.out files in Linux
In Linux ".out" is typically an executable binary file generated by a compiler like gcc etc.
Its commonly used ad default filename for complied programs, if no specific output filename is specified during compilation.
Reading a binary/.out file
$ cat *.out | grep -ia "Graph schema version 304"
Here, we are using -a as to interpret it as text, this is equivalent to the --binary-files=text
$ grep -r "Graph schema version 304" *.out
This will list the file that containing pattern.
***