Oracle DBA Basics - 1 || Verify Port is opened or Listening in Linux Server (nmap, telnet, netstat)

oel5node1 - 192.168.1.128
oel6node1 - 192.168.1.138
=========================
nmap:
=====
nmap -p 22 -Pn 192.168.1.128
nmap -p 21 -Pn 192.168.1.128

telnet:
=======
telnet 192.168.1.128 22
telnet 192.168.1.128 21

netstat:
========
netstat -an | grep LISTEN | grep 1521
netstat -anp |grep 1521

netstat -an | grep LISTEN | grep 22
netstat -anp |grep 22

#port #nmap #netstat #telnet #PostStatus

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