Linux is the generic term for a UNIX-like open source operating system based on the Linux kernel.
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51 views
Network ping responses with very large times and other weirdness
I've been having a problem with a computer on a remote network and have been trying to figure out why it keeps having network issues (I would normally try to be on-site, but I am temporarily unable to ...
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50 views
Setup 1x RAID5 array with multiple LVs and differnt filesystems?
Centos 5.9 - 2.6.18-348.3.1.el5 i686
Raid5 - 4 Disks + 1 Spare (all WD RED 3TB)
Does it make sence to create multiple LV within the same VP and configure them as differnt filesystems:
Example:
LV1: ...
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51 views
Expanding raid5 software raid
I have recently bought 4 2TB drives to expand my existing 4*2TB raid5 setup, using mdadm software raid in debian. As a initial step, I have created a raid5 on the four new drives and created an ...
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114 views
ssh login attempts fail randomly - but work otherwise for same user
I'm having strange ssh login issues, where the login for a user does work in general, but sometimes it doesn't. here's a failed login attempt:
Mar 28 14:49:55 hostname sshd[32247]: Invalid user ...
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30 views
SAS/SCSI Errors in Syslog: Kernel FAILED
I have a Dell 2950 2U rackmount server with 3 146GB SAS drives in a RAID array, running Slackware 10.2 (an old version, I know). Recently I am seeing these errors in my /var/log/syslog repeating very ...
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73 views
CHMOD permission denied on SMB share
I'm mounting an SMB/CIFS share on my CentOS 6.4 server using /etc/fstab as follows:
Mount windows share to /mnt/mywebsite
//10.1.1.4/mywebsite /mnt/mywebsite cifs ...
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17 views
Set pam_unix password without knowing current password, having authenticated with pam_winbind
Right, so I have winbind authentication set up for login. However, I think there may still be some situations in which it would be useful for the user to be able to set their unix password (in the ...
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122 views
UDP socket receive buffer size change on RHEL6.3
Our system used to work on RHEL5.3 And the socket receive buffer size is 64k. And that works fine. We can get message size up to 64k on UDP socket.
But after system upgrade, it is running on RHEL6.3 ...
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148 views
Removing raid metadata from drives
Normally when I have a drive which contains raid metadata e.g. from fakeraid or a hardware raid card I can get rid of it with:
dmraid -r -E /dev/sdX
Or if that doesnt work, doing a simple dd ...
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36 views
Linux CLI program to verify/control nVidia hardware RAID?
I have a server with a Supermicro motherboard that has an nVidia RAID controller on board. When I boot up, I can hit F10 and see/modify the RAID settings.
However, I don't want to reboot this server ...
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117 views
arp reply is not processed
My eth0 interface does not process a legitimate arp reply.
When I try to ping a host, I see arp request and reply with tcpdump from the host I try to ping from, but ip neigh says that there is a ...
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0answers
95 views
Installing Linux server on USB stick
I am looking to rent 6 of these servers: http://www.hetzner.de/en/hosting/produkte_rootserver/ex4s
As you can see, the hard drives aren't server grade and they break a lot.
I was wondering if it's ...
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82 views
Ubuntu 12.10 cups 1.6 won't connect to my CentOS6 1.4.2 cups
Right now I have a CentOS 5 cups server, which runs cups 1.3.7 and the Ubuntu 12.10 users can't print to it because tehy use cups 1.6.
According to this bug, it is a regression in cups 1.6.
Trying ...
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349 views
Ubuntu, ruby 2, rails 4
I'm trying to setup a server, which has Ubuntu 10.04 LTS, Ruby 2.0.0-p0 and Rails 4 beta1. I can get everything installed but rails 4 has a slight error and I'd like to get someones opinion. When I do ...
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0answers
75 views
Cannot ping any machine on local network (embedded linux device)
I have an embedded linux installation (custom built using buildroot, uClibc and busybox) and I am unable to ping any machine on my local network. My /etc/network/interfaces file is as follows
auto lo
...
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73 views
NFS - Multiple Mounts, Heavy Write, Performance Degredation
I have 6 NFS Mounts (1GbE) on a RHEL 5.7 system with 10GbE.
Iperf shows full link saturation to all 6 interfaces simultaneously.
There is a bottleneck somewhere within the nfs client system, but I ...
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0answers
103 views
iptables log nowhere to be found
I'm trying to log when IPTables drops connections mostly for analysis. Problem is, my log seems to be written to... nowhere.
By this time I know that iptables logs through kern facility and for this, ...
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73 views
How to allow access to members of an LDAP-group via apache?
I am trying to allow members of a certain LDAP-group into a site I'm hosting via Apache. I've read the documentaion on this, but as I have lacking LDAP skills, I could not determine how to accomplish ...
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0answers
20 views
Monitor trap is received from agent
I have an agent that monitors windows event log and looks for service up/down messages, and sends these messages as trap to zenoss. The agent is set to be run in windows scheduler. The agent is ...
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207 views
Linux NIC bonding failure; strange CPU load
Note: An update as been added below
I'm having a very strange issue with a Linux server (Debian 6.0.6) using 802.3ad NIC bonding. Occasionally all of the NICs in the bond get marked as down and the ...
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55 views
Is it possible to upgrade physical disks in raid using hpacucli?
Is it possible to upgrade a RAID volume using hpacucli? For instance, i have a 4 disk Raid-10 array. If i replace each disk (of course allowing the raid to rebuild in each case), after all 4 disks ...
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107 views
Write issues on Linux Samba shares with OS X clients
Our web development company has a Linux server with a Samba share which employees use to develop websites. On the Samba share are numerous directories which serve as document roots for a webserver ...
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97 views
Processes getting stuck on 2 servers that have just updated
Just last night, ran a yum update on a couple of RHEL servers, I did manage to get a list of the packages but at least one of them seems to have caused a big problem.
The issue is that SSH to both ...
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162 views
Copying cause big iowait
I have dedicated server with 3 HDD. System disk, backup disk (same as system disk) and data disk. When I copy lot of data with cp (say, between backup disk and data disk) load average goes sky high.
...
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115 views
Linux: serial port forwarding via RDP to Windows machine
I'm trying to redirect serial device on /dev/ttyUSB0 to RDP session with Windows (XP or server 2003) through FreeRDP or rdesktop.
Like this for example:
xfrerdp /a:serial,COM3,/dev/ttyUSB0 /v:server
...
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154 views
Why are iptables rules needed for IPVS Load balancer to work?
I have setup a basic load balancer for http and https based on IPVS and linux virtual server. I start and configure ldirectord with the following configuration:
virtual = 172.22.9.100:80
real ...
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33 views
Domus Memory Used Issue With Xen On CentOS
Anyone know why I'm receiving this error? I compiled latest libvirt from source, I also tried with various rpm.
I would like to get memory used by domus and it looks like it's not working with Xen 3 ...
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0answers
75 views
CA root certificate in pam_ldap configuration will not work without tls_checkpeer no
Systems are Debian Squeeze and Ubuntu Precise with identical configurations. Version of libpam-ldap is 184-8.5 on both distros.
Everything works fine with the following configuration in ...
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600 views
Linux thin client OS supporting RDP 7.1 and PXE?
We are trying to come up with a workable solution for a number of branch offices. Thin clients (based on existing PC hardware) need to connect back to a Windows 2008 R2 RDS server farm with load ...
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38 views
OSPF on XEN host running several VMs
Is it possible to set OSPFs areas in a XEN environment to setup a virtual cluster? Main intention is to avoid a external router since all VMs will run inside the same machine.
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90 views
Enable bcrypt hashes for /etc/shadow in RHEL, CentOS, or Amazon Linux
Is it possible to add bcrypt support for system accounts (e.g., in /etc/shadow) in Amazon Linux? (Which is in turn binary compatible with RHEL5 and CentOS 5)
This only looks like a duplicate of this ...
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0answers
95 views
YSlow - Giving Fs for Expire and Compression, but response headers appear correct
I just moved a moderately busy wordpress site from shared hosting to a VPS server with 512MB ram and attempting to performance tune before I break down and buy another VPS to lighten the load. As such ...
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0answers
92 views
Error sh: line 9: 19705: Memory fault (coredump) in case of OpenSSH installation
I downloaded openssh-6.1.p1/tar.gz with http://mirror.corbina.net/pub/OpenBSD/OpenSSH/portable/. I made at first ./configure, then make which, it seems, fulfilled without errors (Nexenta Illumos ...
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76 views
Corrupt XFS header
On my file server I ended up growing the RAID (5) and then I went ahead and deleted and remade the partition holding the XFS filesystem. I used Parted to do this.
After parted ran I tried to mount ...
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0answers
405 views
NAT64 configuration with tayga on Debian 6
I'm trying to implement NAT64 with tayga on my server and came to a point where I'm not sure how to proceed.
My server is connected via one IPv4 address and one /64 IPv6 address block to the ...
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134 views
Automatically Start PPP USB Modem
I have a Verizon USB 3G modem that I want the connection to automatically start with on boot. In my Debian based system in /etc/network/interfaces I have the following:
auto ppp0
iface ppp0 inet ppp
...
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187 views
PPTP won't connect error 628
vim /etc/ppp/chap-secrets
# Secrets for authentication using CHAP
# client server secret IP addresses
#* pptpd 34fg3g93jgij3g *
and
vim /etc/radiusclient/servers
...
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0answers
142 views
Apache cached old ssl certificate
About 2 weeks ago I bought a new wildcard SSL certificate for all of my servers, and immediately tried to set it up on a server by replacing the old self-signed certificate settings. So, I put in the ...
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0answers
319 views
Unable to ping multicast IP
Let me prefix this by saying I'm not entirely clear on how multicast works. I have the gist of it, but not the underlying functionality.
A customer has configured a RHEL6 cluster between two Jboss ...
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0answers
34 views
Fedora 5 booting Issue
I have an issue in my fedora core 5, installed in HP Proliant ML 150 server. Till yesterday it was working fine but today when I started this it gave me the following error:
File system is ext2fs, ...
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0answers
294 views
openvpn refusing connections with freeradius
I installed openvpn and freeradius from yum and I installed the radiusplugin_v2.1a_beta1.tar.gz but I am having connection issues with the error:
XML-RPC: ConnectionRefusedError: 10061: No connection ...
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0answers
85 views
Hostname command does not work
I have a server where I am facing this strange issue that hostname command does not print anything.
[root@localhost ~]#/bin/hostname
[root@localhost ~]#
[root@localhost ~]# cat /etc/hosts
127.0.0.1 ...
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0answers
79 views
Cannot upgrade xenserver,pool master changes automatically to other server
I need to upgrade my XenServer pool of servers from 5.6 to 6.1. The problem i am facing is that when i shutdown pol master to boot it from CD, then it other member in the pool become the pool master ...
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0answers
191 views
Can IP tables allow specific DNS queries based on domain name?
I have iptables blocking all UDP traffic at the moment, however I want to allow only certain DNS queries to get through.
Let's use google.com as an example.
I am trying to use string matching to ...
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39 views
Process Accounting: Enabling Specific File Logging
I would like to thank everyone who reads this in advance for donating their time to hear my plea. I will try to be as clear as possible.
What I am trying to do is figure out a way to enable Process ...
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0answers
81 views
Spanish Characters in Linux Server Bash Shell
I have a database that contains Spanish words in it. It contains words like sueño which have "special characters" in them. The MySQL database collation is set to utf-8-general-ci which supports ...
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0answers
163 views
KVM USB Passthrough and Zydas usb wireless adapter: device or resource busy
i'm tring to setup a kernel testing virtualmachine for a 80211 module.
i start my machine with this command:
kvm -m 512 -net nic -net vde -usb -usbdevice host:0ace:1215 ktesting.img
i set up a ...
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0answers
51 views
Owner/Group issue on Mirror server
I am running Gluster-FS with a High-Availability Storage setup.
Both client and server nodes have NginX running to serve same files.
main.mysite.com
mirror1.mysite.com
..etc..
The problem is that ...
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0answers
36 views
Dedicated TMP and AMAVIS
I perfectly configured my server and now I made 2 stupid mistakes, I updated perl along with it's dependencies and I made a dedicated TMP dir and included it in fstab to prevent code execution with a ...
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87 views
Setting up VPN with wired and wireless connection
I have a VPN working for the wired connection but it doesn't seem to work for the wireless connection.
I'm trying to get a VPN set up with both a wired and wireless connection. So to do so, after ...
