grep '^..' my_file
example
THIS
IS
THE
FILE
EOF_MYFILE
it gives as output only lines with at least 2 characters.
THIS
IS
THE
FILE
EOF_MYFILE
See also the results with grep '^' my_file
outputs
THIS
IS
THE
FILE
EOF_MYFILE
and also with grep '^.' my_file
outputs
THIS
IS
THE
FILE
EOF_MYFILE