It'a a classic restricted shell jail task. Connect to the console, and execute
> rbash-5.0$ echo *> > flag-xEpAN7X3tGYjt4Y0p0FD.txt jail.sh
No way to execute basic command like cat, ls:rbash: cat: command not found
But we can to this trick
![](https://i.imgur.com/4G22sdY.pnghttp://)
Note: in bash < is stdin redirect,  backticks used for executing command and use output of command as arguments data