iftop is a free software command-line system monitor tool that produces a frequently updated list of network connections

Step1. Install the epel repository

yum install epel-release

Step2. Install the packages

yum  -y install libpcap libpcap-devel ncurses ncurses-devel

Step3. Install the iftop

yum install iftop

Step4. Run command

iftop

Step5. Monitor the network

iftop -i eth1

Step6. Disable the hostname

iftop -n  eth1

Step7. Turn on port display

iftop -P eth1

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