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Command to check the open ports in Linux Server

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  • Command to check the open ports in Linux Server

    We can use the following command to check the open ports in the Linux server but make sure that nmap module is installed on the server and if its not installed than first install nmap module by using the command "yum install nmap -y"

    nmap -sT -O localhost

    The above command will show you the following result.

    Code:
    [[email protected]~]# nmap -sT -O localhost
    
    Starting Nmap 5.51 ( http://nmap.org ) at 2013-06-29 12:28 BST
    Nmap scan report for localhost (127.0.0.1)
    Host is up (0.000034s latency).
    rDNS record for 127.0.0.1: localhost.localdomain
    Not shown: 984 closed ports
    PORT      STATE SERVICE
    21/tcp    open  ftp
    22/tcp    open  ssh
    25/tcp    open  smtp
    53/tcp    open  domain
    80/tcp    open  http
    106/tcp   open  pop3pw
    110/tcp   open  pop3
    143/tcp   open  imap
    443/tcp   open  https
    465/tcp   open  smtps
    993/tcp   open  imaps
    995/tcp   open  pop3s
    3000/tcp  open  ppp
    3306/tcp  open  mysql
    8443/tcp  open  https-alt
    10001/tcp open  scp-config
    Regards,
    George S
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