Linuxが起動するたびに、以下の2つのコマンドを手動で使用してインターネットに接続する必要があります。
ethtool -s eth0 autoneg off speed 100 duplex full
ifup eth0
起動後すぐに実行すると、ethtool eth0問題は次のように説明されますLink detected: no。 https://paste.debian.net/hidden/d2b0d461/
このルーターのケーブルを古いDSLルーター接続（別のISPですが、Linuxコンピューターで同じイーサネットケーブルを使用していても）に変更すると、同じLinuxコンピューターが再起動後にインターネット接続を受信するため、他の追加コマンドは必要ありません。
Lubuntuが起動したときに自動的にインターネット接続を開始する方法を探しています。
/etc/ネットワーク/インターフェース:
# 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を起動すると、次のエラーが発生します。
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
これがどのように起こるのかわからない場合は、同じマシン+同じOS（Linuxの場合は設定変更なし）+同じイーサネットケーブルが常に自動的にインターネットを「受信および維持」します（追加の手動コマンドはありません）。 3つの異なるルーターモデルのすべてについて。
4番目の問題のある接続とルーターを除いて、3つの接続とルーターはすべて同じISPで提供されます。
最高の願い。
答え1
rc.localのこのエラーメッセージはxrandrエラーです。 xrandrはrc.localでは動作しません。その後、rc.localを実行するために使用されるため、sh -e最初のエラーが発生すると終了します。したがって、ethtool行は実行されません。
答え2
最終結果は、より多くの手動コマンドを必要とせずに再起動/終了/スリープ後に自動的にインターネットにアクセスするためのようです。
/etc/ネットワーク/インターフェース
# 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