To get crazy fast in the command line, try Command Line Challenge, practicelinux.com, learnshell.org and commandlinefu.com. Source: 8 months ago

I put something together very similar to this, https://cmdchallenge.com that I like a bit better because it has console input. There is also a Christmas edition "12 days of shell" https://12days.cmdchallenge.com that is more like a learning progression. - Source: Hacker News / 8 months ago

Nice to see this posted on HN! A while back ago I used them for the design of a site a built https://cmdchallenge.com/ which gives it a nice feel of achievement badges without using standard unicode characters that may look different depending on the client. - Source: Hacker News / 9 months ago

Cmd challenge is a website that gives you a linux terminal, and asks you to perform different tasks on it, so you sharpen your linux terminal skills. - Source: dev.to / over 1 year ago

Aye that's a good one. CmdChallenge is also quite nice. Source: almost 2 years ago

* This is rather a lot of work just to be able to _add tasks on your phone_ while you're away from your desk or even just to sync tasks between what might be two or three desktops, and it's pretty clear they had more of an "enterprise environment" or a hosting service like InThe.AM in mind when they wrote it. Regarding that particular service, it is open-source but "Setting this up locally as a clone of Inthe.AM... - Source: Hacker News / about 2 years ago

2) Save those static "TODO" tabs to a task manager[1] and treat them as tasks. [1]: My one: https://github.com/naggie/dstask/ -- saving the URL in note means I can open the tab in a browser again in a command (open). - Source: Hacker News / about 3 years ago