distro:gentooslackwarefedoracentosopensusedebianraspbianubuntuarchlinuxtinycore
boot:lilogrubsyslinux
init:openrcbsdrcsysVupstartsystemd
packs:slpkgdnfyumaptpacman
tty
base:lsddcatgrepfindsedawk
admin:dumountfdiskipnetstattcpdumpiptables
net:ncsocatsshmoshscprsynclftp
shell:bashzshscreentmuxmcvifmranger
programming:vimgccmakemingwgdbdiffgit
http:wgetw3mmuttirssibitlbeesurfdwbgui
media:alsapulseffmpegqemuwineX11dwm

23 systems ↗

49 tools ↘

72 total

Each 'rectangle' ≈ average
ONE MONTH of learning.

- Learning Linux ≈ 6 years!

Asain Kujovic, 2015.
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