wc -c *.* | numfmt --field=1 --to=iec-i --suffix=B --padding=7One useful line
every morning
A single bash one-liner published every weekday, explained flag by flag. The kind of thing you would have worked out eventually, but faster. No accounts, no tracking, no cookies, nothing for sale.
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time du -sh /usrFind out whether a slow command is working or waiting
tail -n +2 sales.csvSkip the header line of a file before you sort or count it
IFS=, read -r date region product units revenue <<< "$(sed -n 2p sales.csv)"; echo "$region $units"Split a line into named variables without losing them to a subshell
git log --oneline main..featureSee which commits are on a branch but not on main
gzip -tv *.gzCheck whether a compressed backup is corrupt before you need it
ls -lsh *.img