cat(1) -n %2Fhome%2Fmarcos%2FEvidencias%2FBulk_PC-20170427_%2Fwinlnk.txt %7C egrep -ion %22%5Ba-zA-Z%5D%3A%5B%5C%5D.*.*%22 %7C egrep -i %22jpg%7Cjpeg%22
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