1, partition tips:
Database Configuration:
/ 100-200G
/boot 200m
swap memory 1.5-2 times
/data 800G
(Recommended lvm partition slight loss in performance)
Application Configuration
/boot 200m
swap memory 1.5-2 times
/ 200G
2, configure telnet
(1) configure a local source yum
/etc/yum.repos.d/CentOS-Base.repo back up the configuration file, and then modify
The mirrorlist all commented out, will baseurl all changed file: /// mnt
(2) mount the mirror mounting plate
Determining whether to mount the mirror mounting plate, after loading with mount / dev / cdrom / mnt
The mirror mount to / mnt
（3）yum clean all
yum makecache
yum list
Upon completion can be directly installed yum
(4) mounted telnet
# yum install telnet
# yum install telnet-server
# yum install xined
Verify: # rpm -qa grep telnet
# rpm -qa grep xined
After the installation is complete, xinetd, telnet service added boot from the start:
# systemctl enable xinetd.service
# systemctl enable telnet.socket
Start Service
systemctl start xinetd.service
systemctl start telnet.socket
verification:
systemctl status telnet.scoket
systemctl status xinetd
(5) Enable the root login
Directly mv / etc / securetty securetty.bak
(6) turn off the firewall
Temporary closure systemctl stop firewalld
Permanently closed systemctl disable firewalld
At this point we can have a telnet
After the telnet connection is recommended to install ssh and telnet ban