How do I reverse the order of files in Linux?

To sort in reverse order pass the -r option to sort . This will sort in reverse order and write the result to standard output. Using the same list of metal bands from the previous example this file can be sorted in reverse order with the -r option.

How do you reverse the order of lines in a file?

3. nl/sort/cut Commands

  1. 3.1. nl. To be able to order the file in reverse order, we need an index for each row. …
  2. 3.2. sort. Now we want to sort these indexed lines into reverse order, for which we should use sort: …
  3. 3.3. cut.

How do I sort files in Linux?

How to Sort Files in Linux using Sort Command

  1. Perform Numeric Sort using -n option. …
  2. Sort Human Readable Numbers using -h option. …
  3. Sort Months of an Year using -M option. …
  4. Check if Content is Already Sorted using -c option. …
  5. Reverse the Output and Check for Uniqueness using -r and -u options.

How do I list files in descending order?

To list all files and sort them by size, use the -S option. By default, it displays output in descending order (biggest to smallest in size). You can output the file sizes in human-readable format by adding the -h option as shown. And to sort in reverse order, add the -r flag as follows.

How do I reverse the contents of a file?

5 ways to reverse the order of file content

  1. tac command is the reverse of cat. …
  2. This option uses a combination of commands to reverse the file order. …
  3. sed is the most trickiest of all. …
  4. awk solution is a pretty simple one. …
  5. perl solution is pretty simple due to the reverse function of perl.

How do you reverse a text file?

Go to the 1st line in the text file, and press Ctrl + H to launch the Find & Replace dialog. Click Replace All. That’s it. The first five characters are removed.

How do I sort a string in Linux?

Sort lines of a text file

  1. To sort the file in alphabetical order, we can use the sort command without any options:
  2. To sort in reverse, we can use the -r option:
  3. We can also sort on the column. For example, we will create a file with the following text:
  4. Blank space is the default field separator.

How do I list all files in a directory in Linux?

See the following examples:

  1. To list all files in the current directory, type the following: ls -a This lists all files, including. dot (.) …
  2. To display detailed information, type the following: ls -l chap1 .profile. …
  3. To display detailed information about a directory, type the following: ls -d -l .

How do I view files in Linux?

The easiest way to show hidden files on Linux is to use the ls command with the “-a” option for “all”. For example, in order to show hidden files in a user home directory, this is the command that you would run. Alternatively, you can use the “-A” flag in order to show hidden files on Linux.

How do I sort files?

Sort Files and Folders

  1. In the desktop, click or tap the File Explorer button on the taskbar.
  2. Open the folder that contains the files you want to group.
  3. Click or tap the Sort by button on the View tab.
  4. Select a sort by option on the menu. Options.

How do I sort large files in Linux?

2 Answers

  1. Split the big file into small chunks. Use for example the split tool with the -l option. E.g.: …
  2. Sort the smaller files. E.g. for X in small-chunk*; do sort -t’|’ -k2 -nr < $X > sorted-$X; done.
  3. Merge the sorted smaller files. E.g. …
  4. Clean-up: rm small-chunk* sorted-small-chunk*

How do I reverse the order of a file in Unix?

-r Option: Sorting In Reverse Order: You can perform a reverse-order sort using the -r flag. the -r flag is an option of the sort command which sorts the input file in reverse order i.e. descending order by default.

How do I reverse the order of text in a field file?

The idea is to do the following:

  1. For each line move it to line 1 (to reverse). Command is g/^/m0 . …
  2. Print everything. Command is %p . …
  3. Forcefully quit without saving the file. Command is q! .

How do I print the contents of reverse order?

Initialise the array of length of the given message in the given file. Now rewind your file pointer and place the last pointer of the text to arr[K – 1] where K is the length of the array using fseek(). Print the length of the last line and decrease K by 1 for printing the next last line of the file.

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