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如何自动启动互联网连接，而无需每次手动运行“ethtool”

tag-icon • tag-icon networking lubuntu
如何自动启动互联网连接，而无需每次手动运行“ethtool”

每次 Linux 启动时，我都必须手动使用下面的两个命令才能获得有效的互联网连接。

ethtool -s eth0 autoneg off speed 100 duplex full

ifup eth0

如果我ethtool eth0在启动后立即运行，它会将问题描述为Link detected: no。 https://paste.debian.net/hidden/d2b0d461/

如果我只将来自该路由器的电缆更改为我之前的 DSL 路由器连接（另一个 ISP，但甚至使用相同的以太网电缆连接到 Linux 计算机），则同一台 Linux 计算机在重新启动后会收到互联网连接，无需其他补充命令。

我正在寻找一种方法，以便在 Lubuntu 启动时自动启动互联网连接。

/etc/网络/接口：

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
#auto eth0
iface eth0 inet dhcp

ethtool -s eth0 autoneg off speed 100 duplex full
allow-hotplug eth0

#iface wlan0 inet manual
#wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf

/etc/rc.local：

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

echo 500 > /sys/class/backlight/intel_backlight/brightness
xrandr -s 960x540
rfkill block bluetooth
rfkill block wifi
ethtool -s eth0 autoneg off speed 100 duplex full
ip link set eth0 up
ifup eth0
dhcpcd eth0

exit 0

systemctl status rc-local: 
globalisation@WindowsXP:~$ systemctl status rc-local
● rc-local.service - /etc/rc.local Compatibility
   Loaded: loaded (/lib/systemd/system/rc-local.service; static; vendor preset: 
  Drop-In: /lib/systemd/system/rc-local.service.d
           └─debian.conf
   Active: failed (Result: exit-code) since Sun 2017-06-04 00:31:28 CEST; 15min 
  Process: 636 ExecStart=/etc/rc.local start (code=exited, status=1/FAILURE)

Jun 04 00:31:27 WindowsXP systemd[1]: Starting /etc/rc.local Compatibility...
Jun 04 00:31:28 WindowsXP rc.local[636]: Can't open display
Jun 04 00:31:28 WindowsXP systemd[1]: rc-local.service: Control process exited, 
Jun 04 00:31:28 WindowsXP systemd[1]: Failed to start /etc/rc.local Compatibilit
Jun 04 00:31:28 WindowsXP systemd[1]: rc-local.service: Unit entered failed stat
Jun 04 00:31:28 WindowsXP systemd[1]: rc-local.service: Failed with result 'exit

globalisation@WindowsXP:~$

Lubuntu启动时出现以下错误：

Failed to start LSB: IPV4 DHCP client with IPV4ALL support. See 'systemctl status dhcpcd.service' for details 16.780656 usb 1-1.4.3: device descriptor read/64, error -110

/etc/sysctl.conf：

#
# /etc/sysctl.conf - Configuration file for setting system variables
# See /etc/sysctl.d/ for additional system variables.
# See sysctl.conf (5) for information.
#

#kernel.domainname = example.com

# Uncomment the following to stop low-level messages on console
#kernel.printk = 3 4 1 3

##############################################################3
# Functions previously found in netbase
#

# Uncomment the next two lines to enable Spoof protection (reverse-path filter)
# Turn on Source Address Verification in all interfaces to
# prevent some spoofing attacks
#net.ipv4.conf.default.rp_filter=1
#net.ipv4.conf.all.rp_filter=1

# Uncomment the next line to enable TCP/IP SYN cookies
# See http://lwn.net/Articles/277146/
# Note: This may impact IPv6 TCP sessions too
#net.ipv4.tcp_syncookies=1

# Uncomment the next line to enable packet forwarding for IPv4
#net.ipv4.ip_forward=1

# Uncomment the next line to enable packet forwarding for IPv6
#  Enabling this option disables Stateless Address Autoconfiguration
#  based on Router Advertisements for this host
#net.ipv6.conf.all.forwarding=1


###################################################################
# Additional settings - these settings can improve the network
# security of the host and prevent against some network attacks
# including spoofing attacks and man in the middle attacks through
# redirection. Some network environments, however, require that these
# settings are disabled so review and enable them as needed.
#
# Do not accept ICMP redirects (prevent MITM attacks)
#net.ipv4.conf.all.accept_redirects = 0
#net.ipv6.conf.all.accept_redirects = 0
# _or_
# Accept ICMP redirects only for gateways listed in our default
# gateway list (enabled by default)
# net.ipv4.conf.all.secure_redirects = 1
#
# Do not send ICMP redirects (we are not a router)
#net.ipv4.conf.all.send_redirects = 0
#
# Do not accept IP source route packets (we are not a router)
#net.ipv4.conf.all.accept_source_route = 0
#net.ipv6.conf.all.accept_source_route = 0
#
# Log Martian Packets
#net.ipv4.conf.all.log_martians = 1
#

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

如果您有任何想法如何发生这种情况，我刚刚记得在讨论中相同的机器+相同的操作系统（Linux没有更改配置）+相同的以太网电缆总是自动“接收并保持”互联网（没有额外的手动命令）所有 3 种不同型号的路由器。

除了这第四个有问题的连接和路由器之外，所有 3 个连接和路由器均来自同一 ISP。

最好的祝愿。

答案1

rc.local 中的此错误消息是 xrandr 错误。 xrandr 在 rc.local 中不起作用。然后，因为 rc.local 正在使用 运行sh -e，所以它会在出现第一个错误时退出。因此，ethtool 行永远不会运行。

答案2

看来最终的结果是，为了在重新启动/关闭/睡眠后自动访问互联网，而无需更多手动命令：

/etc/网络/接口

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
iface eth0 inet dhcp
    pre-up ethtool -s eth0 autoneg off speed 100 duplex full

allow-hotplug eth0

/etc/rc.local

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

echo 70 > /sys/class/backlight/intel_backlight/brightness
rfkill block bluetooth
rfkill block wifi
ethtool -s eth0 autoneg off speed 100 duplex full
ip link set eth0 up

exit 0

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