Linux Command - ifstat

ifstat - Report InterFace STATistics

 

Ifstat is a little tool to report interface activity, just like iostat/vmstat do for other system statistics.

 

SYNOPSIS

       ifstat [-a] [-l] [-z] [-n] [-v] [-h] [-t] [-i if0,if1,...] [-d drv[:opt]] [-s [comm@][#]host[/nn]] [-T] [-A] [-w] [-W] [-S] [-b] [-q]

       [delay[/delay] [count]]

 

 

OPTIONS

       -l  Enables monitoring of loopback interfaces for which statistics are available. By default, ifstat monitors all non-loopback interfaces

           that are up.

       -l 确保监控有返回数据的接口其数据统计适能。 默认情况，ifstat 监控所有没有返回的接口。 

Example：

root@localhost:/tmp> ifconfig
eth0            Link encap:Ethernet    HWaddr 00:1E:8C:50:64:B9    
                    inet addr:172.16.0.2    Bcast:172.16.0.255    Mask:255.255.255.0
                    inet6 addr: fe80::21e:8cff:fe50:64b9/64 Scope:Link
                    UP BROADCAST RUNNING MULTICAST    MTU:1500    Metric:1
                    RX packets:7813059 errors:0 dropped:0 overruns:0 frame:0
                    TX packets:6213047 errors:0 dropped:0 overruns:0 carrier:2
                    collisions:0 txqueuelen:1000
                    RX bytes:2849810777 (2.6 GiB)    TX bytes:2700161629 (2.5 GiB)
                    Memory:fbfc0000-fc000000

eth0:1        Link encap:Ethernet    HWaddr 00:1E:8C:50:64:B9    
                    inet addr:10.0.0.1    Bcast:128.224.255.255    Mask:255.255.0.0
                    UP BROADCAST RUNNING MULTICAST    MTU:1500    Metric:1
                    Memory:fbfc0000-fc000000

lo                Link encap:Local Loopback    
                    inet addr:127.0.0.1    Mask:255.0.0.0
                    inet6 addr: ::1/128 Scope:Host
                    UP LOOPBACK RUNNING    MTU:16436    Metric:1
                    RX packets:7175 errors:0 dropped:0 overruns:0 frame:0
                    TX packets:7175 errors:0 dropped:0 overruns:0 carrier:0
                    collisions:0 txqueuelen:0
                    RX bytes:208533 (203.6 KiB)    TX bytes:208533 (203.6 KiB)

root@localhost:/tmp> ifstat -l
                lo                                 eth0            
KB/s in    KB/s out     KB/s in    KB/s out
        0.00            0.00            0.39            0.19
        0.00            0.00            0.45            0.14
        0.00            0.00            0.70            0.14
.....

 

       -a  Enables monitoring of all interfaces found for which statistics are available.

       -a  确保监控所有的接口都已经找到其数据统计功能适能。

Example: 

root@localhost:/tmp> ifstat -a
                lo                                 eth0                             wlan0            
KB/s in    KB/s out     KB/s in    KB/s out     KB/s in    KB/s out
        0.00            0.00            1.08            0.22            0.00            0.00
        0.00            0.00            0.71            0.16            0.00            0.00
        0.00            0.00            0.24            0.16            0.00            0.00
        0.00            0.00            0.53            0.16            0.00            0.00
        0.00            0.00            1.16            0.16            0.00            0.00
        0.00            0.00            0.36            0.16            0.00            0.00
        0.00            0.00            0.64            0.16            0.00            0.00

 

       -z  Hides interface which counters are null, eg interfaces that are up but not used.
       -z 屏蔽计数器内数据为空的接口。 
例如，一个接口已经适能但没有数据进/出通过这个接口。
Example:

root@localhost:/tmp> ifstat -z
             eth0            
KB/s in    KB/s out
        1.46            0.14
        0.24            0.13
        1.13            0.13
        0.69            0.13
        1.00            0.13
        0.36            0.19

 

       -i  Specifies the list of interfaces to monitor, separated by commas (if an interface name has a comma, it can be escaped with '\'). Mul�\

           tiple instances of the options are added together.

 

       -s  Equivalent to -d snmp:[comm@][#]host[/nn]] to poll a remote host through SNMP. See below for details.

 

       -h  Displays a short help message.

 

       -n  Turns off displaying the header periodically.

 

       -t  Adds a timestamp at the beginning of each line.

 

       -T  Reports total bandwith for all monitored interfaces.

 

       -A  Disables use of interface indexes: by default, when polling mechanism is index based (snmp, ifmib), ifstat remembers indexes of moni�\

           tored interfaces to poll only them. However, if interfaces indexes change often (new interfaces added, etc), you might loose some

           stats, hence this flag. Note that if you ask ifstat to monitor a non existent interface, it will poll all interfaces until it finds

           the requested one (regardless of this flag) so you can poll for an interface that goes up and down.

 

       -w  Uses fixed width columns, instead of enlarging them if needed for interfaces names to fit.

 

       -W  Wrap lines that are larger than the terminal width (implies -w). Wrapped lines are prefixed with a cycling letter to ease reading.

 

       -S  Keep stats updated on the same line if possible (no scrolling nor wrapping).

 

       -b  Reports bandwith in kbits/sec instead of kbytes/sec.

 

       -q  Quiet mode, warnings are not printed.

 

       -v  Displays version and the compiled-in drivers.