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How to configure static IP address on CentOS

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How to configure static IP address on CentOS 

By default CentOS minimal install does not come with pre-configure network. In this small tutorial i will explain how to set static ip address on CentOS 6.5 minimal.
First, need to edit the set up for the ethernet. Let’s start with editing this file:

EDIT Device:
# vi /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
HWADDR=DC:41:A9:52:4E:6D
TYPE=Ethernet
ONBOOT=yes
BOOTPROTO=none
IPV6INIT=no
USERCTL=no
NM_CONTROLLED=yes
PEERDNS=yes
IPADDR=192.168.1.10
NETMASK=255.255.255.0
Now, configure default getaway:

EDIT Network:
# vi /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=centos6
GATEWAY=192.168.1.1
Configure DNS Server

EDIT DNS:
# vi /etc/resolv.conf
nameserver 8.8.8.8
nameserver 8.8.4.4

Now restart the network interface:
# /etc/init.d/networking restart
Check eth0:

check configuration:
# ifconfig eth0
eth0 Link encap:Ethernet HWaddr DC:41:A9:52:4E:6D
inet addr:192.168.1.10 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::799f:e441:a0f6:8562/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:63262 errors:0 dropped:0 overruns:0 frame:0
TX packets:32456 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:111111111 (233.0 MiB) TX bytes:11111111 (139.0 MiB)


How to Unzip zip files in CentOS

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Installing unzip on CentOS 7:
On CentOS 7, the unzip package may not be installed by default. But it is available in the official package repository of CentOS 7. So it is very easy to install.

First update the YUM package repository cache with the following command:

#sudo yum makecache

Now install unzip with the following command:

# sudo yum install unzip

check whether unzip works, run the following command:

# unzip -v
 

Listing the Contents of the Zip file using unzip Command:
You can list all the files and directories stored inside a Zip file with the following command:

$ unzip -l app.zip

Extracting a Zip File using unzip Command:
You can extract a Zip file using the unzip command very easily.

To extract a Zip file into the current directory where the zip file is, run the following command:

$ unzip app.zip

Unzip zip files in command line in CentOS

To unzip a zip folder, use the unzip command followed by the name of the zip file.

unzip file.zip

The unzip command in CentOS will unzip the zip file to the current working directory.

Unzip zip file to specific directory

With -d option we can specify the directory, which we want to extract files.

unzip -d /tmp file.zip

This time CentOS unzip command will extract the zip file to the /tmp directory.

Centos 8 install SSH service step by step

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Centos 8 install SSH service step by step
Install the openssh package:
# dnf install openssh-server
Start the OpenSSH service by executing the following command:
# systemctl start sshd
Check the status of the sshd service.
# systemctl status sshd
Enable the SSH service to start after the reboot:
# systemctl enable sshd
Open the firewall rules to accept incoming traffic on SSH default port 22:
# firewall-cmd --zone=public --permanent --add-service=ssh
Connect to the SSH server with IP eg. 10.1.1.1 as the root user from a remote client machine:
$ ssh Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра..6

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