See the -x option. The default value is rasp . Suggest using the specified number of bytes of internal store to tune performance. I Decompress the input if it is compressed. Some or all of these may be disabled.
Higher levels produce more output.
A missing character count in pos2 means 0, which in turn excludes any -t tab character from the end of the key. White space before a field is part of the field, except under option -b . A b flag may be attached independently to pos1 and pos2 . When there are multiple sort keys, later keys are compared only after all earlier keys compare equal. Except under option -s , lines with all keys equal are ordered with all bytes significant.