☰

用于重新启动网络管理器的 shell 脚本——不是从终端

tag-icon • tag-icon 12.04 network-manager
用于重新启动网络管理器的 shell 脚本——不是从终端

我的问题可能看起来很奇怪，但如果你的互联网连接每隔几个小时就会中断一次，那么这确实很有意义。

我想知道如何使用 shell 脚本重新启动网络管理器。

现在我知道这sudo service network-manager restart就是在终端中执行此操作的方法，但遗憾的是这在 shell 脚本中不起作用。

有任何想法吗 ？

答案1

我也遇到过类似的问题。我的网络非常不稳定，当电源波动时，调制解调器就会离线，除非你拔下调制解调器并重新插入，否则无法看到它。否则，你可以使用 usb_modeswitch。所以我采用了上述脚本并对其进行了调整，以完成这两项任务。

#!/bin/bash

while true; do
#Anything less than a solid connection reboots the USB modem
LC_ALL=C nmcli -t -f TYPE,STATE dev | grep -q "^cdma:connected$"
if [ ! $? -eq 0 ]; then

#Reset USB Modem (12d1:1001 will have to be changed to match your modem)
sudo usb_modeswitch -R -v 12d1 -p 1001
#Wait 20 Seconds before trying to bring up the Broadband connections
sleep 20
    nmcli -t nm wwan on
#Wait Another 20 Seconds then test if the connection came up on its own as it is set to auto-connect
    sleep 20
LC_ALL=C nmcli -t -f TYPE,STATE dev | grep -q "^cdma:disconnected$"
if [ $? -eq 0 ]; then        
    nmcli -t con up id "Zantel connection"
    sleep 15
fi
    #wait approximately 15 sec to get connected

fi
#it does not worth keep it checking every millisecond.
#my connection will be reestablished within 5-15 seconds
sleep 2
#if anyone can code it better please feel free to comment
#TO-DO:: check for data received. if data < 15 KB after 20 seconds of connection
#reconnect mobile broadband connection  
done

谢谢！

答案2

不，这一点也不奇怪，当我使用 USB 网络设置调制解调器时，我也经常遇到连接问题。

在此处输入图片描述

以下是具体操作方法

gksu 服务网络管理器重启

将其保存在扩展名为 .sh 的文件中，然后右键单击>>属性>>权限以授予可执行文件权限

答案3

nmcli是一个用于控制 NetworkManager 并获取其状态的命令行工具。

我在使用移动宽带时也遇到了同样的问题。

我创建了一个如下所示的 shell 脚本。保存它，授予执行权限，然后将其放入启动应用程序中，它就可以完美运行了！如果连接断开，它将自动连接。这正是我想要的。

您需要更改网络 ID（对我来说是"Tata Docomo Internet"）。将其替换"Tata Docomo Internet"为您的移动宽带连接名称。

#!/bin/bash

while true; do
    LC_ALL=C nmcli -t -f TYPE,STATE dev | grep -q "^gsm:disconnected$"
    if [ $? -eq 0 ]; then
        #jdownloader is still in the download status so stop it because
        #internet is disconnected and jdownloader won't resume download 
        #when connected again
        #jdownloader --stop-download
        #sometimes I can not get connected after disconnection when 
        #I click on <name of the network connection>. I have to disable
        #and enable Mobile Broadband
        nmcli -t nm wwan off
        sleep 1
        nmcli -t nm wwan on
        sleep 1
        nmcli -t con up id "Tata Docomo Internet"
        #wait approximately 15 sec to get connected
        #if anyone can add better command to check for it just comment it :-p 
        sleep 15
        #now connected to internet so start download
        #jdownloader --start-download
    fi
    #it does not worth keep it checking every millisecond.
    #my connection will be reestablished within 5-15 seconds
    sleep 2
    #if anyone can code it better please feel free to comment
    #TO-DO:: check for data received. if data < 15 KB after 20 seconds of connection
    #reconnect mobile broadband connection  
done

答案4

这是对前一个问题的更好的解决方案。

我已经创建了 2 个脚本，第一个是这个……

sudo /home/{your user name}/UMM.sh

如果您创建了一个图标，通过启动这个“终端”，您可以输入您的 sudo 密码。

它调用的 UMM.sh 如下... 要使它工作，您必须阅读并更改脚本顶部的内容。您可能还需要更改一些行sleep以适合您的情况。

玩得开心！

#!/bin/bash

# *****************************************************************
#Change the following values based on your connection type and name

#Running 'nmcli -t -f TYPE,STATE dev'
#cdma or gsm (edit below)
ConType="cdma"

#Running 'nmcli -t -f NAME,TYPE con'
#The name of your connection in the network manager (edit below)
ConName="Zantel connection"

#Running 'lsusb' 
#Get the Vendor and Model ID for your modem (edit below)
USB_Vendor=12d1
USB_Product=1001

#Running 'ifconfig' 
#Get the Internet Connection (edit below)
IntCon=ppp0

# ******************************************************************

Network_State=$(nmcli -t -f TYPE,STATE dev)

echo -e 
echo -e "Current Network Status: \r"
echo $Network_State

i=0
error_count=0
#default 600
Good_connect_count=600
i=$[Good_connect_count - 50]
Default_ping_host="google.com"
pingtest=0

while true; do

#First off determine nature of problem if one exists
#Test to see if our connection type even exists
MT=C nmcli -t -f TYPE,STATE dev | grep -q $ConType

if [ $? -eq 0 ]; then

    #Check to see if the WWAN is enabled
    MT=C nmcli -t -f WWAN nm | grep -q "enabled"

    if [ $? -eq 0 ]; then

        #Check to see if we have a ppp0 connection
        MT=C ifconfig | grep -q $IntCon

        if [ $? -eq 0 ]; then
            error_count=$error_count
        else

            dt=$(date)
            echo At $dt we have no $IntCon connection...
            echo Attempting to start $ConName
            nmcli -t con up id "$ConName"
            sleep 5
            MT=C ifconfig | grep -q $IntCon

            if [ $? -eq 0 ]; then
                #error_count=0
                i=$Good_connect_count
            else
                error_count=$[$error_count+1]
                echo "$error_count Error(s) in a row"
            fi


        fi
    else

        dt=$(date)
        echo At $dt we have no WWAN...attempting to Enable
        nmcli -t nm wwan on
        sleep 5

        MT=C nmcli -t -f WWAN nm | grep -q "enabled"

        if [ $? -eq 0 ]; then
            error_count=$error_count
        else
            error_count=$[$error_count+1]
            echo "$error_count Error(s) in a row"
        fi
    fi

else
    dt=$(date)
    echo At $dt we dont have our $ConType connection
    echo Rebooting USB Device $USB_Vendor : $USB_Product
    #Reset USB Modem
    usb_modeswitch -Q -R -v $USB_Vendor -p $USB_Product
    error_count=0
    sleep 25
fi

if [ $error_count -ge 3 ]; then
    dt=$(date)
    echo We have an issue. Rebooting USB Device at $dt. 
    usb_modeswitch -Q -R -v $USB_Vendor -p $USB_Product
    sleep 25
    error_count=0
    i=0
fi

i=$[$i+1]
if [ $i -ge $Good_connect_count ]; then
    dt=$(date)
    if [ $pingtest -eq 0 ]; then

        MT=C ping -c1 $Default_ping_host | grep -q "64 bytes from"
        if [ $? -eq 0 ]; then
            echo At $dt connection is up and ping test passed!
            #error_count=0
            i=0
            pingtest=1
        else
            echo Connection is present but cant confirm ping connectivity. Retrying...
            error_count=$[$error_count+1]
            echo "$error_count Error(s) in a row"
        fi
    else
        pingtest=0


        MT=C wget --spider http://www.hp.com 2>&1 | grep -q "200"
        if [ $? -eq 0 ]; then
            echo At $dt connection is up and http test passed!
            error_count=0
            i=0
        else
            echo Connection is present but cant confirm http connectivity. Retrying...
            error_count=$[$error_count+1]
            echo "$error_count Error(s) in a row"
        fi

    fi
fi

done

相关内容