Rename to lowercase linux

How to Rename All Files to Lowercase or Uppercase in Linux

Sometimes you may need to rename files to lowercase or uppercase in Linux. In this article, we will learn how to do this. There are several ways to rename files & folders. We will look at one of them using find, rename and xargs function. It is simple and easy to use.

How to Rename All Files to Lowercase or Uppercase in Linux

We will look at simple way to rename all files to lowercase in Linux. Let us say you have the following folder /data

file1.txt /Files/File2.txt FILE3.txt

Rename Files to Lowercase using find, rename and xargs

We will rename function for renaming files as rename function allows you to rename multiple files & folders at once. It also has shortcuts to directly rename files & folders as lowercase or uppercase. First, we will use find function to get a list of all files & subfolders in our target folder.

$ find -depth /data file1.txt FILE3.txt /Files/File2.txt /Files data

We use -depth option to get an exhaustive list of all files & folders in our target location. Also, it lists each folder & subfolder’s contents before it lists the folder or subfolder itself.

We pipe the above output to xargs command which will construct separate rename command for each file and folder in our target folder.

$ find /data -depth | xargs -n 1 rename -v 's/(.*)\/([^\/]*)/$1\/\L$2/' <> \; file1.txt renamed as file1.txt FILE3.txt renames as file3.txt /Files/File2.txt renamed as /Files/file2.txt /Files renamed as /files

As you can see above, it renames the files in each folder before renaming the folder itself. In the above command, -n1 is used to instruct xargs to use at most 1 argument per line of input. We also use $1 to indicate existing filename and L$2 to specify to rename existing filename to lowercase.

If you only want to rename folders and not files, you can add -type d option in find command.

$ find /data -depth -type d | xargs -n 1 rename -v 's/(.*)\/([^\/]*)/$1\/\L$2/' <> \; /Files renamed as /files

If you only want to rename files and not folders use -type f option in find command.

$ find /data -depth -type f | xargs -n 1 rename -v 's/(.*)\/([^\/]*)/$1\/\L$2/' <> \; file1.txt renamed as file1.txt FILE3.txt renames as file3.txt /Files/File2.txt renamed as /Files/file2.txt

Rename to Uppercase using find, rename & xargs

Similarly, you can rename files & folders to uppercase, by simply replacing L$2 with U$2 (L for lowercase and U for uppercase) in the above commands.

$ find /data -depth | xargs -n 1 rename -v 's/(.*)\/([^\/]*)/$1\/\U$2/' <> \; file1.txt renamed as FILE1.txt FILE3.txt renames as FILE3.txt /Files/File2.txt renamed as /Files/FILE2.txt /Files renamed as /FILES

If you only want to rename folders and not files, you can add -type d option to find command.

$ find /data -depth -type d | xargs -n 1 rename -v 's/(.*)\/([^\/]*)/$1\/\U$2/' <> \; /Files renamed as /FILES

If you only want to rename files and not folders use -type f option in find command.

$ find /data -depth -type f | xargs -n 1 rename -v 's/(.*)\/([^\/]*)/$1\/\U$2/' <> \; file1.txt renamed as FILE1.txt FILE3.txt renames as FILE3.txt /Files/File2.txt renamed as /Files/FILE2.txt

In this article, we have learnt how to rename to lowercase or uppercase in Linux.

Источник

Rename All Files and Directory Names to Lowercase in Linux

In our previous article, we have described how to count the number of files and subdirectories inside a given directory. This guide will show you how to rename all files and directories names to lowercase in Linux.

There are several ways to achieve this, but we’ll explain two of the most efficient and reliable methods. For the purpose of this guide, we have used a directory named Files which has the following structure:

1. Using find, xargs and rename Commands Together

rename is a simple command line utility for renaming several files at once in Linux. You can use it together with find utility to rename all files or subdirectories in a particular directory to lowercase as follows:

$ find Files -depth | xargs -n 1 rename -v 's/(.*)\/([^\/]*)/$1\/\L$2/' <> \;

Explanation of options used in the above command.

• -depth – lists each directory’s contents before the directory itself.
• -n 1 – instructs xargs to use at most one argument per command line from find output.

Sample output after renaming files and subdirectories to lowercase in Files directory.

Another alternative way using the find and mv commands in a script as explained below.

2. Using find and mv Commands in Shell Script

First create your script (you can name it anything you prefer):

Then add the code below in it.

#!/bin/bash #print usage if [ -z $1 ];then echo "Usage :$(basename $0) parent-directory" exit 1 fi #process all subdirectories and files in parent directory all="$(find $1 -depth)" for name in $; do #set new name in lower case for files and directories new_name="$(dirname "$")/$(basename "$" | tr '[A-Z]' '[a-z]')" #check if new name already exists if [ "$" != "$" ]; then [ ! -e "$" ] && mv -T "$" "$"; echo "$ was renamed to $" || echo "$ wasn't renamed!" fi done echo echo #list directories and file new names in lowercase echo "Directories and files with new names in lowercase letters" find $(echo $1 | tr 'A-Z' 'a-z') -depth exit 0

Save and close the file, then make the script executable and run it:

$ chmod +x rename-files.sh $ rename-files.sh Files #Specify Directory Name

You may also like to read these following related articles.

In this guide, we expalined you how to rename all files and directories to lowercase in Linux. If get any errors, please hit us up via the feedback form below. You can as well offer us any other methods of doing the same.

Источник

Batch rename files to lowercase

Is there a way to rename all files in a directory to lowercase|uppercase? I am looking for a oneliner command. I loved TotalCommander’s Alt + F7 , now I need that functionality in the Terminal.

4 Answers 4

For each file a_file in current directory rename a_file to lower case.

for a_file in *;do mv -v "$a_file" `echo "$a_file" | tr [:upper:] [:lower:]` ;done; 

For upper case reverse the arguments to [:lower:] [:upper:]

For even more control * can be replaced with ls .

For example in a directory containing 1.txt, 2.txt, 3.txt, 1.jpg, 2.jpg and 3.jpg in order to filter only *.jpg files, ls can be used:

for a_file in $(ls *.jpg);do mv -v $a_file `echo $a_file | tr [:upper:] [:lower:]` ;done; 

The above code will assign to a_file variable all files with .jpg extension.

Update added -v option to mv command as per sds suggested.

you might want to pass «-v» to mv so that you see what is being done; you might not want to pass «-f» because this may clobber existing files

Sorry, but the part about ls *jpg is a bad idea. mywiki.wooledge.org/ParsingLs You can achive the same result with *jpg along where you had * in the first place.

There’s a more elegant and general utility called prename .

Written by Larry Wall, it comes with perl so it is most likely already available on your system as /usr/bin/prename (if you have setup alternatives is may also be available as /usr/bin/rename symlinked via /etc/alternatives to prename )

Using it you can rename multiple files in one command by providing any perl expression (including but not limited to substitution s/// or char transliteration tr/// ):

# Lowercase all *.JPG filenames: prename tr/A-Z/a-z/ *.JPG # Change any 'No' in a filename to a 'Yes': prename s/No/Yes/g *No* # increment first sequence of digits in a filename by 3: prename 's/(9+)/$1+3/e' *5* # If a file contains 'aaa', append '.bak' to its name prename 'if (/aaa/) ' * 

Another nice thing about prename is that it protects you, in the case of renaming a file to an existing file name.

man prename for more details.

Источник

Renaming files from upper case to lower case

I need to elaborate a little bit more. These commands are actually for a BBS FTN tosser. The configuration file for which these commands reside in, only allow specific declarations. Here are a few examples:

exec "/home/imp/imp/poll.sh" *.su? *.mo? *.tu? *.we? *th? *.fr? *.sa? *.pkt flag toss!.now [0-9a-Z][0-9a-Z][0-9a-Z][0-9a-Z][0-9a-Z][0-9a-Z][0-9a-Z][0-9a-Z]. exec "/home/imp/imp/poll.sh /home/imp/hpt/secure" /home/imp/hpt/secure/*.[STFWMstfWM][ouaherOUAHER][0-9A-ZA-a] *.[pP][kK][tT] 

So that’s why I want to use that syntax ([0-9a-z] (for example)). The problem is that the mailer is looking for lowercase filenames, but only uppercase filenames exist. I’m trying to convert a file from uppercase to lowercase using the syntax below:

mv /home/imp/hpt/outbound/[0-9A-Z][0-9A-Z][0-9A-Z][0-9A-Z][0-9A-Z][0-9A-Z][0-9A-Z][0-9A-Z].[STFWMfWM][OUAHER]3 /home/imp/hpt/outbound/[0-9a-z][0-9a-z][0-9a-z][0-9a-z][0-9a-z][0-9a-z][0-9a-z][0-9a-z].[stfwm][ouaher][0-9a-za-a] 

I don’t think I have the syntax correct. Here’s an example of a file name I want to rename: 0000FE70.FR0 Any and all help is greatly appreciated. Thanks.

7 Answers 7

Whenever you want to change one class of characters into another, use tr .

for f in *; do test -f "$f" && echo mv "$f" "$( tr '[:upper:]' '[:lower:]'  

for f in *; do test -f "$f" && echo mv "$f" "$" done 

 find my_root_dir -type f -execdir rename 'y/A-Z/a-z/' <> \;