Linux netstat 命令安装

  当服务器未安装 netstat 工具时，查看端口监听状态会提示如下报错 “command not found”。

1. [root@VM_0_15_linux ~]# netstat -an|grep 9200
2. -bash: netstat: command not found

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  如果要使用 netstat 命令，需要先安装工具，安装步骤如下所示。

一、首先配置好本机的 yum 源

1. [root@VM_0_15_linux ~]# yum repolist all
2. Loaded plugins: fastestmirror
3. Loading mirror speeds from cached hostfile
4. repo id repo name status
5. base/1.1/x86_64 UPEL-1.1 - Base enabled: 7,695
6. !extras/1.1/x86_64 UPEL-1.1 - Extras disabled
7. updates/1.1/x86_64 UPEL-1.1 - Updates enabled: 208
8. upel-media UPEL-1.1 - Media disabled
9. repolist: 7,903

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二、查看提供命令的工具包

  执行如下命令 yum provides */netstat 可以看到提供命令的工具包：
net-tools-2.0-0.22.20131004git.el7.x86_64。

1. [root@VM_0_15_linux ~]# yum provides */netstat
2. Loaded plugins: fastestmirror
3. Loading mirror speeds from cached hostfile
4. updates/1.1/x86_64/filelists_db | 1.1 MB 00:00:00
5. ctdb-tests-4.7.1-9.el7_5.x86_64 : CTDB clustered database test suite
6. Repo : base
7. Matched from:
8. Filename : /usr/share/ctdb/tests/eventscripts/stubs/netstat
12. net-tools-2.0-0.22.20131004git.el7.x86_64 : Basic networking tools
13. Repo : base
14. Matched from:
15. Filename : /bin/netstat

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三、安装工具包

  执行 yum install net-tools 安装命令。

1. [root@VM_0_15_linux ~]# yum install net-tools
2. Loaded plugins: fastestmirror
3. Loading mirror speeds from cached hostfile
4. Resolving Dependencies
5. --> Running transaction check
6. ---> Package net-tools.x86_64 0:2.0-0.22.20131004git.el7 will be installed
7. --> Finished Dependency Resolution
9. Dependencies Resolved
11. =======================================================================================================================================================================
12. Package Arch Version Repository Size
13. =======================================================================================================================================================================
14. Installing:
15. net-tools x86_64 2.0-0.22.20131004git.el7 base 305 k
17. Transaction Summary
18. =======================================================================================================================================================================
19. Install 1 Package
21. Total download size: 305 k
22. Installed size: 917 k
23. Is this ok [y/d/N]: y
24. Downloading packages:
25. net-tools-2.0-0.22.20131004git.el7.x86_64.rpm | 305 kB 00:00:00
26. Running transaction check
27. Running transaction test
28. Transaction test succeeded
29. Running transaction
30. Installing : net-tools-2.0-0.22.20131004git.el7.x86_64 1/1
31. [upel]: net-tools signature check ok.
32. [upel]: net-tools signature check ok.
33. [upel]: net-tools signature check ok.
34. Verifying : net-tools-2.0-0.22.20131004git.el7.x86_64 1/1
36. Installed:
37. net-tools.x86_64 0:2.0-0.22.20131004git.el7
39. Complete!

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四、验证测试

  利用本地监听的端口 9200 验证工具安装是否正常。可以正常使用命令，说明安装正常。

1. [root@VM_0_15_linux ~]# netstat -an|grep 9200
2. tcp6 0 0 :::9200 :::* LISTEN

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