issue #2485, If a permanent IP address and hostname has alread in /etc/hosts
issue #2485, If a permanent IP address and hostname has alread in /etc/hosts

Signed-off-by: dongmx <3c115a96d108f1432d7dbc901fdfc9770e567384@xueqiu.com>

miqui/machine,xinxian0458/machine,thaJeztah/machine,denverdino/denverdino.github.io,ppadala/machine,londoncalling/docker.github.io,londoncalling/docker.github.io,LuisBosquez/docker.github.io,JohnKDay/machine,sanscontext/docker.github.io,phiroict/docker,joaofnfernandes/docker.github.io,thaJeztah/docker.github.io,sebadiaz/machine,jzwlqx/denverdino.github.io,otherjason/machine,bdwill/docker.github.io,joeuo/docker.github.io,menglingwei/denverdino.github.io,denverdino/docker.github.io,sebadiaz/machine,ppadala/machine,denverdino/machine,skatsuta/machine,larsla/machine,SvenDowideit/machine,aduermael/docker.github.io,docker/docker.github.io,xinxian0458/machine,skatsuta/machine,jsirois/machine,otherjason/machine,bdwill/docker.github.io,menglingwei/machine,joaofnfernandes/docker.github.io,gdevillele/docker.github.io,tpires/machine,troy0820/docker.github.io,jsirois/machine,aduermael/docker.github.io,docker-zh/docker.github.io,rillig/docker.github.io,danix800/docker.github.io,miqui/machine,kunalkushwaha/machine,wzymaster/machine,pottava/machine,menglingwei/denverdino.github.io,BSWANG/denverdino.github.io,jeffellin/machine,BSWANG/denverdino.github.io,dgageot/machine,bdwill/docker.github.io,shubheksha/docker.github.io,StackPointCloud/machine,ppadala/machine,zchee/machine,kacole2/machine,alexisbellido/docker.github.io,shin-/docker.github.io,StackPointCloud/machine,ibuildthecloud/machine,JohnKDay/machine,juliengarcia/machine,shin-/docker.github.io,soleo/machine,voutilad/machine,anweiss/docker.github.io,tyrken/machine,tyrken/machine,errordeveloper/machine,jeffellin/machine,docker/docker.github.io,joeuo/docker.github.io,juliengarcia/machine,kunalkushwaha/machine,jgsqware/machine,denverdino/docker.github.io,jmelis/machine,johnstep/docker.github.io,aduermael/docker.github.io,menglingwei/denverdino.github.io,anweiss/docker.github.io,rillig/docker.github.io,shubheksha/docker.github.io,shin-/docker.github.io,flavio/machine,jmelis/machine,exoscale/docker-machine,soleo/machine,kacole2/machine,aduermael/docker.github.io,JimGalasyn/docker.github.io,docker-zh/docker.github.io,troy0820/docker.github.io,bgokden/machine,xinxian0458/machine,jeanlaurent/machine,joeuo/docker.github.io,menglingwei/denverdino.github.io,jeanlaurent/machine,jzwlqx/denverdino.github.io,bdwill/docker.github.io,dweomer/docker-machine,skatsuta/machine,menglingwei/denverdino.github.io,londoncalling/machine,jgsqware/machine,jeffellin/machine,LuisBosquez/docker.github.io,sanscontext/docker.github.io,johnstep/docker.github.io,askb/machine,anweiss/docker.github.io,errordeveloper/machine,alexisbellido/docker.github.io,JohnKDay/machine,johnstep/docker.github.io,faijaz/docker-machine,robertbreker/machine,shubheksha/docker.github.io,jmelis/machine,londoncalling/docker.github.io,alexisbellido/docker.github.io,jzwlqx/denverdino.github.io,sebadiaz/machine,moxiegirl/machine,denverdino/denverdino.github.io,anweiss/docker.github.io,Herbis/machine,jzwlqx/denverdino.github.io,phiroict/docker,denverdino/denverdino.github.io,docker/docker.github.io,alexisbellido/docker.github.io,thaJeztah/machine,tyrken/machine,JimGalasyn/docker.github.io,robertbreker/machine,SvenDowideit/machine,JimGalasyn/docker.github.io,denverdino/denverdino.github.io,denverdino/machine,danix800/docker.github.io,StackPointCloud/machine,shubheksha/docker.github.io,londoncalling/machine,shubheksha/docker.github.io,soleo/machine,juliengarcia/machine,cvstebut/machine,thaJeztah/docker.github.io,phiroict/docker,bgokden/machine,bgokden/machine,kunalkushwaha/machine,faijaz/docker-machine,miqui/machine,flavio/machine,joaofnfernandes/docker.github.io,sanscontext/docker.github.io,docker-zh/docker.github.io,askb/machine,sanscontext/docker.github.io,askb/machine,wzymaster/machine,danix800/docker.github.io,thaJeztah/machine,cvstebut/machine,gdevillele/docker.github.io,shin-/docker.github.io,tpires/machine,anweiss/docker.github.io,gdevillele/docker.github.io,BSWANG/denverdino.github.io,menglingwei/machine,thaJeztah/docker.github.io,BSWANG/denverdino.github.io,joeuo/docker.github.io,robertbreker/machine,docker/machine,denverdino/machine,jeanlaurent/machine,alexisbellido/docker.github.io,phiroict/docker,joeuo/docker.github.io,danix800/docker.github.io,zchee/machine,dgageot/machine,JimGalasyn/docker.github.io,LuisBosquez/docker.github.io,johnstep/docker.github.io,denverdino/denverdino.github.io,otherjason/machine,denverdino/docker.github.io,jgsqware/machine,joaofnfernandes/docker.github.io,pottava/machine,gdevillele/docker.github.io,docker/docker.github.io,docker/docker.github.io,LuisBosquez/docker.github.io,robvanmieghem/machine,sanscontext/docker.github.io,moxiegirl/machine,wzymaster/machine,faijaz/docker-machine,denverdino/docker.github.io,docker/machine,joaofnfernandes/docker.github.io,cvstebut/machine,londoncalling/docker.github.io,gdevillele/docker.github.io,jsirois/machine,johnstep/docker.github.io,pottava/machine,docker-zh/docker.github.io,dweomer/docker-machine,troy0820/docker.github.io,phiroict/docker,errordeveloper/machine,moxiegirl/machine,shin-/docker.github.io,rillig/docker.github.io,thaJeztah/docker.github.io,jzwlqx/denverdino.github.io,BSWANG/denverdino.github.io,tpires/machine,bdwill/docker.github.io,rillig/docker.github.io,larsla/machine,kacole2/machine,robvanmieghem/machine,exoscale/docker-machine,denverdino/docker.github.io,robvanmieghem/machine,zchee/machine,JimGalasyn/docker.github.io,thaJeztah/docker.github.io,Herbis/machine,voutilad/machine,ibuildthecloud/machine,docker-zh/docker.github.io,menglingwei/machine,LuisBosquez/docker.github.io,londoncalling/docker.github.io,troy0820/docker.github.io