tail - output trailing portion of one or more files tail [
options ] [file ...] copies one or more input files to standard
output starting at a designated point for each file. Copying
starts at the point indicated by the options and is unlimited in
size. By default a header of the form ==> filename <== is output
before all but the first file but this can be changed with the
-q and -v options. If no file is given, or if the file is -,
tail copies from standard input. The start of the file is
defined as the current offset. The option argument for -c can
optionally be followed by one of the following characters to
specify a different unit other than a single byte: - 512 bytes.
- 1 KiB. - 1 MiB. - 1 GiB. For backwards compatibility, -number
is equivalent to -n number to -n -number may also have these
option suffixes: b c f g k l m r - -n, --lines=lines Copy lines
lines from each file. A negative value for lines indicates an
offset from the end of the file. The default value is 10. - -b,
--blocks Copy units of 512