ethtool -p 确认网卡

Linux下经常会遇到这种场景，服务器上多个网卡，我网线连接的是哪一个，对应的ifcfg-ens*配置文件是否正确？很多人不清楚如何处理
1.拔网线
2.ethtool -p eth0/ens0等，右侧网卡等闪烁，的就是对用的配置文件和网卡。

ethtool version 4.15
Usage:
        ethtool DEVNAME Display standard information about device
        ethtool -s|--change DEVNAME     Change generic options
                [ speed %d ]
                [ duplex half|full ]
                [ port tp|aui|bnc|mii|fibre ]
                [ mdix auto|on|off ]
                [ autoneg on|off ]
                [ advertise %x ]
                [ phyad %d ]
                [ xcvr internal|external ]
                [ wol p|u|m|b|a|g|s|d... ]
                [ sopass %x:%x:%x:%x:%x:%x ]
                [ msglvl %d | msglvl type on|off ... ]
        ethtool -a|--show-pause DEVNAME Show pause options
        ethtool -A|--pause DEVNAME      Set pause options
                [ autoneg on|off ]
                [ rx on|off ]
                [ tx on|off ]
        ethtool -c|--show-coalesce DEVNAME      Show coalesce options
        ethtool -C|--coalesce DEVNAME   Set coalesce options
                [adaptive-rx on|off]
                [adaptive-tx on|off]
                [rx-usecs N]
                [rx-frames N]
                [rx-usecs-irq N]
                [rx-frames-irq N]
                [tx-usecs N]
                [tx-frames N]
                [tx-usecs-irq N]
                [tx-frames-irq N]
                [stats-block-usecs N]
                [pkt-rate-low N]
                [rx-usecs-low N]
                [rx-frames-low N]
                [tx-usecs-low N]
                [tx-frames-low N]
                [pkt-rate-high N]
                [rx-usecs-high N]
                [rx-frames-high N]
                [tx-usecs-high N]
                [tx-frames-high N]
                [sample-interval N]
        ethtool -g|--show-ring DEVNAME  Query RX/TX ring parameters
        ethtool -G|--set-ring DEVNAME   Set RX/TX ring parameters
                [ rx N ]
                [ rx-mini N ]
                [ rx-jumbo N ]
                [ tx N ]
        ethtool -k|--show-features|--show-offload DEVNAME       Get state of protocol offload and other features
        ethtool -K|--features|--offload DEVNAME Set protocol offload and other features
                FEATURE on|off ...
        ethtool -i|--driver DEVNAME     Show driver information
        ethtool -d|--register-dump DEVNAME      Do a register dump
                [ raw on|off ]
                [ file FILENAME ]
        ethtool -e|--eeprom-dump DEVNAME        Do a EEPROM dump
                [ raw on|off ]
                [ offset N ]
                [ length N ]
        ethtool -E|--change-eeprom DEVNAME      Change bytes in device EEPROM
                [ magic N ]
                [ offset N ]
                [ length N ]
                [ value N ]
        ethtool -r|--negotiate DEVNAME  Restart N-WAY negotiation
        ethtool -p|--identify DEVNAME   Show visible port identification (e.g. blinking)
               [ TIME-IN-SECONDS ]
        ethtool -t|--test DEVNAME       Execute adapter self test
               [ online | offline | external_lb ]
        ethtool -S|--statistics DEVNAME Show adapter statistics
        ethtool --phy-statistics DEVNAME        Show phy statistics
        ethtool -n|-u|--show-nfc|--show-ntuple DEVNAME  Show Rx network flow classification options or rules
                [ rx-flow-hash tcp4|udp4|ah4|esp4|sctp4|tcp6|udp6|ah6|esp6|sctp6 |
                  rule %d ]
        ethtool -N|-U|--config-nfc|--config-ntuple DEVNAME      Configure Rx network flow classification options or rules
                rx-flow-hash tcp4|udp4|ah4|esp4|sctp4|tcp6|udp6|ah6|esp6|sctp6 m|v|t|s|d|f|n|r... |
                flow-type ether|ip4|tcp4|udp4|sctp4|ah4|esp4|ip6|tcp6|udp6|ah6|esp6|sctp6
                        [ src %x:%x:%x:%x:%x:%x [m %x:%x:%x:%x:%x:%x] ]
                        [ dst %x:%x:%x:%x:%x:%x [m %x:%x:%x:%x:%x:%x] ]
                        [ proto %d [m %x] ]
                        [ src-ip IP-ADDRESS [m IP-ADDRESS] ]
                        [ dst-ip IP-ADDRESS [m IP-ADDRESS] ]
                        [ tos %d [m %x] ]
                        [ tclass %d [m %x] ]
                        [ l4proto %d [m %x] ]
                        [ src-port %d [m %x] ]
                        [ dst-port %d [m %x] ]
                        [ spi %d [m %x] ]
                        [ vlan-etype %x [m %x] ]
                        [ vlan %x [m %x] ]
                        [ user-def %x [m %x] ]
                        [ dst-mac %x:%x:%x:%x:%x:%x [m %x:%x:%x:%x:%x:%x] ]
                        [ action %d ]
                        [ loc %d]] |
                delete %d
        ethtool -T|--show-time-stamping DEVNAME Show time stamping capabilities
        ethtool -x|--show-rxfh-indir|--show-rxfh DEVNAME        Show Rx flow hash indirection table and/or RSS hash key
        ethtool -X|--set-rxfh-indir|--rxfh DEVNAME      Set Rx flow hash indirection table and/or RSS hash key
                [ equal N | weight W0 W1 ... | default ]
                [ hkey %x:%x:%x:%x:%x:.... ]
                [ hfunc FUNC ]
        ethtool -f|--flash DEVNAME      Flash firmware image from the specified file to a region on the device
               FILENAME [ REGION-NUMBER-TO-FLASH ]
        ethtool -P|--show-permaddr DEVNAME      Show permanent hardware address
        ethtool -w|--get-dump DEVNAME   Get dump flag, data
                [ data FILENAME ]
        ethtool -W|--set-dump DEVNAME   Set dump flag of the device
                N
        ethtool -l|--show-channels DEVNAME      Query Channels
        ethtool -L|--set-channels DEVNAME       Set Channels
               [ rx N ]
               [ tx N ]
               [ other N ]
               [ combined N ]
        ethtool --show-priv-flags DEVNAME       Query private flags
        ethtool --set-priv-flags DEVNAME        Set private flags
                FLAG on|off ...
        ethtool -m|--dump-module-eeprom|--module-info DEVNAME   Query/Decode Module EEPROM information and optical diagnostics if available
                [ raw on|off ]
                [ hex on|off ]
                [ offset N ]
                [ length N ]
        ethtool --show-eee DEVNAME      Show EEE settings
        ethtool --set-eee DEVNAME       Set EEE settings
                [ eee on|off ]
                [ advertise %x ]
                [ tx-lpi on|off ]
                [ tx-timer %d ]
        ethtool --set-phy-tunable DEVNAME       Set PHY tunable
                [ downshift on|off [count N] ]
        ethtool --get-phy-tunable DEVNAME       Get PHY tunable
                [ downshift ]
        ethtool --reset DEVNAME Reset components
                [ flags %x ]
                [ mgmt ]
                [ mgmt-shared ]
                [ irq ]
                [ irq-shared ]
                [ dma ]
                [ dma-shared ]
                [ filter ]
                [ filter-shared ]
                [ offload ]
                [ offload-shared ]
                [ mac ]
                [ mac-shared ]
                [ phy ]
                [ phy-shared ]
                [ ram ]
                [ ram-shared ]
                [ ap ]
                [ ap-shared ]
                [ dedicated ]
                [ all ]
        ethtool --show-fec DEVNAME      Show FEC settings
        ethtool --set-fec DEVNAME       Set FEC settings
                [ encoding auto|off|rs|baser ]
        ethtool -h|--help               Show this help
        ethtool --version               Show version number