Linux Shell Scripting Cookbook - Third Edition

How to do it...

1. We can sort a set of files (for example, file1.txt and file2.txt), like this:

        $ sort file1.txt file2.txt > sorted.txt

 Alternatively, use this:

        $ sort file1.txt file2.txt -o sorted.txt

2. For a numerical sort, we use this:

        $ sort -n file.txt

3. To sort in the reverse order, we use the following command:

        $ sort -r file.txt

4. To sort by months (in the order Jan, Feb, March,...), use this:

        $ sort -M months.txt

5. To merge two already sorted files, use this command:

        $ sort -m sorted1 sorted2

6. To find the unique lines from a sorted file, use this:

        $ sort file1.txt file2.txt | uniq

7. To check whether a file has already been sorted, use the following code:

 #!/bin/bash #Desc: Sort sort -C filename ; if [ $? -eq 0 ]; ...