Linux 在 SSH 会话中查找客户端的 IP 地址
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Find the IP address of the client in an SSH session
提问by flybywire
I have a script that is to be run by a person that logs in to the server with SSH.
我有一个脚本，由使用SSH登录服务器的人运行。
Is there a way to find out automatically what IP address the user is connecting from?
有没有办法自动找出用户连接的 IP 地址？
Of course, I could ask the user (it is a tool for programmers, so no problem with that), but it would be cooler if I just found out.
当然，我可以问用户（它是程序员的工具，所以没问题），但如果我刚刚发现会更酷。
采纳答案by nolim1t
Check if there is an environment variable called:
检查是否有一个名为的环境变量：
$SSH_CLIENT
OR
或者
$SSH_CONNECTION
(or any other environment variables) which gets set when the user logs in. Then process it using the user login script.
（或任何其他环境变量）在用户登录时设置。然后使用用户登录脚本处理它。
Extract the IP:
提取IP：
$ echo $SSH_CLIENT | awk '{ print }'
1.2.3.4
$ echo $SSH_CONNECTION | awk '{print }'
1.2.3.4
回答by Daniel Schneller
Usually there is a log entry in /var/log/messages (or similar, depending on your OS) which you could grep with the username.
通常在 /var/log/messages（或类似的，取决于您的操作系统）中有一个日志条目，您可以使用用户名对其进行 grep。
回答by mihi
Assuming he opens an interactive session (that is, allocates a pseudo terminal) and you have access to stdin, you can call an ioctl on that deviceto get the device number (/dev/pts/4711) and try to find that one in /var/run/utmp(where there will also be the username and the IP address the connection originated from).
假设他打开了一个交互式会话（即分配了一个伪终端）并且您可以访问 stdin，您可以在该设备上调用一个 ioctl来获取设备号 (/dev/pts/4711) 并尝试在/var/run/utmp（其中还将包含用户名和连接来源的 IP 地址）。
回答by vncprado
You could use the command:
您可以使用以下命令：
server:~# pinky
that will give to you somehting like this:
这会给你这样的东西：
Login Name TTY Idle When Where
root root pts/0 2009-06-15 13:41 192.168.1.133
回答by aric
netstat will work (at the top something like this) tcp 0 0 10.x.xx.xx:ssh someipaddress.or.domainame:9379 ESTABLISHED
netstat 将工作（在顶部像这样） tcp 0 0 10.x.xx.xx:ssh someipaddress.or.domainame:9379 ESTABLISHED
回答by AlexP
Try the following to get just the IP address:
尝试以下操作以获取 IP 地址：
who am i|awk '{ print }'
回答by pfrandsen
Linux: who am i | awk '{print $5}' | sed 's/[()]//g'
Linux：我是谁 | awk '{print $5}' | sed 's/[()]//g'
AIX: who am i | awk '{print $6}' | sed 's/[()]//g'
AIX：我是谁| awk '{print $6}' | sed 's/[()]//g'
回答by Sébastien Moreau
netstat -tapen | grep ssh | awk '{ print }'
回答by gerard
netstat -tapen | grep ssh | awk '{ print }'
Output:
输出：
two # in my experiment
两个 # 在我的实验中
netstat -tapen | grep ssh | awk '{ print }'
gives the IP address.
给出 IP 地址。
Output:
输出：
127.0.0.1:22 # in my experiment
But the results are mixed with other users and stuff. It needs more work.
但结果与其他用户和东西混合在一起。它需要更多的工作。
回答by Spindrift
who am i | awk '{print }' | sed 's/[()]//g' | cut -f1 -d "." | sed 's/-/./g'
export DISPLAY=`who am i | awk '{print }' | sed 's/[()]//g' | cut -f1 -d "." | sed 's/-/./g'`:0.0
I use this to determine my DISPLAY variable for the session when logging in via ssh and need to display remote X.
当通过 ssh 登录并需要显示远程 X 时，我使用它来确定会话的 DISPLAY 变量。
