centos7 installation process and host configuration

This article records the whole process of CentOS 7 64 bit installation on the virtual machine, which I downloaded for my future installation and use

Download address: http://mirrors.aliyun.com/centos/7/isos/x86_64/ Download centos-7-x86_-dvd-1908.iso

Configure the network environment

For the next step of the previous graphic, please refer to this article https://blog.csdn.net/babyxue/article/details/80970526 When selecting software, do not use graphic interface, that is, select infrastructure server in this step

After the installation is completed, ping www.baidu.com can't ping. ip addr shows that the network card is ens33. It prompts you to install VMware Tools. Double click each big bell sound of TAB, and the vi compiler will also have a bell sound. These are all to be handled

First, check whether the 64 bit version is installed, or the later operations will be wasted

getconf LONG_BIT

Step by step, first remove the ugly bell sound

# Remove the bell sound from the command line vi /etc/inputrc set bell-style none # Remove the bell sound of vi vi /etc/bashrc setterm -blength 0 # vi you can make the configuration effective through source /etc/bashrc

You need to restart it to take effect. It will not take effect here. Try to reload the resource

Configure the network environment

View virtual machine gateway

Configure NIC

Because the name of the centos7 network card is not the same as that of the previous centos6, you need to modify the name of the network card first

# First change the file to ifcfg-eth0 cd /etc/sysconfig/network-scripts mv ifcfg-ens33 ifcfg-eth0 # Change the device name to eth0 vi ifcfg-eth0 DEVICE=eth0 NAME=eth0 #Disable the predictable naming rule edit / etc/default/grub and add "net.ifnames=0 biosdevname=0" to grub ﹣ CmdLine ﹣ Linux /etc/default/grub //In grub? CmdLine? Linux=" quiet net.ifnames=0 biosdevname=0" #Rebuild GRUB configuration and update kernel parameters grub2-mkconfig -o /boot/grub2/grub.cfg # We need to restart it to take effect. We will not restart it temporarily. Then we will configure the network vi ifcfg-eth0 # Except for DEVICE and NAME, all other key values are deleted and reconfigured. Finally, this configuration should look like this DEVICE=eth0 NAME=eth0 TYPE=Ethernet ONBOOT=yes # ip address, mask and gateway, gateway is the gateway seen in the first step; ip must be in the same network segment with gateway IPADDR=192.168.189.100 NETMASK=255.255.255.0 GATEWAY=192.168.189.2 # dns address for domain name resolution DNS1=114.114.114.114
Restart to verify that the network is working

reboot ping www.baidu.com

Press ctrl+alt to install vmtools every time you switch between virtual machine and physical machine

Note: this step is not necessary, but a convenient step

# Mount cdrom. The device file is in / dev/cdrom. In fact, it points to / dev/sr0 mkdir /mnt/cdrom && mount /dev/cdrom /mnt/cdrom # Copy the vmtools file to the tmp directory and install cp VMwareTools-9.6.0-1294478.tar.gz /tmp tar -zx -f VMwareTools-9.6.0-1294478.tar.gz cd vmware-tools-distrib # After entering the directory, you can see that there is a vmware-install.pl # Check whether there is GCC environment. If not, install gcc gcc-c + + package first which gcc # Without gcc environment, install gcc environment first. Here, use that DVD image for local installation # 1. Reinstall the dvd image and mount the CDROM. 2. Configure the yum source as the local source cd /etc/yum.repos.d # Mask the underlying source and only use the mirror source mv CentOS-Base.repo CentOS-Base.repo1 # Configure local mirror source vi local.repo [localrepo] name = localrepo baseurl = file:///mnt/cdrom enable = 1 gpgcheck = 0 # Install gcc gcc-c++ yum clean all yum install -y gcc gcc-c++ # At this time, I failed to install vmtools. I said that I couldn't find the kernel header file. Check that the / usr / SRC / kernel directory is empty #1. Install kernel devel yum install -y kernel-devel #2. Establish symbolic link ln /usr/src/kernels/3.10.0-229.4.2.el7.x86_64/include/generated/uapi/linux/version.h /usr/src/kernels/3.10.0-229.4.2.el7.x86_64/include/linux/version.h # Install vmtools, and then it succeeds ./vmware-install.pl

Some basic configurations

At this time, we can use terminal tools such as xshell and secureCRT to connect to linux. If not, check whether iptables is turned off and sshd service is turned on

# Turn off firewall systemctl stop firewalld # View sshd service status systemctl status sshd.service

Command prompt configuration

When writing a command, if the prompt and output a color, the eyes will be blind to find the place where the command was first issued, so I usually configure the color for the command prompt

vi /etc/bashrc PS1='[\[\e[1;34m\]\u@\h\[\e[m\] \W]\$ ' PS1="\[\e[37;40m\][\[\e[32;40m\]\u\[\e[37;40m\]@\h \[\e[36;40m\]\w\[\e[0m\]]\\$ "

vim settings

About indentation

# tabstop refers to the width of how many spaces are indented by pressing the tab. softtabstop refers to the backspace key that can delete four spaces at a time # tabstop is equivalent to ts set tabstop=4 set softtabstop=4 # Shift width refers to the indent width when pressing shift plus > twice in normal mode, i.e., < < > > said on the Internet, with 8 spaces by default set shiftwidth=4 # set expandtab converts the input tab to a space set expandtab # vimrc Note in is not used # The complete setting is like this, so input tab is equivalent to input 4 spaces, and backspace can delete 4 spaces at a time set softtabstop=4 set shiftwidth=4 set expandtab

You can use set list to view the tab symbol, but at this time, the tab will become two spaces. I don't know why

My vim settings

Ignore case when set ignorecase is used for search

set nu set softtabstop=4 set shiftwidth=4 set expandtab set autoindent set ignorecase

Host name modification

When you use hostname to view the host name, it is displayed as localhost.localdomain. When you use hostname -i to view the ip address, it is not the ip address of the current host, which needs to be modified

vi /etc/hosts 127.0.0.1 localhost master 192.168.189.100 localhost master

Add alias configuration

vim /etc/bashrc alias grep='grep --color=auto' alias vi='vim' alias ll='ls -lth --color=auto'

Common software installation

jdk1.8 installation

This is a must. This host is ready to be a clone parent, so there are enough preparations. Unzip the installation package and configure the environment variables