sort, as the name implies, is sorting
- -b Ignore the space characters at the beginning of each line.
- -c Check whether the files have been sorted in order.
- -d When sorting, deal with English letters, numbers and space characters, and ignore other characters.
- -f When sorting, treat lowercase letters as uppercase letters.
- -i When sorting, in addition to the ASCII characters between 040 and 176, other characters are ignored.
- -m Combine several sorted files.
- -M Sort the first 3 letters according to the abbreviation of the month.
- -n Sort according to the magnitude of the value.
- -u means unique (unique), and the output result is finished.
- -o<output file> Save the sorted results to the specified file.
- -r Sort in reverse order.
- -t<separation character> Specifies the field separator character used when sorting.
- +<Start field>-<End field> Sort by the specified field, ranging from the start field to the previous field of the end field.
- --help Display help.
- --version Display version information.
root@iZ2zeckzw4ww9d0umka1vqZ:/home/baichao/linux/shell/sort# cat baichao.txt
c
c++
linux
c#
Mysql
Oracle
linux
root@iZ2zeckzw4ww9d0umka1vqZ:/home/baichao/linux/shell/sort# sort baichao.txt
c
c#
c++
linux
linux
Mysql
Oracle
root@iZ2zeckzw4ww9d0umka1vqZ:/home/baichao/linux/shell/sort# sort -u baichao.txt
c
c#
c++
linux
Mysql
Oracle
root@iZ2zeckzw4ww9d0umka1vqZ:/home/baichao/linux/shell/sort# sort -r baichao.txt
Oracle
Mysql
linux
linux
c++
c#
c
root@iZ2zeckzw4ww9d0umka1vqZ:/home/baichao/linux/shell/sort# sort -r baichao.txt -o baichao.txt
root@iZ2zeckzw4ww9d0umka1vqZ:/home/baichao/linux/shell/sort# cat baichao.txt
Oracle
Mysql
linux
linux
c++
c#
c
There is also a more special case is the number sort
root@iZ2zeckzw4ww9d0umka1vqZ:/home/baichao/linux/shell/sort# cat baichao1.txt
1
111
2
222
3
4
root@iZ2zeckzw4ww9d0umka1vqZ:/home/baichao/linux/shell/sort# sort baichao1.txt
1
111
2
222
3
4
root@iZ2zeckzw4ww9d0umka1vqZ:/home/baichao/linux/shell/sort# sort -n baichao1.txt
1
2
3
4
111
222Sorted files to merge
root@iZ2zeckzw4ww9d0umka1vqZ:/home/baichao/linux/shell/sort# cat baichao.txt
c
c#
c++
linux
linux
Mysql
Oracle
root@iZ2zeckzw4ww9d0umka1vqZ:/home/baichao/linux/shell/sort# cat baichao1.txt
1
2
3
4
111
222
root@iZ2zeckzw4ww9d0umka1vqZ:/home/baichao/linux/shell/sort# sort -m baichao.txt baichao1.txt
1
2
3
4
111
222
c
c#
c++
linux
linux
Mysql
Oracle