First, try to deter­mine the shell echo $PATH echo $SHELL Try to set the PATH variable export PATH=/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin Upload the escape_from_restricted_shell.c pro­gram (scripts directory). Have a look into a local bin direc­to­ry and see if you can use any bina­ry there to escape.