yum install libpcap epel-release -y
yum -y install iftop nethogs sysstat
[root@pgdb ~]# sar -n DEV 1
Linux 3.10.0-1062.el7.x86_64 (pgdb) 06/10/2022 _x86_64_ (8 CPU)
01:44:32 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s
01:44:33 PM ens192 1844.00 1200.00 223.75 2042.91 0.00 0.00 0.00
01:44:33 PM lo 6.00 6.00 2.12 2.12 0.00 0.00 0.00
01:44:33 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s
01:44:34 PM ens192 1905.00 1248.00 232.28 2076.88 0.00 0.00 0.00
01:44:34 PM lo 6.00 6.00 2.23 2.23 0.00 0.00 0.00
01:44:34 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s
01:44:35 PM ens192 1849.00 1226.00 225.46 2046.24 0.00 0.00 0.00
01:44:35 PM lo 7.00 7.00 2.32 2.32 0.00 0.00 0.00
01:44:35 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s
01:44:36 PM ens192 1829.00 1202.00 223.50 1989.48 0.00 0.00 0.00
01:44:36 PM lo 6.00 6.00 2.12 2.12 0.00 0.00 0.00
^C
01:44:36 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s
01:44:36 PM ens192 1853.45 1220.69 226.25 2040.04 0.00 0.00 0.00
01:44:36 PM lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s
Average: ens192 1856.33 1219.21 226.25 2039.02 0.00 0.00 0.00
Average: lo 5.46 5.46 1.92 1.92 0.00 0.00 0.00
[root@pgdb ~]# iftop
interface: ens192
IP address is: 192.168.208.40
MAC address is: 00:50:56:ab:3e:35
191Mb 381Mb 572Mb 763Mb 954Mb
+--------------------------+--------------------------+--------------------------+--------------------------+---------------------------
pgdb => 192.168.207.220 13.1Mb 10.2Mb 9.29Mb
<= 1.71Mb 2.11Mb 1.96Mb
pgdb => 10.168.20.66 1.91Kb 2.94Kb 3.02Kb
<= 184b 549b 488b
pgdb => public1.alidns.com 0b 171b 288b
<= 0b 501b 506b
pgdb => 192.168.207.205 0b 130b 109b
<= 0b 198b 165b
pgdb => 10.168.14.186 0b 0b 304b
<= 0b 0b 393b
----------------------------------------------------------------------------------------------------------------------------------------
TX: cum: 13.9MB peak: 17.4Mb rates: 13.1Mb 10.2Mb 9.30Mb
RX: 2.94MB 2.74Mb 1.71Mb 2.12Mb 1.96Mb
[root@pgdb ~]# nethogs
Ethernet link detected
Waiting for first packet to arrive (see sourceforge.net bug 1019381)
NetHogs version 0.8.5
PID USER PROGRAM DEV SENT RECEIVED
14994 root sshd: root@notty ens192 252.144 9424.180 KB/sec
2200 postgr.. postgres: sgdd zddb 192.168.207.205(49935) idle ens192 13.436 3.521 KB/sec
? root unknown TCP 0.000 0.000 KB/sec
TOTAL 265.580 9427.701 KB/sec
相关参考：
- 墨天轮
