ln 帮助说明
ln --help
Usage: ln [OPTION]... [-T] TARGET LINK_NAME (1st form)
or: ln [OPTION]... TARGET (2nd form)
or: ln [OPTION]... TARGET... DIRECTORY (3rd form)
or: ln [OPTION]... -t DIRECTORY TARGET... (4th form)
Mandatory arguments to long options are mandatory for short options too.
--backup[=CONTROL] make a backup of each existing destination file
-b like --backup but does not accept an argument
-d, -F, --directory allow the superuser to attempt to hard link
directories (note: will probably fail due to
system restrictions, even for the superuser)
-f, --force remove existing destination files
-i, --interactive prompt whether to remove destinations
-L, --logical dereference TARGETs that are symbolic links
-n, --no-dereference treat LINK_NAME as a normal file if
it is a symbolic link to a directory
-P, --physical make hard links directly to symbolic links
-r, --relative create symbolic links relative to link location
-s, --symbolic make symbolic links instead of hard links
-S, --suffix=SUFFIX override the usual backup suffix
-t, --target-directory=DIRECTORY specify the DIRECTORY in which to create
the links
-T, --no-target-directory treat LINK_NAME as a normal file always
-v, --verbose print name of each linked file
--help display this help and exit
--version output version information and exit
记录意义
每次使用ln -s创建软连接的时候都会忘记哪个是source，哪个是dst
#目的地 /home/mep/xml/
#源目录 /home/gsta/xml/
#期望：目的地里面的文件指向是源目录里面的文件
ln -s /home/gsta/xml /home/mep
备注:
创建目录软连接的时候，会把源目录，的一个软连接放到目的地的里面，而不是类似于copy，所以目的地不可以写/home/mep/xml,要写xml的上层目录即/home/mep
