在Linux下獲取幫助

在Linux下獲取幫助   man   www.2cto.com   man [選項] [命令名稱] man目錄：[root@node203 /]# ls /usr/share/man man init man -k  keyword man -f  keyword man -a  keyword man  -n  keyword   //不存在的參數，直接顯示man的參數 Help 可以用來查找Shell命令的用法 ll --help   info info mknod whereis 查找命令所在的位置 whereis ls OPTIONS        -b     Search only for binaries.只查找二進制文件        -m     Search only for manual sections.  //查找主要文件        -s     Search only for sources.//查找來源        -u     Search  for unusual entries.  A file is said to be unusual if it               does  not  have  one  entry  of  each  requested   type.    Thus               ‘whereis  -m  -u  *’  asks for those files in the current direc-               tory which have no documentation. //查找不常用的記錄文件        -B     Change or otherwise limit the places where whereis searches  for               binaries.        -M     Change  or otherwise limit the places where whereis searches for               manual sections.        -S     Change or otherwise limit the places where whereis searches  for               sources.        -f     Terminate  the last directory list and signals the start of file               names, and must be used when any of the -B, -M,  or  -S  options               are used.