Centos 6 安装nslookup命令

安装步骤

1. 執行 nslookup，系統回應「沒有這個指令」:

   $ nslookup
   -bash: nslookup: command not found
   

2. 直覺地用 yum 安裝 nslookup，結果跟你說「套件不存在」:

   $ yum install nslookup
   Loaded plugins: fastestmirror
   Loading mirror speeds from cached hostfile
    * base: mirrors.kernel.org
    * elrepo: ftp.osuosl.org
    * epel: mirrors.kernel.org
    * extras: mirrors.kernel.org
    * rpmforge: mirror.hmc.edu
    * updates: mirrors.kernel.org
   Setting up Install Process
   No package nslookup available.
   Error: Nothing to do
   

3. 我們可以加 provides 參數查詢 nslookup 存在哪個套件中:

   $ yum provides nslookup
   Loaded plugins: fastestmirror
   Loading mirror speeds from cached hostfile
   * base: mirrors.linode.com
   * epel: mirror.prgmr.com
   * extras: mirrors.linode.com
   * rpmforge: mirror.hmc.edu
   * updates: mirrors.linode.com
   Warning: 3.0.x versions of yum would erroneously match against filenames.
   You can use "*/nslookup" and/or "*bin/nslookup" to get that behaviour
   No Matches found
   

4. 雖然第一時間也是查不到，不過在上面遺留的訊息中， yum 有進一步顯示說檔案可能藏在 bin 目錄中。我們依樣畫葫蘆:

   $ yum provides *bin/nslookup
   Loaded plugins: fastestmirror
   Loading mirror speeds from cached hostfile
   * base: mirrors.linode.com
   * epel: mirror.prgmr.com
   * extras: mirrors.linode.com
   * rpmforge: mirror.hmc.edu
   * updates: mirrors.linode.com
   32:bind-utils-9.8.2-0.17.rc1.el6_4.6.x86_64 : Utilities for querying DNS name
                                               : servers
   Repo        : base
   Matched from:
   Filename    : /usr/bin/nslookup
   

5. 事不宜遲，咱們快點安裝吧:

   $ yum install bind-utils
   

   PS. 連帶的 dig 與 host 也存在於 bind-utils 套件裡

转自：
http://www.vixual.net/blog/archives/47