Find

#Find a file with a specific name
find . -name 'blah'
#Find a file owned by root 
find / -user root -perm -4000 -exec ls -ldb {} \; > /tmp/blah
#Find SUIDs
find / -user root -perm -4000 -print
#Find SGID
find / -group root -perm -2000 -print
#Exec a command once found
find . -name "*.c" -type f -exec ls-l {} \;