Linux

xclip is incredibly useful to get and set data from the clipboard!

gopup is to html what jq is to JSON. It allows you to parse html to extract specific data for a given selector.

I mentioned this in another post, but tmux is awesome

yt-dlp

I basically live in nvim. Being able to configure my editor in an actual programming language makes it so much more useful to me than vim could ever be.

fzf for quickly matching file names especially deep in the directory hierarchy

ripgrep for quickly searching for text content within files

dtrx for handling the right extractions of different archive types

• ranger and mc - both are file managers, and their approach is so different that I choose one of them I need at the moment depending on what do I want to do (mc for traditional file management, ranger for looking around the directory tree and peeking into files)
• htop, tmux - classics
• weechat, profanity - for my IM needs
• ripgrep - for searching through files
• magic-wormhole for file and ssh public key exchange
• mosh for when the network conditions aren't ideal
• nmap to see if that machine I've connected into the network is up and what IP did it get
• bat for quick looking into files
• gdb, with mandatory gdb dashboard
• nvim for serious text and code editing, micro for more casual editing

Ranger and/or vifm as file managers. Can't live without them

• gcalcli : helps accessing google calendar using calendar api
• neix : rss reader
• I don't know if it counts but : fish shell

ffmpeg

alsamixer

And on a more devops front k9s https://k9scli.io/

They might have specific uses that most users might not need and there may be better alternatives but some of the ones I've been using are:

CISO - A command line tool for making compressed ISO files that can be used in emulators and some video game consoles running custom firmware.

RAR - The Linux version of WinRAR, which doesn't have a UI like the Windows version does.

Flatpak - Probably well known but in case a newer Linux user sees this, it's used to download and install flatpaks from Flathub.

I have mostly replaced all command line stuff with Emacs, but there are still a few CLI utilities that I continue to use, whether I am in the CLI directly or whether I am using Emacs:

• tmux or screen (terminal multiplexing)
• bash (shell scripting)
• grep, sed (filtering, formatting)
• ps, pgrep, pkill (process control)
• ls, find, du (filesystem search)
• ssh, nc, rsync, sshfs, sftp (remote access, file transfer)
• tee, dd (pipe control)
• less, emacs, diff, patch, pandoc (text editing)
• man, apropos (manual)
• tar, gzip, bzip2, xz (archiving)
• hexdump, base64, basenc, sha256sum (data encoding, checksums)
• wget, curl, (HTTP client)
• dpkg, apt-get, guix (package management)
• mpv (media player)
• ldd, objdump, readelf (inspecting binary files)
• zfs (maintaining my backup filesystem)

i use kibi as a text editor

i also have terminal client called alacritty

also doas instead of sudo

off the top of my head:

• vim
• git
• bash
• make
• whatever-compiler-im-using
• curl
• less
• grep

I am thoroughly enjoying using mcfly.

argos-translate for offline machine language translation.

tmux & neovim for editing files and organizing the terminal displays.

asciinema for recording and playing back terminal sessions.