Displaying a List of Unique File Names Across Subdirectories in a Site
In this article, we will cover how to display a list of unique file names across subdirectories in a site. This is a common task when managing a website, as it allows you to quickly see all the unique files being used across different directories. We will be using the command line tool ls with the options -R, sort, and uniq to accomplish this task.
The ls command
The ls command is used to list the files and directories in the current directory. By default, it will only list the files and directories in the current directory, but by using the -R option, we can tell it to list the files and directories in all subdirectories as well.
ls -R
This will list all the files and directories in the current directory and all its subdirectories. However, this will include a lot of duplicate file names, as the same file may exist in multiple directories. To remove these duplicates, we can use the sort and uniq commands.
The sort and uniq commands
The sort command is used to sort lines in text files. By default, it sorts the lines in ascending order. We can use it to sort the output of the ls -R command, which will group the same file names together.
ls -R | sort
Now that the same file names are grouped together, we can use the uniq command to remove the duplicates. The uniq command will only print unique lines from a sorted file.
ls -R | sort | uniq
However, this will still not display the file names in reverse order, which is often desired when displaying a list of files. To display the file names in reverse order, we can use the sort command again with the -r option.
ls -R | sort | uniq | sort -r
This will display a list of unique file names across all subdirectories in the current directory, sorted in reverse order.
In this article, we have covered how to display a list of unique file names across subdirectories in a site using the command line tool ls with the options -R, sort, and uniq. This is a useful task when managing a website, as it allows you to quickly see all the unique files being used across different directories.