Some basic Centos operations on KVM virtual machines, kvmcentos

Some basic Centos operations on KVM virtual machines, kvmcentos

After applying for a KVM/VPS virtual machine, generally the installed systems are Linux, such as commonly used Centos;

With the host, we usually build web servers, ftp servers, and compilation servers. For these common items, some basic operations are listed below.

First, you need to know the Host ip address and ssh listening port number. With the listening port number, you can use ssh/telnet to connect to the host.

// 1. Install Tear-Term locally in Windows. You can install Termius on your mobile phone for ssh connection to the host.

For the access port, see

View ip: ip addr

View the port (usually 22, but the port is usually modified): cat/etc/ssh/sshd_config

// 2. Install the http server. You can directly open the ip address in the browser during the test.

Yum install httpd

Service httpd start

// 3. Install net-tools to execute similar netstat-an commands

Yum install net-tools

// 4. Download the speed test tool

Speedtest. py

Wget https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py

Chmod + x speedtest. py

./Speedtest. py

// 5. install ftp

Yum install vsftpd

Service vsftpd start

Vi/etc/vsftpd. conf

Disable Anonymous Access

Anonymous_enable = NO

// 6. Install gcc, g ++

Yum install gcc

Yum install gcc-c ++

// 7. Add sudo service permission for user xxx

Reference: http://blog.csdn.net/dahangg/article/details/50537666

Vim/etc/sudoers

Xxx ALL = (ALL) NOPASSWD:/sbin/service

(Add USER command adduser xxx modify user password method passwd xxx)

// 8. Uninstall the software

For example, detach vsftpd

Yum remove vsftpd

Other common commands:

Which search for commands or programs

Find.-name "aab *" Search for files starting with aab

Ls-l list details

Chmod + x Add execution permission

Adduser

Passwd Change Password

Vi edit text

Cat view text content