实例：ln -s /home/gamestat    /gamestat

linux下的软链接类似于windows下的快捷方式

ln -s a b 中的 a 就是源文件，b是链接文件名,其作用是当进入b目录，实际上是链接进入了a目录

如上面的示例，当我们执行命令   cd /gamestat/的时候  实际上是进入了 /home/gamestat/

值得注意的是执行命令的时候,应该是a目录已经建立，目录b没有建立。我最开始操作的是也把b目录给建立了，结果就不对了

删除软链接：

   rm -rf  b  注意不是rm -rf  b/

ln  a b 是建立硬链接

建立链接的使用方法如下：

[root@WEB_YQ_64_79 /]# 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)

In the 1st form, create a link to TARGET with the name LINK_NAME.

In the 2nd form, create a link to TARGET in the current directory.

In the 3rd and 4th forms, create links to each TARGET in DIRECTORY.

Create hard links by default, symbolic links with --symbolic.

When creating hard links, each TARGET must exist.

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

  -n, --no-dereference        treat destination that is a symlink to a

                                directory as if it were a normal file

  -i, --interactive           prompt whether to remove destinations

  -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

  -v, --verbose               print name of each file before linking

      --help     display this help and exit

      --version  output version information and exit

The backup suffix is `~‘, unless set with --suffix or SIMPLE_BACKUP_SUFFIX.

The version control method may be selected via the --backup option or through

the VERSION_CONTROL environment variable.  Here are the values:

  none, off       never make backups (even if --backup is given)

  numbered, t     make numbered backups

  existing, nil   numbered if numbered backups exist, simple otherwise

  simple, never   always make simple backups

Report bugs to <bug-coreutils@gnu.org>.

转自：http://biyutong.iteye.com/blog/1445699