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Find per process bandwidth utilization

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urgensherpa
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Ubuntu 22.04.2 LTS (GNU/Linux 5.19.0-1025-aws x86_64)
# cat /proc/2315/net/dev 
Inter-| Receive | Transmit face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed lo: 13477 132 0 0 0 0 0 0 13477 132 0 0 0 0 0 0 eth0: 1013996480 688315 0 0 0 0 0 0 4552419 63545 0 0 0 0 0 0 root@ip-172-31-17-138:/code/bwcalc

# cat /proc/2315/net/dev 
Inter-| Receive | Transmit face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed lo: 13477 132 0 0 0 0 0 0 13477 132 0 0 0 0 0 0 eth0: 1062890636 721060 0 0 0 0 0 0 4794623 67127 0 0 0 0 0 0

2315 is pid of wget downloading a file from external network.

1062890636-1013996480 = 48864156 ~ 48.864156 MBps

Similarly ~242204 Bytes has been send out by eth0 interface