-- -- -- -- -- -- -- -- -- -- -- -- selinux
[root @ test01 sysconfig] # vi/etc/selinux/config
Reboot
[root @ test01 sysconfig] # sestatus

-- -- -- -- -- -- -- -- -- --
firewall[root @ test01 sysconfig] # systemctl status firewalld. Service
[root @ test01 sysconfig] # systemctl stop firewalld. Service
[root @ test01 sysconfig] # systemctl disable firewalld. Service
-- -- -- -- -- -- -- -- -- -- -- the SSHD
/root @ test01 ~ # service status SSHD

-- -- -- -- -- -- -- -- -- -- -- --
modify the virtual memory configuration[root @ test01 opt] # echo '* soft as unlimited & gt;> The/etc/security/limits. Conf
[root @ test01 opt] # echo '* hard as unlimited & gt;> The/etc/security/limits. Conf


-- -- -- -- -- -- -- -- -- -- close transparent_hugepage parameter
/root @ test01 ~ # vi/etc/default/grub
GRUB_CMDLINE_LINUX="crashkernel=auto rd. LVM. Lv=centos/root rd., LVM. The lv=centos/swap RHGB quiet transparent_hugepage=never"
[root @ test01 opt] # grub2 - mkconfig -o/boot/grub2/grub. CFG
Restart the
[root @ test01 opt] # cat/sys/kernel/mm/transparent_hugepage/enabled