I'm still somewhat of a novice Linux user. The most helpful tools I have discovered recently is symlinking for linking a file from one location to another. The second tool is Resilio Sync, which allows me to sync files between my home computer and, when combined with symlinks, works for game saves also. The last is Barrier for sharing my keyboard and mouse across my computers. What are your most useful tools?
@Senlis
The most useful tools will vary by typical workload but here's my current list:
cron
{n,}vi{,m}
rc
sh
LLVM
lldb
tmux
nc
openssl
curl
awk
make
tcpdump
nmap
xclip
ssh
ssh-agent
fossil
git
sed
ed
tar
gpg
tip
ip (custom simple ip calculator)