This post is older than a year. Consider some information might not be accurate anymore.
Doing some Oracle DB Installation on CentOS, netstat is an essential tool for checking ports. On the minimal installation it is not installed. Check out how to install it.
This approach failed:
# yum install netstat
yum provides the command whatprovides, and it will give you the package name.
[root@localhost logs]# yum whatprovides netstat
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: centos.bio.lmu.de
* epel: epel.besthosting.ua
* extras: artfiles.org
* updates: centos.copahost.com
net-tools-2.0-0.17.20131004git.el7.x86_64 : Basic networking tools
Repo : base
Matched from:
Filename : /bin/netstat
Install it:
# yum install net-tools
After that you use it:
[root@localhost logs]# netstat -na | grep 1521
tcp6 0 0 :::1521 :::* LISTEN
tcp6 0 0 ::1:1521 ::1:50024 ESTABLISHED
tcp6 0 0 ::1:50024 ::1:1521 ESTABLISHED
unix 2 [ ACC ] STREAM LISTENING 65658 /var/tmp/.oracle/sEXTPROC1521
