你好!我有下面这句话,它适用于Linux,但不是Solaris版本。echo $(expr '(' $(date -d $YEAR/9/30 +%s) - $(date +%s) + 86399 ')' / 86400) " days until deadline" the error is due to the datecommand date: illegal option -- d usage: date [-u] mmddHHMM[[cc]yy][.SS] date [-u] [+format] da