软硬链接区别.txt

软链接  ln -s
	相当于 windows的快捷方式  符号链接
	和源文件使用不同一inode
	删除源文件，链接无效
	可跨文件系统(相当于Windows可以跨分区)

硬链接	ln
	相当于复制和同步更新 
	和源文件使用相同 inode 
	删除源文件，链接任然有效
	不可跨文件系统
# 1 1.hln 1.sln
This is source file 1
Now, I write this source file, what will happend?
Now, I write the hln file,what will happend?
Now, I write the sln file,what will happend?
Ok, We found,up change the three file content is same.
The next,We run /ls -l >> 1
总计 28
-rw-r--r-- 2 root root 240 01-26 07:04 1
-rw-r--r-- 2 root root 240 01-26 07:04 1.hln
lrwxrwxrwx 1 root root   1 01-26 07:00 1.sln -> 1
We found sln file block is "1"
hln and src file block is "240",equal

Well,now,We remove 1
we found : 1.sln is empty  1.hln is not change anything,
	just like the copy of 1
we move 1 to other dir,1.sln is wrong,but 1.hln is not
and finally,we are sure that:1 and 1.hln is always the same
whenever them is.let us say:1 is 1.hln, 1.hln is 1