Set CentOS 7 Wired Network To Automatically Connect

Java Application that we are currently using, read the IP information via using sigar library(sigar.getNetInterfaceConfig()

when we use the sigar.getNetInterfaceConfig(), it brings Primary Network Interface from the

server, and this is the problem for us.

we are using Centos server now and connected with 2 of network which are eth0, eth1.

we need to gather the IP from etho0, however in sigar, it brings the ip from eth1.

It seems that primary IP of current server set as eth1.

Therefore, we were looking for answer to modify primary IP at Centos, but could not find yet.

We really want to know how to modify or set up primary IP at Centos.

Thanks for reading such a long story from us.

Regards,

Kihong, Ko

ps. i used CentOS6

Hi all

This is bothering me too much, please tell me how to change IP address of remote machine while using ssh successfully.

I follow these steps:
1. connect to remote server using 'ssh root@server'
2. Edit '/etc/sysconfig/network-scripts/ifcfg-eth0' file
3. issue 'service network restart' command... (at this point ssh connection gets hanged)
4. Break from hanged ssh connection (<ENTER>~.)
5. Wait for some time to let service restart
6. Then finally, ssh with new ip address.

All is fine, but last time, i did something wrong while assigning new IP address, and after service restart, remote server didn't get new ip address - and now i cant connect to remote server.

Fortunately, i had a friend there, who helped me correct the problem so that i can connect again.

But what to do when there is no one to help? Is there other way i should approach this problem?

Thanks

I just installed Redhat 7 and try to config the network , add the IP address to network card , but I got the problem.

I modify the file /etc/sysconfig/network-scripts/ifcfg-enp0s3 , the configuration is as below , and then reboot .

DEVICE="enp0s3"
NETBOOT="yes"
HWADDR="08:00:27:15:38:B7"
TYPE="Ethernet"
BOOTPROTO="none"
NAME="enp0s3"
UUID="462f4834-4fe7-43a7-84e7-83b2722e94c1"
ONBOOT="yes"
IPADDR="192.168.1.1"
NETMASK="255.255.255.0"

After reboot , I use "ip addr show" still not shown the ip address , the ip address is still blank , would advise what is wrong ? thanks

I had used CentOS 6.6(desktop) before now install centos 7(desktop) on my pc.
In centOS 6.6 had “Connect to Server” in the Places menu, select “Public FTP” or “FTP (with login)” as the service type, enter the server name and other parameters (you can define bookmarks in this dialog box too),

But I cannot find it on centOS 7.I need to login Ftp via Connect to Server.

Hey all,

I just did a Debian minimal install and am using the package network-manager-gnome to manage wifi. I should also mention I'm running OpenBox. Anyway, network-manager shows up just fine in my systemtray and it lets me connect and displays that I am connected in the system tray. However, when I try to connect to a website it will just say "connecting" for a very long time before timing out. Note that my ethernet works perfectly.

If it helps, this is what shows up in iwconfig after I've "connected" to a network through network-manager:

Code:

wlan0     IEEE 802.11abgn  ESSID:"The Stack Resident Wifi"  
          Mode:Managed  Frequency:5.24 GHz  Access Point: 54:3D:37:02:A5:CC   
          Bit Rate=13 Mb/s   Tx-Power=15 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=33/70  Signal level=-77 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:154   Missed beacon:0

I've searched in many places and I couldn't find someone who had a similar problem. Any help would be awesome. Thanks!

Just fired up CentOS 6.5 on a brand new Dell laptop and when I go to /etc/sysconfig/network-scripts/ I dont see the ifcfg-eth0 etc. Are those not there because Network Manager is doing the work? I remember working with these a lot in the past. Sorry, I know this is a vague question.

Edit: Also wanted to know about this virbr0 interface, is this because I installed kvm and kvm related packages? Dont remember this being present in the past.

I believe this belongs in here (newbie) and not in Networking.

I'm completely starting out with networking. I have done some research, but I never ran networking commands in a serious way.

Is there an all purpose beginner guide to getting around a network, and learning basic troubleshooting skills? I'm using Ubuntu 14.04 in VirtualBox running on Windows 7 Professional.

I would like to get an understanding of statistics, how to map out my home network and networks I connect to and so on. So I'm interested in any help, any tips and etc.

Thanks!

I have a virtual machine on VmWare 10.0.1
Right now I am trying to make it a web server, apache works and machine has access to the Internet and i can even ping it from other pc from my network but can not connect to it by telnet.
Iptables is set to let everything inside and outside apache works.
PS Sorry for the stupid questions and bad english.

Hello There


I have an issue in file permission,I have configured an samba share drive,
created user and then shared it with other network computer(WINDOWS 7)

whenever an user creates an folder or file (like Excel) it shows up in read only mode..

I have ran the command :- chmod -R 777 <sharedFolder>

still when the users create a new folder, other cannot edit or modify the file

need help

Hi all,
I am brand new to Linux, playing around a bit with different things to see how I can use it in the future. Here is my problem:

I have written a simple program in Ada that works well on windows. It opens a TCP port (20000) and listens for incoming connections. I tried it on my internal network and it works well. I can connect from other windows machines and even from my Linux machine.

Now I moved the program to Linux and compiled it there. It starts ok and then listens for the connections. I can connect to it from that same Linux machine but not from any other machine on my network.

I checked the firewall status on Linux with ufw status and it is disabled. I also tried to add a rule to the iptables with
iptables -A INPUT -p tcp --dport 20000 -j ACCEPT

but still nothing. I can not connect from another machine on my network. I also tried to open a simple telnet connection from a windows machine and that too is blocked. I thought without the firewall all incoming connections would be allowed but obviously something is not working as I thought.

Any help would be greatly appreciated