sort – sort and/or merge files|
sort [ –cmuMbdfinrwtx ] [ +pos1 [ –pos2 ] ... ] ... [ –k pos1 [ ,pos2
] ] ...|
Sort sorts lines of all the files together and writes the result
on the standard output. If no input files are named, the standard
input is sorted.
–M Compare as months. The first three non–white space characters of the field are folded to upper case and compared so that JAN precedes FEB, etc. Invalid fields compare low to JAN.
–b Ignore leading white space (spaces and tabs) in field comparisons.
–d `Phone directory' order: only letters, accented letters, digits and white space are significant in comparisons.
–f Fold lower case letters onto upper case. Accented characters are folded to their non–accented upper case form.
–i Ignore characters outside the ASCII range 040–0176 in non–numeric comparisons.
–w Like –i, but ignore only tabs and spaces.
–n An initial numeric string, consisting of optional white space, optional plus or minus sign, and zero or more digits with optional decimal point, is sorted by arithmetic value.
–g Numbers, like –n but with optional e–style exponents, are sorted by value.
–r Reverse the sense of comparisons.
–tx `Tab character' separating fields is x.
–c Check that the single input file is sorted according to the ordering rules; give no output unless the file is out of sort.
–m Merge; assume the input files are already sorted.
–u Suppress all but one in each set of equal lines. Ignored bytes and bytes outside keys do not participate in this comparison.
–o The next argument is the name of an output file to use instead of the standard output. This file may be the same as one of the inputs.
–Tdir Put temporary files in dir rather than in /tmp.
sort –u +0f +0 list|
Sort comments and exits with non–null status for various trouble
conditions and for disorder discovered under option –c.|
An external null character can be confused with an internally
generated end–of–field character. The result can make a sub–field
not sort less than a longer field.