Sort command
The sort command is used to sort files
Sort multiple files at the same time
# sort a.txt b.txt
Sort by number
# sort-n a.txt
Sort in reverse order
# sort-r aa.txt bb.txt
Specify the column to sort (for example: specify the second column to sort)
# sort-k 2 aa.txt bb.txt
Specify the delimiter (for example: with a colon as the delimiter)-- >-t,-- field-separator
# sort-t:-K3-n / etc/passwd
Remove duplicate lines after sorting
# sort-u-n aaa.txt
