CentOS

Hi, I have two Centos computers : A and B. Each has a static IP address assigned on the network card (eth0). Recently, I put another network card on A, and called it eth1. I want to use eth0 on A for LAN, and to connect eth1 on A to eth0 on B through a cross-over cable. Question: Can I use same stat...

Hi,
I got the following message on the screen:
"User(Name) is logged in on seat 0".

I am just curious what is the cause of it.

Thanks.

Hi, I have tried to upgrade to Centos 8 from Centos 7 by following someone's posted procedures on web. When I got to rpm -e `rpm -e kernel` I got the following messages and could not move on to the next step: error: Failed dependencies: kernel >= 3.10.0-384.el7 is needed by (installed) hypervvssd-0-...

Hi, I am going to connect two PCs with a cross-over cable. It seems to me that, based on the information on internet, one of the PC's IP needs to be DHCP. Can I connect them and communicate with static IP addresses on both? I supposed it should not be difficult at all. Can someone point me to the ri...

Hi,
Just curious when one upgrades from Centos 7 to 8, can all the softwares installed in 7 run in 8?

Hi,
Thanks for the reply.
I used to use TCP wrapper hosts.allow and hosts.deny to limit IP address access on ssh. I tried it on Centos8, but it did not work. I later found out it is deprecated now.
I am going to try iptable to see whether it will work.
Any hints or tips?

Hi, I am trying to set up to allow only several static IP address computers to have assess to a server through ssh or sftp. I have a created a active/default zone with only ssh server with a different port number. So far so good. I tried firewall-cmd --permanent --add-source=192.168.2.50 (static IP ...

Hi, I need to remote backup files from three different /home/user /directories on a client to the data server computer with the same /home/user directories. I have already set up passwordless ssh between all these accounts in order to use rsync to fetch the data from one /home/user (client) to /home...

Hi, I have a simple question about ssh port numbers. I have one local data server (Centos 8) and bunch of local clients (Centos 7). The first thing that we do is to use "rsync" to fetch all the data from the clients to the data server. Secondly, people can use "sftp" remotely to download the data fr...

Hi, I have several computers at work that I need to figure out how connect them for ssh. All the computers are run on Centos 8 and 7, and are given a static IP address. 1. With Firewalld on Centos, do I still need TCP wrapper? Can I configure the ssh daemon and allowed IP addresses directly on Firew...