sort(1)
sort [opts] [file]
opts:
-r reverse output
-b ignore leading blanks
-n sort by numeric
-h sort by human numeric
-V sort by version
-k<N> sort by Nth key
-t<S> field separator
Examples
# Sort by directory sizes.
du -sh * | sort -h
# Sort numeric by second key.
# The default key separator is non-blank to blank transition.
echo 'a 4
d 10
c 21' | sort -k2 -n
# Sort numeric by second key, split at comma.
echo 'a,4
d,10
c,21' | sort -k2 -n -t,
Use
--debug
to annotate part of the line used to sort and hence debug the key usage.