Linux故障排除 - 在CentOS 7/8和Rhel 7/8中找不到NetStat命令
时间：2020-03-21 11:46:08 来源:igfitidea点击:
正如我们所知，NetStat(网络统计信息)是可用于检查网络配置和活动的命令行工具。
Netcat命令不可用RHEL 8,7的最小安装，如CentOS 8和7.
这篇简短的教程描述了如何获取在CentOS 7中工作的NetStat命令，Rhel 7系统。
重要说明：
许多旧的Linux网络命令已被弃用，支持他们的IPROUTE2对应物。
特别是NetStat已被默认提供的"SS"命令替换。
如果我们仍然有任何原因使用NetStat，则此提示可能会有所帮助。
在CentOS 7/8和Rhel 7/8中 netstat command not found
首先，我们将看到如何在CentOS 8和Rhel 8 Server Edition中修复此错误。
修复 netstat command not found 错误
首先，我们需要使用以下命令查找哪个程序包提供"netstat"命令：
# dnf provides */netstat
或者，
# dnf whatprovides */netstat
我的CentOS 8服务器的示例输出：
net-tools-2.0-0.51.20150912git.el8.x86_64 : Basic networking tools Repo : BaseOS Matched from: Filename : /usr/bin/netstat
如我们所见，"Net-Tools"包提供"netstat"命令。
因此，让我们使用以下命令作为root用户将Net-Tools软件包安装为root用户：
# dnf install net-tools
示例输出：
CentOS-8 - AppStream 1.5 kB/s | 4.3 kB 00:02 CentOS-8 - Base 4.5 kB/s | 3.8 kB 00:00 CentOS-8 - Extras 1.7 kB/s | 1.5 kB 00:00 Dependencies resolved. ========================================================================================================================================================================== Package Architecture Version Repository Size ========================================================================================================================================================================== Installing: net-tools x86_64 2.0-0.51.20150912git.el8 BaseOS 323 k Transaction Summary ========================================================================================================================================================================== Install 1 Package Total download size: 323 k Installed size: 1.0 M Is this ok [y/N]: y Downloading Packages: net-tools-2.0-0.51.20150912git.el8.x86_64.rpm 253 kB/s | 323 kB 00:01 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Total 170 kB/s | 323 kB 00:01 Running transaction check Transaction check succeeded. Running transaction test Transaction test succeeded. Running transaction Preparing : 1/1 Installing : net-tools-2.0-0.51.20150912git.el8.x86_64 1/1 Running scriptlet: net-tools-2.0-0.51.20150912git.el8.x86_64 1/1 Verifying : net-tools-2.0-0.51.20150912git.el8.x86_64 1/1 Installed: net-tools-2.0-0.51.20150912git.el8.x86_64 Complete!
现在，我们可以在CentOS 8系统上使用NetStat命令。
修复"NetStat命令未找到"在CentOS中的错误7& Rhel 7
首先，我们应该了解哪个包提供'netstat'命令。
要了解这一点，请运行：
$yum provides */netstat
或者，
$yum whatprovides */netstat
示例输出：
yum provides */netstat Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.nbrc.ac.in * extras: mirror.nbrc.ac.in * updates: mirror.nbrc.ac.in net-tools-2.0-0.17.20131004git.el7.x86_64 : Basic networking tools Repo : base Matched from: Filename : /bin/netstat
如上所述，我们需要安装Net-Tools包以获取NetStat命令。
因此，让我们使用终端的以下命令安装Net-Tools命令：
$sudo yum install net-tools
示例输出：
Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.nbrc.ac.in * extras: mirror.nbrc.ac.in * updates: mirror.nbrc.ac.in Resolving Dependencies --> Running transaction check ---> Package net-tools.x86_64 0:2.0-0.17.20131004git.el7 will be installed --> Finished Dependency Resolution Dependencies Resolved ======================================================================================================================================================================== Package Arch Version Repository Size ======================================================================================================================================================================== Installing: net-tools x86_64 2.0-0.17.20131004git.el7 base 304 k Transaction Summary ======================================================================================================================================================================== Install 1 Package Total download size: 304 k Installed size: 917 k Is this ok [y/d/N]: y Downloading packages: net-tools-2.0-0.17.20131004git.el7.x86_64.rpm | 304 kB 00:00:05 Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : net-tools-2.0-0.17.20131004git.el7.x86_64 1/1 Verifying : net-tools-2.0-0.17.20131004git.el7.x86_64 1/1 Installed: net-tools.x86_64 0:2.0-0.17.20131004git.el7 Complete!
现在，我们可以使用'netstat'命令。
$netstat
示例输出：
Active Internet connections (w/o servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 server.theitroad.com:ssh sk:54534 ESTABLISHED Active UNIX domain sockets (w/o servers) Proto RefCnt Flags Type State I-Node Path unix 2 [ ] DGRAM 10304 /run/systemd/shutdownd unix 2 [ ] DGRAM 10242 @/org/freedesktop/systemd1/notify unix 5 [ ] DGRAM 6104 /run/systemd/journal/socket unix 13 [ ] DGRAM 6106 /dev/log unix 3 [ ] STREAM CONNECTED 14013 /var/run/dbus/system_bus_socket unix 2 [ ] DGRAM 24798 unix 3 [ ] STREAM CONNECTED 17856 unix 3 [ ] STREAM CONNECTED 17874 unix 3 [ ] STREAM CONNECTED 15064 [...] unix 3 [ ] STREAM CONNECTED 17878 unix 3 [ ] STREAM CONNECTED 17832 unix 3 [ ] STREAM CONNECTED 17841 unix 3 [ ] STREAM CONNECTED 14010 /var/run/dbus/system_bus_socket unix 3 [ ] STREAM CONNECTED 14710 /var/run/dbus/system_bus_socket unix 2 [ ] DGRAM 11594 unix 3 [ ] STREAM CONNECTED 16500 /run/systemd/journal/stdout unix 3 [ ] STREAM CONNECTED 17809 unix 3 [ ] STREAM CONNECTED 17836 unix 2 [ ] DGRAM 13906 unix 3 [ ] STREAM CONNECTED 17845
