Vsftpd install:

# Allow anonymous FTP? (Beware - allowed by default if you comment this out).

anonymous_enable=NO

# Uncomment this to allow local users to log in.

local_enable=YES

#

# Uncomment this to enable any form of FTP write command.

write_enable=YES

# You may restrict local users to their home directories.  See the FAQ for

# the possible risks in this before using chroot_local_user or

# chroot_list_enable below.

chroot_local_user=NO

SSH install:

#on master:

ssh-keygen -t rsa -P ‘’

ssh-copy-id -i $HOME/.ssh/id_rsa.pub hadoop@slave

#on slave:

ssh-keygen -t rsa -P ‘’

ssh-copy-id -i $HOME/.ssh/id_rsa.pub hadoop@master

#这是为了让不管是master to slave ，还是 slave to master ，无密码SSH登录都能工作

SSH无密码登录就是嫌弃每次都要输密码，而且有些cronjob自动化跑的，每次都要输密码就不现实了。