linux命令之创建符号连接-ln-CFANZ编程社区

由于linux编译出的so经常会在后面带有版本号，而程序加载的是不带版本号的so，导致经常出现so找不的情况，这个时候为带版本号的so创建一个符号链接（软链接）就好了。

在终端输入ln --help查看一下这个命令的用法如下：

用法：ln [选项]... [-T] 目标 链接名 (第一种格式)
　或：ln [选项]... 目标    (第二种格式)
　或：ln [选项]... 目标... 目录  (第三种格式)
　或：ln [选项]... -t 目录 目标... (第四种格式)
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.
By default, each destination (name of new link) should not already exist.
When creating hard links, each TARGET must exist.  Symbolic links
can hold arbitrary text; if later resolved, a relative link is
interpreted in relation to its parent directory.

必选参数对长短选项同时适用。
      --backup[=CONTROL]  为每个已存在的目标文件创建备份文件
  -b        类似--backup，但不接受任何参数
  -d, -F, --directory   创建指向目录的硬链接(只适用于超级用户)
  -f, --force     强行删除任何已存在的目标文件
  -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    显示此帮助信息并退出
      --version   显示版本信息并退出

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       不进行备份(即使使用了--backup 选项)
  numbered, t     备份文件加上数字进行排序
  existing, nil   若有数字的备份文件已经存在则使用数字，否则使用普通方式备份
  simple, never   永远使用普通方式备份

Using -s ignores -L and -P.  Otherwise, the last option specified controls
behavior when a TARGET is a symbolic link, defaulting to -P.

GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
请向<http://translationproject.org/team/zh_CN.html> 报告ln 的翻译错误
Full documentation at: <http://www.gnu.org/software/coreutils/ln>
or available locally via: info '(coreutils) ln invocation'