1、which
which - shows the full path of (shell) commands.
which [option]
2、whereis
whereis - locate the binary, source, and manual page files for a command
whereis [option] filename
3、find
find - search for files in a directory hierarchy
find [option] [path] expression
-mtime n File's data was last modified n*24 hours ago.
-atime
-ctime
常用 find path expression如
find / -name me.test
参考
【1】 http://blog.163.com/zhoumhan_0351/blog/static/399542272010532241364/