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# List the biggest files in a directory
# First optional argument is the directory, defaulting to the
# current dir; second optional argument is the number of files to
# show, defaulting to 20
dir=${1:-.} lines=${2:-10}
# Enter the target dir or bail
cd -- "$dir" || exit
# Add files matching glob, shift them off if unexpanded (first and
# only entry doesn't exist)
set -- *
[ -e "$1" ] || shift
# Add dot files, shift off the "." and ".." entries (sh(1)
# implementations seem to vary on whether they include these)
set -- .* "$@"
[ -e "$1" ] || shift
[ "$1" = . ] && shift
[ "$1" = .. ] && shift
# Run du(1) with POSIX compatible flags -k for kilobyte unit and
# -s for total over the arguments
du -ks -- "$@" |
# Sort the first field (the sizes) numerically, in reverse
sort -k1,1nr |
# Limit the output to the given number of lines
sed "$lines"q
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