find command in linux

find /home/username/ -name "*.err"
find / -name "dir-name-here" find . -name tecmint.txt# syntax 
# find *</path/to/dir> '(' *<Filter-1> *<and/or-operator> *<filter-2> ')'

# example 
find . '(' -name "Test*.pm" -a ! -name 'Useless*' ')'find [options] [paths] [expression]