cat(1) -n %2Fhome%2Fmarcos%2FEvidencias%2FBulk_PC-20170427_%2Fwindirs.txt %7C egrep %22%5B0-9%5D*-%5B0-9%5D*-%5B0-9%5D*T%5B0-9%5D*%3A%5B0-9%5D*%3A%5B0-9%5D*%22 %7C tail
concatenate files and print on the standard output
-n, --number
       number all output lines
Concatenate FILE(s), or standard input, to standard output.

With no FILE, or when FILE is -, read standard input.
source manpages: cat