_connect on doesn't make any difference. I also compared the iptables script on both servers and they are the same. I've run nmap on the 5.4 server and it shows port 80 is open. The list of installed packages on the 5.4 server is available at [URL]...
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Jun 6, 2010
I created a encrypted volume on top of software raid1. These are my steps:
1. Create logical partition on sda
2. Create logical partition on sdb (same size)
3. Change type to partition to 'fd' for both partitions
4. Check that the both partitions are same size and type fdisk -l /dev/sda && fdisk -l /dev/sdb
5. partprobe
6. Make sure there are no remains from previous RAID installations on /dev/sdb by running: mdadm --zero-superblock /dev/sda6 mdadm --zero-superblock /dev/sdb6
7. mdadm --create /dev/md4 --level=1 --raid-disks=2 /dev/sda6 /dev/sdb6
8. watch cat /proc/mdstat
9. update mdadm.conf mdadm --examine --scan | grep mdx >> /etc/mdadm.conf
10. Load twofish module [root@localhost ~]# modprobe twofish
11. # cryptsetup -y -c twofish-cbc-essiv:sha256 create ftdata /dev/md4 Enter passphrase: Verify passphrase:
12. mkfs.ext3 -b 4096 -R stride=8 /dev/mapper/ftdata
13. mkdir /ftdata
14. Mount the encrypted volume:
mount -O noatime /dev/mapper/ftdata /ftdata
It mounts successfully this first time. When I cd /ftdata, I can see the lost+found dir
[Code]....
So why is it that I can't mount my encrypted volume after the first time? I am giving the correct password when it asks to.
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Sep 30, 2010
I have a finely working CentOS server. I want to clone the complete OS (over network) so that I can use it for same functionality on several other machines..
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Jul 9, 2010
I've been attempting to setup PXE/HTTP network installs so we can better handle deployments for new systems. I have a test CentOS 5.4 VM running, and another test VM that I want to deploy 5.4 to. TFTP, DHCP are all working correctly. Apache 2.2.3 config "seems" OK. When I kick off the VM which I will install to, DHCP discovery and IP allocation works, the TFTP server is found, I am presented with a menu option of OS selection.
I choose #1, for my 5.4 but then it immediately tells me:
"Invalid or corrupt kernel image"
/var/log/messages doesnt show anything other than the DHCP OFFER/ACK process and that TFTP client doesn't accept options
/var/log/httpd/error_log doesnt show anything either
Not sure where else to look for diagnosis.
My Apache config directory: /var/www/html/CentOS
Content listing:
[root@CentOS-test CentOS]# ls -la
total 4515700
drwxr-xr-x 4 root root 4096 Jul 9 10:38 .
drwxr-xr-x 3 root root 4096 Jul 8 16:46 ..
-rwxrwxrwx 1 root root 4619468800 Jul 6 15:54 CentOS5.4.iso
-rwxrwxrwx 1 root root 932 Jul 6 17:37 initrd.img
-rwxrwxrwx 1 root root 70 Jul 6 17:37 ks.cfg
drwxr-xr-x 2 root root 4096 Jul 9 10:38 msgs
-rw-r--r-- 1 root root 13100 Jul 9 10:37 pxelinux.0
drwxr-xr-x 2 root root 4096 Jul 9 10:38 pxelinux.cfg
-rw-r--r-- 1 root root 932 Jul 9 10:33 vmlinuz
pxelinux.cfg contains:
0A000000
default
pxeos.xml
My Apache DocumentRoot: /var/www/html/CentOS
Directives:
<Directory "/var/www/html/CentOS">
AllowOverride None
Options None
Order allow,deny
Allow from all
</Directory>
Forgot to add this line from my pxelinux.cfg/default file:
label 1
kernel 5.4/vmlinuz
append initrd=5.4/initrd.img ramdisk_size=16000 method=http:/10.37.129.3/CentOS ip=dhcp
(I think I have found my problem.. 5.4 was in the TFTPBOOT directory, but now that I'm using HTTP, I changed this to be:
kernel CentOS/vmlinuz and append initrd=CentOS/initrd.img) -- question is, will just changing this work?
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Jan 31, 2009
I am trying to setup a network bridged Server on Centos 5 like belows,
Broadband Router (NAT mode) ---> Bridged server (with t Proxy)--> Client PC .
after installing and configuring bridge, client can browse. But, i want to make this server working as a transparent proxy.But, my bridged proxy is not working. i need to use iptables command to make it properly.
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Apr 24, 2009
after a update to 5.3 from 5.2 via the built in updater the system stops responding to visitors from the outside, http that is, but heres the odd part, if i say run firefox on the server the connection works also for some reason if i'm on the network with my own computer the connection seems to stay open but as soon as i stop using these the server seems to drop the conenctions, but as i said as soon as i go via my comp to the server via say ie it works right away.
this i tried yesterday:did a cold boot to see if some update had problems and actually needed a reboot even if the updater didn't say, after it started the connection seemed to be open for a good while, and not untill this morning from a outside source the connection is droped again, not been on my comp nor logged on on the server today yet.the install only has on it what i got from the dvd, and as far as i know it has all the updates on it since 5.3 came out.my network is built up like this:
modem
|
firewall-switch-computers
[code]....
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May 19, 2011
I'm trying to setup a server to distribute CentOS 5.6 over a the network with PXE. I found and followed [URL] but that guide is certainly incomplete. I have DHCP working and other machines will try and boot but get a TFTP timeout. I don't plan on using Kickstart at this time. What do I need to do next? What am I missing?
[Code]....
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Feb 11, 2010
I am looking for a gigabit network card for my centos 5.4 server. I am looking for something known to work well with linux. I have been on the bestbuy site and I found a DLink (DGE-530T) card with support for linux from the vendor but after reading feedback from users with that card I am not so sure it is linux friendly. I am now thinking of buying online.
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Jul 6, 2010
We have a quad core Intel Xeon E 5410 processor running on recently installed centOS 5.5. Machine can't be pinged all of sudden and when we switch on the monitor, no signal on it, even no response on keyboard. We thought the problem accorded with abrupt temperature changes, is it so? But we have similar machines running efficiently under same temperature conditions.
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Jan 29, 2009
ok, we had to move one of our databases due to failing hardware. This box is newer than the old but it's just dog slow. 1st I thought it was mysql but now I am realizing it's the network. As a test, I tried copying a remote file to that box and the old server (located at the same co-lo, same provider), same switch, etc.Here are the results;
Old server:
access_log.1 100% 4192KB 1.4MB/s 00:03
New Server:
access_log.1 100% 4192KB 72.3KB/s 00:58
So now I see why people were complaining about webpage load times, etc. I can't figure out why the network latency. I looked around a bit, see below for some things, I thought mtu, nic speed, etc.
mii-tool shows;
eth0: 100 Mbit, full duplex, link ok
eth1: 100 Mbit, full duplex, link ok[code].....
Are there other things I can type to test or provide more feedback somehow to get more information.
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