Linux

ncdu

yq is crazy cool for converting between different text-based data formats such as yaml, json, xml, csv and others, and it has a super nice pretty-printing function as well. I use it all the time!

Just be aware that your distroy might come with a yq variant too, but possibly one that isn't as powerful as the one I linked. I know this to be true at least for Ubuntu.

Discovered about rg recently and it is cool!

Using rust rewrite of coreutils you can cp -g to see progress. Set an alias :)

motion

After spending years dealing with shady freeware and junk software on windows, I was floored by how easy and nonchalantly I was able to set up a simple security camera on my PC

ip eg:

# ip a
# ip a a 192.168.1.99/24 dev enp160

The first incantation - ip address (you can abbreviate whilst it is unambiguous) gets you a quick report of interfaces, MAC, IPs and so on. The second command assigns another IP address to an interface. Handy for setting up devices which don't do DHCP out of the box or already have an IP and need a good talking to.

Oh and you can completely set up your IP stack, interfaces and routing etc with it. Throw in nft or iptables (old school these days - sigh!) for filtering and other network packet mangling shenanigans.

Underrated? I'd say lftp is the best FTP command line client there is. And Midnight Commander is a very very good file browser. I don't see either praised enough.

Underrated

Both linked projects have over 60k+ stars on GitHub

Pick one

• xargs
• parallel
• PXE (ohai cobbler)
• tee
• task-spooler (ts aka tsp)
• rpm -V

Nothing new, just forgotten.

all of them

CTRL-L to clear your terminal output. Or type clear

I love ncdu for seeing where all my storage is being taken up.

dd is probably well known, but one of the simplest and most powerful ways to accidentally delete all data on your hard drive. dd if=/dev/random of=/dev/sda

I think socat is a really powerful und underrated tool

pipeviewer or pv

tmsu is pretty cool - it creates a little db and uses that to track tags on your files without ever touching them. It also has it's own little tag based filesystem.

vd (VisiData) is a wonderful TUI spreadsheet program. It can read lots of formats, like csv, sqlite, and even nested formats like json. It supports Python expressions and replayable commands.

I find it most useful for large CSV files from various sources. Logs and reports from a lot of the tools I use can easily be tens of thousands of rows, and it can take many minutes just to open them in GUI apps like Excel or LibreOffice.

I frequently need to re-export fresh data, so I find myself needing to re-process and re-arrange it every time, which visidata makes easy (well, easier) with its replayable command files. So e.g. I can write a script to open a raw csv, add a formula column, resize all columns to fit their content, set the column types as appropriate, and sort it the way I need it. So I can do direct from exporting the data to reading it with no preprocessing in between.

Pandoc, FFMpeg, ImageMagick