为了达到这一目的，需要对系统默认路径进行一些简单的设置。在 Stata 的安装路径下（如：【D:\stata15】）新建一个 profile.do 文件，将如下命令放到此文件中：
adopath + "D:\stata15\ado\plus" sysdir set PLUS "D:\stata15\ado\plus"// 外部命令的存放位置 sysdir set PERSONAL "D:\stata15\ado\personal"// 个人文件夹位置 cd `c(sysdir_personal)'
. ado dir //显示已安装ado文件 [1] package outreg2 from http://fmwww.bc.edu/repec/bocode/o 'OUTREG2': module to arrange regression outputs into an illustrative table [2] package estout from http://fmwww.bc.edu/repec/bocode/e 'ESTOUT': module to make regression tables
. ssc install winsor2, all replace //安装winsor2，基本用法：ssc install newprogramname checking winsor2 consistency and verifying not already installed... installing into D:\stata15\ado\plus\... installation complete.
若要查看某一具体命令是否安装，可以利用
. ado, find(winsor2)
[3] package winsor2 from http://fmwww.bc.edu/repec/bocode/w 'WINSOR2': module to winsorize data
要查看 ssc 上最热门的命令，可以通过
. ssc hot, n(10) //显示排名前10的命令 Top 10 packages at SSC Aug 2018 Rank # hits Package Author(s) ---------------------------------------------------------------------- 1331271.0 findname Nicholas J. Cox 219504.6 outreg2 Roy Wada 318223.6 estout Ben Jann 411066.7 distinct Gary Longton, Nicholas J. Cox 57746.3 winsor Nicholas J. Cox 66881.7 winsor2 Lian Yu-jun 76598.7 ivreg2 Mark E Schaffer, Steven Stillman, Christopher F Baum 86579.3 ivreg210 Mark E Schaffer, Steven Stillman, Christopher F Baum 96571.1 ivreg28 Mark E Schaffer, Steven Stillman, Christopher F Baum 106561.8 ivreg29 Christopher F Baum, Mark E Schaffer, Steven Stillman ---------------------------------------------------------------------- (Click on package name for description)
从上面结果可以看出，连老师编写的 winsor2 也榜上有名 (^^此处应有掌声)。另外，还有 ssc new , ssc describe , ssc type 和 ssc copy 等用法，具体可以通过 help ssc 查看相关例子。
2.2 search 命令
与 ssc命令相比，search 搜索的范围更广，该命令语法如下：
.searchword[word ...][, search_options]
word 表示待搜索的关键词，比如想了解面板数据模型的相关命令，可以 search panel data model。对于怎么取关键词，可以 help searchadvice。可以看出，搜索结果中既有 Stata 手册中的命令，也有外部命令，甚至还包括 Stata 官方的培训、书籍、视频和 FAQ 等信息。
(1) search + all: 通常为默认选项，根据帮助文件的描述： search, all is the best way to search for information on a topic across all sources, including the system help, the FAQs at the Stata website, the Stata Journal,and all Stata-related Internet sources including user-written additions
从上面的表述可以发现，当定义 all 时，其搜索范围很广，包括软件自带的系统文件，Stata 网站的常见问题集，Stata journal 期刊及其他网络相关资料。因此，与 ssc 不同，search 命令不仅可以搜索外部命令，也能搜索其他相关文档资料。
(2) search + net: 与 net search 等价，根据帮助文件描述：
net search searches the Internet for user-written additions to Stata, including, but not limited to, user-written additions published in the Stata Journal (SJ) and in the Stata Technical Bulletin (STB)
. search linear regression, all . search linear regression, net . search linear regression, sj . search linear regression, faq . search linear regression, manual
2.3 net 命令
net 命令的用法与 search 相似，功能也较多，详细可以 help net 查看。本文主要介绍以下几种：
(1) net search word [word …] [, search_options] 该命令与上面介绍的 search + net 等价； (2) net install 语法如下：
. net install pkgname [, all replaceforcefrom(directory_or_url)]
. net install github, from("https://haghish.github.io/github/") checking github consistency and verifying not already installed... installing into D:\stata15\ado\plus\... installation complete.
使用 ado describe 命令可以查看已安装命令详情：
. ado describe github
-------------------------------------------------------- [4] package github from https://haghish.github.io/github --------------------------------------------------------
TITLE 'GITHUB': search, install, anduninstall Stata packages with a particular {break}
DESCRIPTION/AUTHOR(S) version (release) as well as their dependencies from {browse "http://www.github.com/haghish/github":GitHub} website Distribution-Date: 20161214 INSTALLATION FILES f\findall.ado f\findall.sthlp g\github.ado g\github.dlg g\github.sthlp g\githubcheck.ado g\githubconfirm.ado g\githubdependency.ado g\githublist.ado g\githubmake.ado g\githuboutput.ado g\githubquery.ado g\githubsearch.ado g\githubsearchsteps.ado m\make.ado m\make.dlg
INSTALLED ON 1 Nov 2018 --------------------------------------------------------
(3) net sj vol-issue [insert] 这个用法很强大，有时候我们想把 Stata Journal 某一期所涉及的外部命令都下载到本地，比如想安装 2018年第 3 期文中的所有文件，可以使用如下命令：
. net sj 18-3
这等价于
. net from"http://www.stata-journal.com/software/sj18-3"
2.4 findit 命令
findit + keyword 等价于 search keyword [keyword ...], all
可以搜索的资料包括： 系统文件 the system help, the FAQs, the Stata Journal, and all Stata-related Internet sources including user-written additions. 如我们想了解 Stata 中有关面板单位根检验方面命令与资料，可以执行如下命令：
. findit panel unit root Stata 中的 findit 命令-Stata连享会