rsync同步文件时报错：
rsync: failed to connect to xxx: Permission denied (13)rsync error: error in socket IO (code 10) at clientserver.c(124) [receiver=3.0.6]
出现这个错误是因为selinux， linux安全增强的补丁导致的。
解决方法是禁用selinux的安全增强， 可以使用命令 setenforce 0来临时禁用，或者通过修改配置文件/etc/sysconfig/selinux 添加 SELINUX=disabled来永久禁用
# This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: # enforcing - SELinux security policy is enforced. # permissive - SELinux prints warnings instead of enforcing. # disabled - No SELinux policy is loaded. SELINUX=disabled # SELINUXTYPE= can take one of these two values: # targeted - Targeted processes are protected, # mls - Multi Level Security protection. SELINUXTYPE=targeted