Web & Software Developer

Linux Terminal Commands For Managing Files in Bulk – Cheat Sheet

This is a quick reference cheat sheet for Linux commands to manage files on the command line.

Count the files (including directories) in a directory. This gives you the total number of files.

ls | wc -l 

Count the files in a directory, per each type of extension. This will tell you how many of each type of file there is in a directory. It’s a quick summary and doesn’t list each single file.

find -type f | sed -e 's/.*\.//' | sort | uniq -c 

Count all the files in a directory of one particular extension. This example counts all .jpg files. It will give you the count, but this doesn’t list each file. (The next command lists each file.)

ls | grep '\.jpg$' | wc -l 

List all files of a particular extension in a directory. This example lists all .jpg files.

ls | grep '\.jpg$' 

Compare the contents of two folders with the diff command. This lets you see the difference between 2 folders. This compares just filenames, and not the file contents:

diff <(cd folder1 && find . | sort) <(cd folder2 && find . | sort) 

Find all files in a directory with a specific file size. This example lists specific files that are 50000k or larger:

find -type f -size +50000k -exec ls -lh {} \; | awk '{ print $9 ": " $5 }' 

List all folders in a directory sorted by MegaBytes. This will give the size, in MB, of all folders:

du --max-depth=1 | sort -n | awk 'BEGIN {OFMT = "%.0f"} {print $1/1024,"MB", $2}' 

Bulk rename all files in a folder. This example changes the extension of all files in the directory from .htm to .html

rename 's/\.htm$/\.html/' *.htm 

To do a test run for the line above, add -n after rename. This will not actually change anything. It will show the proposed changes:

rename -n 's/\.htm$/\.html/' *.htm 

More examples of bulk renaming here.

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