From 65f795e0e338186327a0451e4808d2474abaf000 Mon Sep 17 00:00:00 2001 From: DarkSun Date: Fri, 23 Aug 2019 00:52:58 +0800 Subject: [PATCH] =?UTF-8?q?=E9=80=89=E9=A2=98:=2020190823=20How=20To=20Che?= =?UTF-8?q?ck=20Your=20IP=20Address=20in=20Ubuntu=20[Beginner=E2=80=99s=20?= =?UTF-8?q?Tip]?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit sources/tech/20190823 How To Check Your IP Address in Ubuntu -Beginner-s Tip.md --- ...ur IP Address in Ubuntu -Beginner-s Tip.md | 117 ++++++++++++++++++ 1 file changed, 117 insertions(+) create mode 100644 sources/tech/20190823 How To Check Your IP Address in Ubuntu -Beginner-s Tip.md diff --git a/sources/tech/20190823 How To Check Your IP Address in Ubuntu -Beginner-s Tip.md b/sources/tech/20190823 How To Check Your IP Address in Ubuntu -Beginner-s Tip.md new file mode 100644 index 0000000000..436dd84c37 --- /dev/null +++ b/sources/tech/20190823 How To Check Your IP Address in Ubuntu -Beginner-s Tip.md @@ -0,0 +1,117 @@ +[#]: collector: (lujun9972) +[#]: translator: ( ) +[#]: reviewer: ( ) +[#]: publisher: ( ) +[#]: url: ( ) +[#]: subject: (How To Check Your IP Address in Ubuntu [Beginner’s Tip]) +[#]: via: (https://itsfoss.com/check-ip-address-ubuntu/) +[#]: author: (Sergiu https://itsfoss.com/author/sergiu/) + +How To Check Your IP Address in Ubuntu [Beginner’s Tip] +====== + +Wonder what’s your IP address? Here are several ways to check IP address in Ubuntu and other Linux distributions. + +![][1] + +### What is an IP Address? + +An **Internet Protocol address** (commonly referred to as **IP address**) is a numerical label assigned to each device connected to a computer network (using the Internet Protocol). An IP address serves both the purpose of identification and localisation of a machine. + +The **IP address** is _unique_ within the network, allowing the communication between all connected devices. + +You should also know that there are two **types of IP addresses**: **public** and **private**. The **public IP address** is the address used to communicate over the Internet, the same way your physical address is used for postal mail. However, in the context of a local network (such as a home where are router is used), each device is assigned a **private IP address** unique within this sub-network. This is used inside this local network, without directly exposing the public IP (which is used by the router to communicate with the Internet). + +Another distinction can be made between **IPv4** and **IPv6** protocol. **IPv4** is the classic IP format,consisting of a basic 4 part structure, with four bytes separated by dots (e.g. 127.0.0.1). However, with the growing number of devices, IPv4 will soon be unable to offer enough addresses. This is why **IPv6** was invented, a format using **128-bit addresses** (compared to the **32-bit addresses** used by **IPv4**). + +## Checking your IP Address in Ubuntu [Terminal Method] + +The fastest and the simplest way to check your IP address is by using the ip command. You can use this command in the following fashion: + +``` +ip addr show +``` + +It will show you both IPv4 and IPv6 addresses: + +![Display IP Address in Ubuntu Linux][2] + +Actually, you can further shorten this command to just `ip a`. It will give you the exact same result. + +``` +ip a +``` + +If you prefer to get minimal details, you can also use **hostname**: + +``` +hostname -I +``` + +There are some other [ways to check IP address in Linux][3] but these two commands are more than enough to serve the purpose. + +[][4] + +Suggested read  How to Disable IPv6 on Ubuntu Linux + +What about ifconfig? + +Long-time users might be tempted to use ifconfig (part of net-tools), but that program is deprecated. Some newer Linux distributions don’t include this package anymore and if you try running it, you’ll see ifconfig command not found error. + +## Checking IP address in Ubuntu [GUI Method] + +If you are not comfortable with the command line, you can also check IP address graphically. + +Open up the Ubuntu Applications Menu (**Show Applications** in the bottom-left corner of the screen) and search for **Settings** and click on the icon: + +![Applications Menu Settings][5] + +This should open up the **Settings Menu**. Go to **Network**: + +![Network Settings Ubuntu][6] + +Pressing on the **gear icon** next to your connection should open up a window with more settings and information about your link to the network, including your IP address: + +![IP Address GUI Ubuntu][7] + +## Bonus Tip: Checking your Public IP Address (for desktop computers) + +First of all, to check your **public IP address** (used for communicating with servers etc.) you can [use curl command][8]. Open up a terminal and enter the following command: + +``` +curl ifconfig.me +``` + +This should simply return your IP address with no additional bulk information. I would recommend being careful when sharing this address, since it is the equivalent to giving out your personal address. + +**Note:** _If **curl** isn’t installed on your system, simply use **sudo apt install curl -y** to solve the problem, then try again._ + +Another simple way you can see your public IP address is by searching for **ip address** on Google. + +**Summary** + +In this article I went through the different ways you can find your IP address in Uuntu Linux, as well as giving you a basic overview of what IP addresses are used for and why they are so important for us. + +I hope you enjoyed this quick guide. Let us know if you found this explanation helpful in the comments section! + +-------------------------------------------------------------------------------- + +via: https://itsfoss.com/check-ip-address-ubuntu/ + +作者：[Sergiu][a] +选题：[lujun9972][b] +译者：[译者ID](https://github.com/译者ID) +校对：[校对者ID](https://github.com/校对者ID) + +本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出 + +[a]: https://itsfoss.com/author/sergiu/ +[b]: https://github.com/lujun9972 +[1]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/08/checking-ip-address-ubuntu.png?resize=800%2C450&ssl=1 +[2]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/08/ip_addr_show.png?fit=800%2C493&ssl=1 +[3]: https://linuxhandbook.com/find-ip-address/ +[4]: https://itsfoss.com/disable-ipv6-ubuntu-linux/ +[5]: https://i2.wp.com/itsfoss.com/wp-content/uploads/2019/08/applications_menu_settings.jpg?fit=800%2C309&ssl=1 +[6]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/08/network_settings_ubuntu.jpg?fit=800%2C591&ssl=1 +[7]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/08/ip_address_gui_ubuntu.png?fit=800%2C510&ssl=1 +[8]: https://linuxhandbook.com/curl-command-examples/