Linux解决 -bash: nc: command not found问题

1 问题

[root@cm ~]# nc -l 9000
 
-bash: nc: command not found

  提示： 无法使用这个nc命令。因为没有配置这个命令。 

2 解决办法

输入命令： 

[root@hadoop1 ~]# yum install -y nc

运行结果：

[root@cm ~]# yum install -y nc
 
Loaded plugins: fastestmirror
 
Loading mirror speeds from cached hostfile
 
* base: mirrors.163.com
 
* extras: centos.ustc.edu.cn
 
* updates: centos.ustc.edu.cn
 
Resolving Dependencies
 
--> Running transaction check
 
---> Package nmap-ncat.x86_64 2:6.40-16.el7 will be installed
 
--> Processing Dependency: libpcap.so.1()(64bit) for package: 2:nmap-ncat-6.40-16.el7.x86_64
 
--> Running transaction check
 
---> Package libpcap.x86_64 14:1.5.3-11.el7 will be installed
 
--> Finished Dependency Resolution
 
 
Dependencies Resolved
 
 
===================================================================================================================================
 
Package Arch Version Repository Size
 
===================================================================================================================================
 
Installing:
 
nmap-ncat x86_64 2:6.40-16.el7 base 206 k
 
Installing for dependencies:
 
libpcap x86_64 14:1.5.3-11.el7 base 138 k
 
 
Transaction Summary
 
===================================================================================================================================
 
Install 1 Package (+1 Dependent package)
 
 
Total download size: 344 k
 
Installed size: 740 k
 
Downloading packages:
 
warning: /var/cache/yum/x86_64/7/base/packages/nmap-ncat-6.40-16.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
 
Public key for nmap-ncat-6.40-16.el7.x86_64.rpm is not installed
 
(1/2): nmap-ncat-6.40-16.el7.x86_64.rpm | 206 kB 00:00:00
 
(2/2): libpcap-1.5.3-11.el7.x86_64.rpm | 138 kB 00:00:00
 
-----------------------------------------------------------------------------------------------------------------------------------
 
Total 517 kB/s | 344 kB 00:00:00
 
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
 
Importing GPG key 0xF4A80EB5:
 
Userid : "CentOS-7 Key (CentOS 7 Official Signing Key) <security@centos.org>"
 
Fingerprint: 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5
 
Package : centos-release-7-4.1708.el7.centos.x86_64 (@anaconda)
 
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
 
Running transaction check
 
Running transaction test
 
Transaction test succeeded
 
Running transaction
 
Installing : 14:libpcap-1.5.3-11.el7.x86_64 1/2
 
Installing : 2:nmap-ncat-6.40-16.el7.x86_64 2/2
 
Verifying : 14:libpcap-1.5.3-11.el7.x86_64 1/2
 
Verifying : 2:nmap-ncat-6.40-16.el7.x86_64 2/2
 
 
Installed:
 
nmap-ncat.x86_64 2:6.40-16.el7
 
 
Dependency Installed:
 
libpcap.x86_64 14:1.5.3-11.el7
 
 
Complete!