Sar -y

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      -y     Report TTY devices activity. The following values are
             displayed:
             rcvin/s
                    Number of receive interrupts per second for current
                    serial line.  Serial line number is given in the
                    TTY column.
             xmtin/s
                    Number of transmit interrupts per second for
                    current serial line.
             framerr/s
                    Number of frame errors per second for current
                    serial line.
             prtyerr/s
                    Number of parity errors per second for current
                    serial line.
             brk/s  Number of breaks per second for current serial
                    line.
             ovrun/s
                    Number of overrun errors per second for current
                    serial line.



See also[edit]

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