Available through those commands:
$ cat <files>
Without argument, cat reads the standard input. Also, it can be used to paste few files into one:
$ cat file1 > file2 > file3
$ echo [options] <text>
Options:
-n
doesn't end the line with a return signText options (inputted via " "):
\b
backspace\c
no new line\f
page feed\n
new line\digit
an octal number, represents an ASCII character\r
return (enter)\t
tabulation\v
vertical tabulation\\
backslash