1, Configure smtp service, reject the mail from remote.test

install postfix, installed before.

copy from access,

cd /etc/postfix/
vim access


copy following lines, 

<pre name="code" class="plain">#    /etc/postfix/main.cf:
#        smtpd_client_restrictions =
#            check_client_access hash: /etc/postfix/access


copy to /etc/postfix/main.cf, and switch on, 

/etc/postfix/main.cf: smtpd_client_restrictions =  check_client_access hash: /etc/postfix/access


modify the access document, add one line, 

192.168.0.254 REJECT


2, Configure the NFS service, make the share folder as masque folder,

create the folder,

Mkdir /data/{read，write} -p
Mkdir /export/{read,write} -p


modify the fstab 

vim /etc/fstab
/data/read /export/read none bind 0 0
/data/write /export/write none bind 0 0


mount all, 

mount -a


modify the export configuration, 

Vim /etc/exports


add two lines, 

/exports/read *.example.com(rw,sync)
/exports/write *.example.com(rw,sync)


map all users to anonymous user, add parameter as "all_squash"

allow root user to login as root, and own root user access right, add parameter  "no_root_squash"


3, edit the boot parameter, add kernctl=5,

vim /boot/grub/grub.conf


add the parameter kernctl=5

to test the result, reboot the system and use the command,

cat /proc/cmdline