UNIX for Beginners Questions & Answers

[/X2/WORK/LOG]$
>du -h | egrep '[0-9[0-9]M|[0-9]G|[0-9][0-9]G'
 195M   ./TMP
 3.6M   ./TP_DEC2012
 146G   .

#!/usr/bin/env bash

# @(#) s1       Demonstrate human numeric sort, GNU sort.

# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
LC_ALL=C ; LANG=C ; export LC_ALL LANG
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
em() { pe "$*" >&2 ; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C sort

pe
FILE=${1-data1}

# Display input.
head $FILE

pl " Results, general numeric sort:"
cat $FILE | # simulate du
sort -g -k1,1

pl " Results, human numeric sort:"
cat $FILE | # simulate du
sort -h -k1,1 

exit 0

$ ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 3.16.0-4-amd64, x86_64
Distribution        : Debian 8.9 (jessie) 
bash GNU bash 4.3.30
sort (GNU coreutils) 8.23

 195M   ./TMP
 3.6M   ./TP_DEC2012
 146G   .

-----
 Results, general numeric sort:
 3.6M   ./TP_DEC2012
 146G   .
 195M   ./TMP

-----
 Results, human numeric sort:
 3.6M   ./TP_DEC2012
 195M   ./TMP
 146G

rev=""
if [ $# -gt 0 ]
  then
  if [ $1 = '-r' ]
  then
    rev="r"
#   echo $rev
    shift
  fi
fi
ls -l $* |grep -v "total " |sort +4n$rev -5 +8 |more -e

du -ah "pathname" | sort -n -r | head -n 50