The use of sort, uniq, join under Linux

>>>sort commands Common related options:

Options	Description
-C	Checks to see if the file order is sorted, and if it is out of order, it outputs information about the first scrambled row, and then returns 1
-K	Specify the number of columns to sort
-B	Ignores all blank lines preceding each line, starting with the first visible character to compare
-F	Convert lowercase letters to uppercase to sort
-R	Invert Descending
-U	Remove Duplicate rows
-O	Output naming, redirection
-N	Sort by character
-T	Specify delimiter
-M	Sort by Month

[email protected] ~]# Sao Cat A.txt B.txt

1 ABC

2 def

3 Fun

4 Hello

-------

1 Beijing

2 we

3 Fongguang

4

[email protected] ~]# Sao Join A.txt B.txt

1 ABC Beijing

2 Def we

3 Fun Fongguang

4 Hello

The use of sort, uniq, join under Linux