how to look at the details of a file linux code example

Example 1: linux find from file content

grep -rnw '/path/to/somewhere/' -e 'pattern'

Example 2: find a file in linux terminal

find /home/username/ -name "*.err"

Example 3: how to get file type in linux

file <filename>

Example 4: linux find file

# syntax 
# find *</path/to/dir> '(' *<Filter-1> *<and/or-operator> *<filter-2> ')'

# example 
find . '(' -name "Test*.pm" -a ! -name 'Useless*' ')'