命令拷屏之网络工具

有线与无线网络配置相关工具

network与NetworkManager

initscripts包

net-tools包 net-tools-1.60-110.el6_2.x86_64，已经逐渐被iproute替换

NetworkManager包

iproute包

ethtool-4.8-1.el7.x86_64包

[root@kvm1 network-scripts]# rpm -qa |grep NetworkManager
NetworkManager-bluetooth-1.0.0-14.git20150121.b4ea599c.el7.x86_64
NetworkManager-1.0.0-14.git20150121.b4ea599c.el7.x86_64
NetworkManager-libnm-1.0.0-14.git20150121.b4ea599c.el7.x86_64
NetworkManager-tui-1.0.0-14.git20150121.b4ea599c.el7.x86_64
NetworkManager-glib-1.0.0-14.git20150121.b4ea599c.el7.x86_64
NetworkManager-team-1.0.0-14.git20150121.b4ea599c.el7.x86_64
NetworkManager-wifi-1.0.0-14.git20150121.b4ea599c.el7.x86_64
NetworkManager-wwan-1.0.0-14.git20150121.b4ea599c.el7.x86_64
NetworkManager-adsl-1.0.0-14.git20150121.b4ea599c.el7.x86_64
NetworkManager-libreswan-0.9.8.0-5.el7.x86_64
[root@kvm1 network-scripts]# NetworkManager-tui
bash: NetworkManager-tui: command not found...
[root@kvm1 network-scripts]# rpm -ql NetworkManager-tui
/usr/bin/nmtui
/usr/bin/nmtui-connect
/usr/bin/nmtui-edit
/usr/bin/nmtui-hostname
/usr/share/man/man1/nmtui-connect.1.gz
/usr/share/man/man1/nmtui-edit.1.gz
/usr/share/man/man1/nmtui-hostname.1.gz
/usr/share/man/man1/nmtui.1.gz

[root@kvm1 network-scripts]# rpm -ql initscripts|more

 https://wiki.archlinux.org/index.php/Wireless_network_configuration_%28%E7%AE%80%E4%BD%93%E4%B8%AD%E6%96%87%29#.E5.85.B3.E8.81.94

以下是无线网络配置

yum install iw
yum install util-linux    lscpu
yum install usbutils    lsusb
yum install pciutils    lspci


[root@localhost network-scripts]# dmesg |grep usbcore
[    0.122031] usbcore: registered new interface driver usbfs
[    0.122034] usbcore: registered new interface driver hub
[    0.122047] usbcore: registered new device driver usb
[    0.411834] usbcore: registered new interface driver usbserial
[    0.411837] usbcore: registered new interface driver usbserial_generic
[    0.413292] usbcore: registered new interface driver usbhid
[    6.089705] usbcore: registered new interface driver rtl8192cu
[root@localhost network-scripts]# dmesg |grep firmware
[    5.733830] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin
[root@localhost network-scripts]# lsusb
Bus 001 Device 002: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN Adapter
[root@localhost network-scripts]# lspci
00:19.0 Ethernet controller: Intel Corporation Ethernet Connection I217-V


ip link
ip link set wlp0s20u1 up     
iw phy|list　　二者是一样的
[root@localhost ~]# iw dev
phy#0
        Interface wlp0s20u1
                ifindex 3
                wdev 0x1
                addr ec:17:2f:ce:48:71
                type managed
[root@localhost ~]# iw reg get
country 00: DFS-UNSET
        (2402 - 2472 @ 40), (6, 20)
        (2457 - 2482 @ 40), (6, 20), PASSIVE-SCAN
        (2474 - 2494 @ 20), (6, 20), NO-OFDM, PASSIVE-SCAN
        (5170 - 5250 @ 160), (6, 20), PASSIVE-SCAN
        (5250 - 5330 @ 160), (6, 20), DFS, PASSIVE-SCAN
        (5490 - 5730 @ 160), (6, 20), DFS, PASSIVE-SCAN
        (5735 - 5835 @ 80), (6, 20), PASSIVE-SCAN
        (57240 - 63720 @ 2160), (N/A, 0)
iw wlp0s20u1 scan        扫描可用热点
iw wlp0s20u1 link         获取连接状态
iw wlp0s20u1 set type managed
iw wlp0s20u1 connect -w wo

wpa_supplicant -B -i wlp0s20u1 -c <(wpa_passphrase "wo" "3g8888")

wpa_supplicant -B -i wlp0s20u1 -c /etc/wpa_supplicant/wpa_supplicant.conf


[root@localhost ~]# nmcli device wifi list
*  SSID              MODE   CHAN  RATE       SIGNAL  BARS  SECURITY
   TP-LINK_wang      Infra  6     54 Mbit/s  87      ▂▄▆█  WPA1 WPA2
   ................  Infra  1     54 Mbit/s  74      ▂▄▆_  WPA1 WPA2
   dt                Infra  1     54 Mbit/s  57      ▂▄▆_  WPA1 WPA2
   ChinaNet-RQde     Infra  3     54 Mbit/s  47      ▂▄__  WPA1
   FAST_1BCE         Infra  11    54 Mbit/s  44      ▂▄__  WPA1 WPA2
   MERCURY_B2B2B8    Infra  6     48 Mbit/s  47      ▂▄__  WPA1 WPA2
   TP-LINK_22C6      Infra  11    54 Mbit/s  60      ▂▄▆_  WPA1 WPA2
   TP-LINK_A5DA9E    Infra  1     54 Mbit/s  57      ▂▄▆_  WPA1 WPA2
   Tenda_25B898      Infra  8     54 Mbit/s  44      ▂▄__  WPA1
   TP-LINK_0D82      Infra  1     54 Mbit/s  57      ▂▄▆_  WPA1 WPA2
   wo                Infra  6     54 Mbit/s  67      ▂▄▆_  WPA2
[root@localhost ~]# nmcli --ask device connect wlp0s20u1
[root@localhost ~]# nmcli device  wifi connect "wo" password "3g88888" ifname wlp0s20u1

[root@localhost network-scripts]# nmcli --ask device wifi connect wo
Device 'wlp0s20u1' successfully activated with '348382ff-dd55-4a7d-b997-e3e4530dee3b'.
[root@localhost network-scripts]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 74:d4:35:f3:12:83 brd ff:ff:ff:ff:ff:ff
    inet 192.168.10.116/24 brd 192.168.10.255 scope global dynamic eno1
       valid_lft 4439sec preferred_lft 4439sec
3: wlp0s20u1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether ec:17:2f:ce:48:71 brd ff:ff:ff:ff:ff:ff
    inet 192.168.10.111/24 brd 192.168.10.255 scope global dynamic wlp0s20u1
       valid_lft 7194sec preferred_lft 7194sec

[root@localhost network-scripts]# ip link set eno1 down

[root@localhost ~]# iw wlp0s20u1 link
Connected to f8:d1:11:fd:1a:d8 (on wlp0s20u1)
        SSID: wo
        freq: 2437
        RX: 4823458 bytes (10181 packets)
        TX: 270599 bytes (3469 packets)
        signal: -51 dBm
        tx bitrate: 54.0 MBit/s

        bss flags:      short-preamble short-slot-time
        dtim period:    1
        beacon int:     100

根据日志确定是无线路由器的密钥AES，客户端不支持
[root@localhost wpa_supplicant]# tail -f /var/log/wpa_supplicant.log

wlp0s20u1: CTRL-EVENT-DISCONNECTED bssid=f8:d1:11:fd:1a:d8 reason=3 locally_generated=1
wlp0s20u1: Failed to initiate AP scan
wlp0s20u1: SME: Trying to authenticate with f8:d1:11:fd:1a:d8 (SSID='wo' freq=2437 MHz)
wlp0s20u1: SME: Authentication request to the driver failed
wlp0s20u1: Associated with f8:d1:11:fd:1a:d8
wlp0s20u1: WPA: Invalid EAPOL-Key MIC when using TPTK - ignoring TPTK
wlp0s20u1: WPA: Could not verify EAPOL-Key MIC - dropping packet
wlp0s20u1: Authentication with f8:d1:11:fd:1a:d8 timed out.
wlp0s20u1: CTRL-EVENT-DISCONNECTED bssid=f8:d1:11:fd:1a:d8 reason=3 locally_generated=1
wlp0s20u1: WPA: 4-Way Handshake failed - pre-shared key may be incorrect
wlp0s20u1: CTRL-EVENT-SSID-TEMP-DISABLED id=0 ssid="wo" auth_failures=1 duration=10
wlp0s20u1: No network configuration found for the current AP

		
wlp0s20u1: CTRL-EVENT-DISCONNECTED bssid=f8:d1:11:fd:1a:d8 reason=3 locally_generated=1
wlp0s20u1: Associated with f8:d1:11:fd:1a:d8
wlp0s20u1: WPA: CCMP is used, but EAPOL-Key descriptor version (1) is not 2
wlp0s20u1: WPA: CCMP is used, but EAPOL-Key descriptor version (1) is not 2
wlp0s20u1: Authentication with f8:d1:11:fd:1a:d8 timed out.
wlp0s20u1: CTRL-EVENT-DISCONNECTED bssid=f8:d1:11:fd:1a:d8 reason=3 locally_generated=1
wlp0s20u1: Failed to initiate AP scan
wlp0s20u1: Associated with f8:d1:11:fd:1a:d8
wlp0s20u1: CTRL-EVENT-CONNECTED - Connection to f8:d1:11:fd:1a:d8 completed [id=0 id_str=]

在路由器上将原来的AES改为TKIP就可以了

下面或许会有用

[root@localhost ~]# vi /etc/wpa_supplicant/wpa_supplicant.conf

ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=0
eapol_version=1
#ap_scan=0
#fast_reauth=1
network={
ssid="Jay"
key_mgmt=WPA-PSK
proto=WPA
pairwise=TKIP
group=TKIP
psk="MyKeyGoesHere"
}

ctrl_interface=/var/run/wpa_supplicant
ap_scan=2

network={
ssid="yours here"
scan_ssid=1
proto=RSN
key_mgmt=WPA-PSK
group=TKIP
pairwise=TKIP
psk="yours here"
}

ethtool - query or control network driver and hardware settings

[root@ka1che225 ~]# ethtool -g enp3s0
Ring parameters for enp3s0:
Cannot get device ring settings: Operation not supported

[root@ka1che225 ~]# ethtool -i enp3s0
driver: r8169
version: 2.3LK-NAPI
firmware-version: rtl8168g-2_0.0.1 02/06/13
expansion-rom-version:
bus-info: 0000:03:00.0
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: yes
supports-priv-flags: no


[root@ka1che225 ~]# ethtool -K enp3s0 tso off

https://www.cnblogs.com/lvyilong316/p/6818231.html
linux tcp GSO和TSO实现

[root@ka1che225 ~]# ethtool --show-features enp3s0
Features for enp3s0:
rx-checksumming: on
tx-checksumming: off
        tx-checksum-ipv4: off
        tx-checksum-ip-generic: off [fixed]
        tx-checksum-ipv6: off
        tx-checksum-fcoe-crc: off [fixed]
        tx-checksum-sctp: off [fixed]
scatter-gather: off
        tx-scatter-gather: off
        tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: off
        tx-tcp-segmentation: off
        tx-tcp-ecn-segmentation: off [fixed]
        tx-tcp6-segmentation: off
        tx-tcp-mangleid-segmentation: off
udp-fragmentation-offload: off [fixed]
generic-segmentation-offload: off [requested on]
generic-receive-offload: on
large-receive-offload: off [fixed]
rx-vlan-offload: on
tx-vlan-offload: on
ntuple-filters: off [fixed]
receive-hashing: off [fixed]
highdma: on [fixed]
rx-vlan-filter: off [fixed]
vlan-challenged: off [fixed]
tx-lockless: off [fixed]
netns-local: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: off [fixed]
tx-gre-segmentation: off [fixed]
tx-ipip-segmentation: off [fixed]
tx-sit-segmentation: off [fixed]
tx-udp_tnl-segmentation: off [fixed]
tx-mpls-segmentation: off [fixed]
fcoe-mtu: off [fixed]
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off
rx-all: off
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
busy-poll: off [fixed]
tx-gre-csum-segmentation: off [fixed]
tx-udp_tnl-csum-segmentation: off [fixed]
tx-gso-partial: off [fixed]
tx-sctp-segmentation: off [fixed]
l2-fwd-offload: off [fixed]
hw-tc-offload: off [fixed]

[root@ka1che225 ~]# ethtool -P enp3s0
Permanent address: 9c:5c:8e:71:69:06
[root@ka1che225 ~]# ethtool -S enp3s0
NIC statistics:
     tx_packets: 22796988
     rx_packets: 93239180
     tx_errors: 0
     rx_errors: 0
     rx_missed: 0
     align_errors: 0
     tx_single_collisions: 0
     tx_multi_collisions: 0
     unicast: 21604090
     broadcast: 24823507
     multicast: 46811583
     tx_aborted: 0
     tx_underrun: 0

[root@ka1che225 ~]# ethtool -T enp3s0
Time stamping parameters for enp3s0:
Capabilities:
        software-transmit     (SOF_TIMESTAMPING_TX_SOFTWARE)
        software-receive      (SOF_TIMESTAMPING_RX_SOFTWARE)
        software-system-clock (SOF_TIMESTAMPING_SOFTWARE)
PTP Hardware Clock: none
Hardware Transmit Timestamp Modes: none
Hardware Receive Filter Modes: none	 
	 
[root@ka1che225 ~]# ethtool --phy-statistics enp3s0
no stats available
[root@ka1che225 ~]# ethtool -w enp3s0
Can not get dump level
: Operation not supported
[root@ka1che225 ~]# ethtool -l enp3s0
Channel parameters for enp3s0:
Cannot get device channel parameters
: Operation not supported
[root@ka1che225 ~]# ethtool --module-info enp3s0
Cannot get module EEPROM information: Operation not supported

ethtool -k|--show-features|--show-offload DEVNAME       Get state of protocol offload and other features
ethtool -k enp3s0


tcp-segmentation-offload: off
        tx-tcp-segmentation: off
        tx-tcp-ecn-segmentation: off [fixed]
        tx-tcp6-segmentation: off
        tx-tcp-mangleid-segmentation: off
udp-fragmentation-offload: off [fixed]
generic-segmentation-offload: off [requested on]
generic-receive-offload: on
large-receive-offload: off [fixed]

tso
ufo
gso

gro
lro


这些offload特性都是为了提升网络收/发性能。TSO、UFO和GSO是对应网络发送，在接收方向上对应的是LRO、GRO。

TSO

TSO(TCP Segmentation Offload)，是一种利用网卡对TCP数据包分片，减轻CPU负荷的一种技术，有时也被叫做 LSO (Large segment offload) ，TSO是针对TCP的，UFO是针对UDP的。如果硬件支持 TSO功能，同时也需要硬件支持的TCP校验计算和分散/聚集 (Scatter Gather) 功能。

GSO

GSO(Generic Segmentation Offload)，它比TSO更通用，基本思想就是尽可能的推迟数据分片直至发送到网卡驱动之前，此时会检查网卡是否支持分片功能（如TSO、UFO）,如果支持直接发送到网卡，如果不支持就进行分片后再发往网卡。这样大数据包只需走一次协议栈，而不是被分割成几个数据包分别走，这就提高了效率。

LRO

LRO(Large Receive Offload)，通过将接收到的多个TCP数据聚合成一个大的数据包，然后传递给网络协议栈处理，以减少上层协议栈处理 开销，提高系统接收TCP数据包的能力。

GRO

GRO(Generic Receive Offload)，基本思想跟LRO类似，克服了LRO的一些缺点，更通用。后续的驱动都使用GRO的接口，而不是LRO。

RSS

RSS(Receive Side Scaling)，是一项网卡的新特性，俗称多队列。具备多个RSS队列的网卡，可以将不同的网络流分成不同的队列，再分别将这些队列分配到多个CPU核心上进行处理，从而将负荷分散，充分利用多核处理器的能力。

可以使用如下命令来关闭对应的参数：

/usr/sbin/ethtool -K eth1 gro off
/usr/sbin/ethtool -K eth1 lro off
/usr/sbin/ethtool -K eth1 tso off