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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.