Plan 9 - man page for tail (plan9 section 1)
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tail - deliver the last part of a file
tail [ +-number[lbc][rf] ] [ file ]
tail [ -fr ] [ -n nlines ] [ -c ncharacters ] [ file ]
Tail copies the named file to the standard output beginning at a designated place. If no
file is named, the standard input is copied.
Copying begins at position +number measured from the beginning, or -number from the end of
the input. Number is counted in lines, 1K blocks or characters, according to the appended
flag or Default is -10l (ten ell).
The further flag causes tail to print lines from the end of the file in reverse order;
(follow) causes tail, after printing to the end, to keep watch and print further data as
The second syntax is that promulgated by POSIX, where the numbers rather than the options
Print the last 10 lines of a file.
tail +0f file
Print a file, and continue to watch data accumulate as it grows.
sed 10q file
Print the first 10 lines of a file.
Tails relative to the end of the file are treasured up in a buffer, and thus are limited
According to custom, option +number counts lines from 1, and counts blocks and characters
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