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Netstat

Netstat is a utility for gathering network statistics. It comes preinstalled on most systems.

If missing, here’s how to install.

# Redhat, CentOS
yum install net-tools
# Debian, Ubuntu, Mint
apt install net-tools
# SLES, SUSE
zypper install net-tools

Here are some common and useful commands.

# show version
netstat -v
# show routing table
netstat -nr
# show network interface statistics
netstat -ai
# show network connections
netstat -ant
# show network services
netstat -tulpn

Which Java Version

Here’s a quick way how to find which Java version you are running.

which java
java -version

Get Apache Version

To find out what version of Apache running on your server, type the following.

Ubuntu-based distros

apache2 -V

Debian-based distros

apachectl -V

Redhat-based distros

httpd -V