ping

vmware安装后设置网络

两盒软妹~` 提交于 2019-12-10 10:09:43
CentOS安装无法ping 出现Name or service not known [root@www ~]# ping www.baidu.com ping: www.baidu.com: Name or service not known [root@www ~]# 1、网络配置查看 记住NAT设置中的子网IP、子网掩码、网关IP三项,接下来配置文件主要是这三项。 2、编辑Linux中的网络配置文件 vi /etc/sysconfig/network-scripts/ifcfg-ens33 #注 网络配置文件名可能会有不同,在输入到ifcfg时,可以连续按两下tab键,获取提示,比如我的机器 为 ifcfg-ens33 内容替换如下: TYPE=”Ethernet” BOOTPROTO=”static” #静态连接 NAME=”ens33” UUID=”1f093d71-07de-4ca5-a424-98e13b4e9532” DEVICE=”ens33” ONBOOT=”yes” #网络设备开机启动 IPADDR=”192.168.0.101” #192.168.59.x, x为3~255. NETMASK=”255.255.255.0” #子网掩码 GATEWAY=”192.168.66.2” #网关IP DNS1= 8.8.8.8 DNS2=8.8.8.4 3

Python console and text output from Ping including \n\r [duplicate]

跟風遠走 提交于 2019-12-10 10:06:06
问题 This question already has answers here : Convert bytes to a string (18 answers) Closed 6 years ago . I dont know what is happening, but when I am printing to the console or to a text file, the newline (\n) is not functioning but rather showing in the string. Any idea how to avoid this in both the console and the text file? My code: import subprocess hosts_file = open("hosts.txt","r") lines = hosts_file.readlines() for line in lines: line = line.strip() ping = subprocess.Popen(["ping", "-n",

Android: ping: icmp open socket: Operation not permitted

爱⌒轻易说出口 提交于 2019-12-10 09:51:55
问题 Is it possible to execute ping on Android 4.3 without root access? Some people suggest to sudo chmod u+s /system/bin/ping or set the permissions to 777 Is this possible on Android without root? 来源: https://stackoverflow.com/questions/21479968/android-ping-icmp-open-socket-operation-not-permitted

How is ping for non-root user implemented on Linux distros?

你。 提交于 2019-12-10 09:50:23
问题 I was browsing through the code for ping form iputils package for Linux. I noticed that ping uses raw sockets SOCK_RAW , which any userspace application requires root privilege to use. How do the developers of Linux distros manage to provide the ping command for non-root users ? 回答1: The ping executable is setuid root: $ ls -l /bin/ping -rwsr-xr-x 1 root root 35712 Nov 8 2011 /bin/ping 回答2: On modern distros, ping uses an extended file attribute to grant CAP_NET_RAW to unprivileged users.

Linux___网络命令__12

假装没事ソ 提交于 2019-12-10 04:07:16
39 网络命令:write 命令名称:write 命令所在路径:/usr/bin/write 执行权限:所有用户 语法:write<用户名> 功能描述:给用户发信息(用户必须在线),以ctrl+D保存结束 范例: ~write linzhiling ——————————————————————————————————————— 40 网络命令:wall 命令名称:wall 英文原意:write all 命令所在路径:/usr/bin/wall 执行权限:所有用户 语法:wall [message] 功能描述:发广播信息 范例: ~wall hello world ——————————————————————————————————————— 41 网络命令:ping 命令名称:ping 命令所在路径:/bin/ping 执行权限:所有用户 语法:ping 选项 IP地址 -c:指定发送次数 功能描述:测试网络连接连通性 范例: ~ping 192.268.1.156 备注:linux下使用ping命令后,会持续更新,想关闭需要按ctrl+c ——————————————————————————————————————— 42 网络命令:ifconfig 命令名称:ifconfig 命令所在路径:/sbin/ifconfig 执行权限:root 语法:ifconfig 网卡名称

How do I implement ICMP ping in Ruby using only the standard the socket library?

时光毁灭记忆、已成空白 提交于 2019-12-10 03:19:19
问题 It should be possible send and receive ICMP packets using the Ruby socket library but I do not see any good documentation on this. I do not want to use net-ping, icmp, ping, and all of these other libraries that either fail because of cross-platform issues, require devkit and custom building, which fail during the build process, are neglected and have not been updated for a lengthy time, and/or are just in general buggy. Does anyone have any good documentation on how to accomplish this? I

unix进程管道

余生颓废 提交于 2019-12-10 03:15:50
unix创建进程 管道 最近在要在路由器新加入一个application, 主要作用是 自动切换operation mode. 在流程中有一项要测试dns解析是否正常, 当然bash本身就有ping command, 但是有集成到c语言之中,就需要 使用进程管道, 我大致看了一下, 功能还不错, 下面介绍一下popen和 pclose #include <stdio.h> FILE *popen(const char *cmdstring, const char *type); int pclose(FILE *fp); 针对函数介绍几点: 1.popen首先fork一个子进程, 子进程之中调用exec执行 cmdsting命令, 并且返回一个标准IO文件指针, 2.如果type为"r",则指针连接到cmdstring 命令的标准输出, 即cmdsting命令的输出返回到该指针,可以从该文件指针读出cmdstring的命令. 3.如果typr为"w",则指针连接到cmdstring 命令的标准输入, 即可以向文件指针之中写入信息,给予子进程的标准输入. 4.子进程cmdstring命令由bash执行, 同时以sh -c cmdstring的形式执行, 意味着shell可以扩展cmdstring的任意字符. exp: ls *.c ; cmd 2>&1 5.和system一样,

综合练习2 设置访问权限,Easy-IP访问外网,内外网访问

风格不统一 提交于 2019-12-10 01:40:55
实验拓扑图: 实验要求: 1.pc 、路由、交换基本配置, vlan 间路由互通。 2.vlan20 、 vlan30 可以访问 FTP,VLAN10 不允许访问 FTP 。 3.AR1 通过 easy-ip 方式实现私网地址访问外网。 4. 只允许 client1 可以访问 WEB-SERVER 的 80 端口,其它 client 不能访问,放行其它的访问流量。 5. 在内网搭建 FTP 并允许外网用户 cl ent3访问。 实验步骤: 配置 S1 的 5 个接口 因为 AR1 连接 4 个不同的 vlan ,所以设置单臂路由: 将 G0/0/0 接口分为 0/0/0.1, 0/0/0.2 ,0/0/0.3 ,0/0/0.4 , 如下图所示: AR2 的 g0/0/0 接口 IP 设置为 12.1.1.2/24 g0/0/1 接口 IP 设置为 200.10.10.254/24 使用 client1 去 ping12.1.1.1 来检测其连通性,发现连通性配置完成 Vlan 之间 ping( 使用 client1 ping client2 的 192.168.2.100 的地址 ) 也能 ping 通 2.vlan20 、 vlan30 可以访问 FTP,VLAN10 不允许访问 FTP 。 在 AR1 上设置添加 ACL 高级设置( ACL 3000-3999 ) 根据

Ping.SendAsync() always successful, even if client is not pingable in cmd

只愿长相守 提交于 2019-12-09 17:46:11
问题 I try to ping some IP addresses in C# using Ping.SendAsync() method. I have a treeView with 5 IP addresses and use the SendAsync() method for each node. Here you can see: private void Form1_Load(object sender, EventArgs e) { byte[] buffer = Encoding.ASCII.GetBytes("."); PingOptions options = new PingOptions(50, true); AutoResetEvent reset = new AutoResetEvent(false); Ping ping = new Ping(); ping.PingCompleted += new PingCompletedEventHandler(ping_Complete); foreach (TreeNode node in treeView1

How to ping an IP using a socket and send data through it?

梦想的初衷 提交于 2019-12-09 13:30:07
问题 How can I ping an IP address using a socket program and send data through it? 回答1: You can't do ping in Java -- ping works at ICMP level which works on top of IP, whereas Java offers support for UDP (which sits on top of IP) and TCP (again on top of IP). It's basically a different (higher level) protocol for which you will need your own (native) library written in order to gain access to the IP stack. 回答2: Ping is a specific ICMP protocol. You cannot send ICMP packets in pure Java. However,