sort - sort lines of text files
sort [-n] [-r] [-h] [-u] [-k N] [-t SEP] [file]...Options you will use
-n, --numeric-sort- Compare as numbers.
-h, --human-numeric-sort- Compare human sizes: 2K < 1M < 1G. Pairs with du -h.
-r, --reverse- Reverse the result.
-u, --unique- Output only the first of an equal run.
-k N[,M]- Sort on field N (through M).
-t SEP- Use SEP as the field separator.
-g, --general-numeric-sort- Compare as floating point numbers (1e3, 0.5).
-o, --output FILE- Write the result to FILE instead of stdout. Safe even when FILE is also the input.
-t, --field-separator SEP- Use SEP instead of blanks to split fields: -t: -t,
-k, --key KEYDEF- Sort by a key: -k2 from field 2 to the end, -k2,2 only field 2, -k2,2nr numeric and reversed for that key.
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