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Need output in mbps (bits)
# ./bytes-second.sh eth0
eth0 interface maximum Speed: 1000Mb/s
RX:12883212 TX:17402002 B/s | RX:98 TX:132 Mb/s
RX:12371647 TX:17830111 B/s | RX:94 TX:136 Mb/s
RX:12502750 TX:17860915 B/s | RX:95 TX:136 Mb/s
Need to query hundreds of hosts with an ssh command ?
Of course you'll have setup keys on all your remote HOSTs. But in the case a key is not present this command will skip that node, proceeding on to the next.
Force pseudo-tty allocation. This can be used to execute arbitrary screen-based programs on a remote machine. Also prevents unwanted stty messages being sent to console
-o "BatchMode yes"
If set to yes, passphrase/password querying will be disabled. This option is useful in scripts and other batch jobs where no user is present