Install centos for the first time and perform some basic configurations

After you install CentOs for the first time, you still need to do some things to better use the operating system.

Close selinux

selinux is a software that is indeed very powerful, but it is too complicated, and it also overrides root. His limits cannot be exceeded. Therefore, we usually close him. The method to turn it off is very simple. Find the configuration file

vi /etc/sysconfig/selinux

and change enforcing to disabled.

Turn off the firewall

It is generally recommended to turn off the firewall function when learning to use centOS. Of course, it's another matter if you know how to use a firewall. If the firewall is not turned off, the external ports of the server, such as 80 and 443, will not be open. Turning off the firewall is also very simple, just follow the following commands:

systemctl stop firewalld
systemctl disable firewalld
systemctl stop iptables
systemctl disable iptables

The disable option means that the software will still be closed when you restart next time.

Configure static IP

First find the configuration file, CentOS is usually in /etc/sysconfit/network-scripts/ifcfg-etho

DEVICE=eth0
HWADDR=00:0C:29:F5:1D:6A
TYPE=Ethernet
UUID=8f49ebc2-5b1b-4135-863b-6acb0c84453f
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=static 
IPADDR=192.168.179.13 
NETMASK=255.255.255.0
GATEWAY=192.168.179.2
DNS1=192.168.179.2

There are a few things to note

• BOOTPROTO needs to be set to static, which means static ip

• ONBOOT needs to be set to ON, which means it is turned on .

• IPADDR represents the ip address

• NETMASK represents the subnet mask

• GATEWAY represents the gateway address ,

• DNS, if you want to connect to the external network, you need to set up DNS.

After setting up, restart the network card and test whether it is normal.

/etc/init.d/network restart

Use the ping command to ping the gateway address and external network address respectively to see if they are normal.

Set the language

Sometimes after installing the Linux system, the language may be Chinese. It is recommended to change it to English. Many Chinese explanations is not accurate. In addition, it may have an impact on your writing of shell scripts.

Check the languages ​​supported by the system

# locale -a
aa_DJ
aa_DJ.iso88591
aa_DJ.utf8
aa_ER
aa_ER@saaho
aa_ER.utf8
……

Check the language currently used

# echo $LANG
en_US.UTF-8

You can see that the language currently used by my server is en_US.UTF-8 . This is also the language family I recommend.

Modify the language at zero time

LANG=zh_CN.UTF-8

Permanently modify the language, find the configuration file

vim /etc/locale.conf

Then, change to the language you want

Install gcc, wget and other software

In Centos, yum is used to install software online, but the premise is that there is no problem with your yum source. Generally speaking, the yum of newly installed systems is normal. Common yum sources are Alibaba and NetEase. With the tool yum, installing software is very simple.

yum install gcc wget git

Then keep typing y and that’s it.

The above is the detailed content of Install centos for the first time and perform some basic configurations. For more information, please follow other related articles on the PHP Chinese website!