macOS

macOS - Finder Rename option for multiple files macOS

How To Rename Multiple Files Using macOS

There’s an easy way to rename multiple files using finder in macOS Since the Yosemite release of Mac OS X (now called macOS) the Finder application (Mac’s equivalent of Windows File Explorer) has a powerful feature that lets you easily rename multiple files. Historically, renaming more than one file at a time required a custom script or a 3rd party add-on program. This new…

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csplit command

Let’s say you have a single file (a mysql dump) containing the output of multiple database backups… and you want to split them out into individual files. Input fil: # MySQL dump 7.1 # # Host: localhost Database: Purchase_Tracking # … Lots of CREATE TABLE and INSERTS … # MySQL dump 7.1 # # Host: localhost Database: Test # … Lots of CREATE TABLE…

Using rarcrack on Ubuntu

Rarcrack is an open source rar file password cracker.  Use it when you’ve forgotten the password you put on a rar or zip file.  The current version (0.2) doesn’t work flawlessly on Ubuntu, so follow these steps. 1. Download the source: wget http://downloads.sourceforge.net/project/rarcrack/rarcrack-0.2/%5BUnnamed%20release%5D/rarcrack-0.2.tar.bz2 2. Un tar tar -xjf rarcrack-0.2.tar.bz2 3. Change directory cd rarcrack-0.2 4. Type make, hit enter.  You will likely receive an…

BASH script to remove numeric prefix from files downloaded from scribd

Scribd is a great service, offering PDF downloads of a variety of content.  Unfortunately there is an ugly 8 digit (random?) number prefixed on each file downloaded. 47432750-Book-Name-Whatever.pdf 47501680-Another-Book-Name.pdf 47502885-Yet-Another-Book-Name.pdf It’s not descriptive, and it makes alphabetic sorting of the files downloaded impossible.  Here’s a small BASH shell script that will remove the first 9 characters (8 digits and the – character) from all…

Combine multiple PDFs into a single file on Linux

One of the great features of the iPhone is the ability to load PDF files into the iBooks application… why lug paper around when you can have a huge amount of reading material right on your phone? One of the challenges of this is that many freely available materials come as 1 chapter per PDF file: Linux Device Drivers is just one example.  The…