My own task management system as I couldn't find one that fits my needs. Uses my taskengine library which is found here: https://github.com/scazan/taskengine

Uses a simple json file so it can be consumed via a number of other interfaces (command line, phone, web, etc) . Supports subtasks, deadlines, single subtasks assigned to multiple tasks, and all the normal things a task manager does.

To install, download this repository (or git clone it) into ~/dev/task-cli (if you want to change that directory, just put it anywhere and edit the "task" file which is simply a bash script pointing to the executable):

touch ~/tasks.json
npm install

To use globally, add the directory to your path:

export PATH=/dev/task-cli:$PATH

I've added in a shortcut for task that uses the letter t in place of any reference to task in the following (ie. 't ls' or 't add "name:blah" ')

Listing:

task 
task ls
task ls a
task ls all

Adding:

task add name: some name description:some descriptive text here url: www.duckduckgo.com

// Task properties can also be surrounded with quotes and separated by commas if that is more comfortable (like the following)
task add "name: some name, description: some descriptive text here, url: www.duckduckgo.com"

Sub tasks (for example on task id 8):

task add 8 name: some name description:some descriptive text here url: www.duckduckgo.com
task ls 8

Removing:

task rm 12

Marking complete:

task x 8
task close 8

Editing:

task edit 8 "url: www.duckduckgo.com"