- 论坛徽章:
- 33
|
回复 #5 Ksharp 的帖子
cut cuts out (extracts) columns from a table or fields from each line
in a file; in data base parlance, it implements the projection of a
relation. Fields as specified by list can be fixed length (defined in
terms of character or byte position in a line when using the -c or -b
option), or the length can vary from line to line and be marked with a
field delimiter character such as the tab character (when using the -f
option). cut can be used as a filter; if no files are given, the
standard input is used. |
|