Tagged Questions

1
vote
1answer
28 views

Bonded Interface Pair Performance Difference b/w CentOS 6 and RHEL 6

I have two new dell servers, both pretty close to the same hardware. One has RHEL6 installed and one has CentOS 6 installed. I have the machines configured identically from a network-scripts, ...
2
votes
2answers
66 views

How to automate connecting to multiple network devices, running a command and saving the output to a file?

I have to run a command on around 1000 network devices and save the output to a file. In a file I have a list of all the network device names that have to be connected to using SSH. I then have to run ...
3
votes
0answers
129 views

I opened a port with iptables but still doesnt work

I have a CentOS installation as a guest VM with VirtualBox. I have two ethernet interfaces, eth0 with NAT and DHCP, and eth1 with Host-only adaptor and static IP. I have oracle installed in this ...
1
vote
3answers
200 views

How to install Redhat using the iso image stored on Network

This is the case. I want to install the Redhat 5.6 on my system. But this time i dont want to use the actual DVD but this time i want to install it using the iso image stored on one of our server HDD. ...
3
votes
1answer
1k views

How do I configure the network interfaces persistently in CentOS so it will survive a reboot?

I configured a network interface with the following commands: ifconfig eth0 up ip addr add 192.168.9.1/28 dev eth0 route add default gw 192.168.0.1 This works. However, when I reboot the machine I ...
1
vote
0answers
429 views

Can't ping first IP with dual NICs on different subnets with multiple gateways

I have two NICs assigned to a server. eth0 - 10.199.10.0/24 w/ a GW of 10.199.10.1 eth1 - 10.199.20.0/24 w/ a GW of 10.199.20.1 From my desktop, I can ping the IP assigned to each NIC just fine ...
0
votes
1answer
556 views

How can I make the NetworkManager work?

I am running a version of RHCE6 on my laptop, and lately I've been trying various stuff about network configuration through command line. Last night, I tried removing the NetworkManager using "yum ...
2
votes
2answers
147 views

Set internet connection order or preference

I have SL 6.3 installed on two machines. Machine A is a workstation and has two interface eth0 and wlan0. Using eth0, it is connected to Machine B (public facing server) with static IP address. Both ...
0
votes
0answers
285 views

Changes made to ifcfg-wlan0 doesn't seem to make a difference

I am running RHEL6 on my laptop. The wireless adapter configuration file ifcfg-wlan0 didn't come by default under /etc/sysconfig/network-scripts. So I created it myself. The problem is, whatever ...
2
votes
2answers
2k views

Where could I find the ifcfg-eth0 file?

I am using RHEL6, but I could not find the Ethernet interface configuration file ifcfg-eth0 under /etc/sysconfig/network-scripts. Issuing ifconfig -a shows that eth0 does exist. Could it be that the ...
1
vote
1answer
154 views

How to get the cloned guest connected to the Internet?

I made a clone of a VM(running a version of Centos 6) on KVM, but the clone wouldn't connect to the Internet. Issuing ifconfig shows no interfaces but the lo. Interestingly, the original system can ...
3
votes
2answers
465 views

How do you configure the MTU for all network adapters via a script?

NOTE: This is for RHEL/centOS. Currently my way of configuring the MTU is via GUI using system-config-network and setting the MTU to 4096. I would like a non-interactive script to do this instead. ...
2
votes
1answer
540 views

RHEL how to sync network settings between GUI and configuration files in /etc/sysconfig/network-scripts/?

In RHEL, we can change network settings either using GUI or editing the configuration files in /etc/sysconfig/network-scripts/. I would like to know how the network settings (e.g. IP address, ...
3
votes
2answers
2k views

Determining NIC designation from PCI address

I am in the process of upgrading a legacy system from RHEL 5.4 to 5.8. There are three NICs installed, each with defined IP addresses and attached wiring. After the upgrade, the cards are on the same ...
0
votes
2answers
160 views

What creates /etc/hosts (RHEL 5.5)

How does /etc/hosts get created on RHEL 5.5? It's not owned by any RPM and if deleted, it doesn't reappear on reboot, so apparently it's not a service created it. Does anaconda create it by default ...
2
votes
1answer
526 views

Add another IP address to a Bonding Interface

I have a Linux network Bonding interface for two Ethernet interfaces (eth0 and eth1) $ cat /etc/sysconfig/network-scripts/ifcfg-bond0 DEVICE=bond0 BOOTPROTO=static ONBOOT=yes ...
1
vote
0answers
399 views

Printing failure at a network printer in linux

I added a network printer to my network by the RedHat Enterprise workstation 6 linux GUI. It seemed that the printer setting did find the network printer. However, whenever I tried to print, the job ...
1
vote
1answer
2k views

DNS Issues on RHEL 6

I'm experiencing some DNS issues on a new RHEL 6 virtual machine. Ping is working fine to an IP, but the machine is unable to resolve any names. I've tried adding Google's DNS servers (8.8.8.8 and ...
5
votes
2answers
19k views

Static IPv4 & IPv6 configuration on CentOS 6.2

I try to configure static IPv4 & IPv6 configuration on CentOS 6.2. The configuration below works perfectly : # ifconfig eth0 x.x.x.x/29 # route add defalt gw x.x.x.y # ip addr add dev eth0 ...
0
votes
0answers
836 views

Multiple network adapters with Virtualbox guests?

I'm running VBox under Mac OS with multiple Linux guests (Redhat). Everything works fine except I want to test dual NICs in one of my guests. I'm using host-only adapters and would like to simulate ...
1
vote
2answers
2k views

Can ping any hosts but localhost. What's wrong?

I got a freshly installed red hat box on a server. I can ping another machine on the network usnig both ip and server name but I can't ping localhost or 127.0.0.1 or 192.168.4.42 (local ip) ...
4
votes
2answers
5k views

Oracle Linux 6.1 guest on Virtualbox 4.1 can't connect to network

I just installed VirtualBox 4.1 on my Windows system, and then added a Solaris 11 Express guest and an Oracle Linux 6.1 guest. Both installs went smoothly. But while the Solaris 11 guest has network ...
1
vote
1answer
599 views

New SL6 system: No hostname?

This is in regards to Scientific Linux 6.1 system, but should also apply to CentOS 6.1 & RHEL 6.1. I am setting up a new Scientific Linux 6.1 system, using kickstart and DHCP (via xCAT). This ...
1
vote
2answers
644 views

Check the Existence of a Network Interface Card Redhat

I'm aware that I can use ethtool eth0|eth1|eth2 to check the existence of a NIC. But I wonder where the files are on the machine that contain information of an existing interface, as I need to use ...
5
votes
1answer
986 views

Changing Redhat Network Settings From DHCP to STATIC IP Via Configuration Files

In order to make the statically assigned IP work, I have already modified the file /etc/sysconfig/network-scripts/ifcfg-eth0 as follows: DEVICE=eth0 IPADDR=10.33.17.143 NETMASK=255.255.255.0 ...
1
vote
1answer
730 views

Redhat Network Service Restart

I modified the /etc/sysconfig/network-scripts/ifcfg-eth0 file to set a static ip for my redhat. Then I tried to use command "service network restart" to make the change stick, however, it became stuck ...
8
votes
1answer
366 views

Bandwidth control in linux

How do I control both the inbound and outbound bandwidth in a RHEL 5 router?
2
votes
3answers
803 views

Static DNS setup on client of shared internet connection

I've 2 linux computers, one redhat (client), and one ubuntu (set up with shared internet connection as described here) At the moment, on the wired connection between the computers, I can ping the ...