find all 2 character unix utilities in PATH

find all 2 character unix utilities in PATH.sh

# get all 2 char unix utilities
for i in /usr/local/sbin /usr/local/bin /usr/sbin /usr/bin /sbin /bin ; do find $i >> qq ; done
while read i; do basename $i >> qq.basename ; done < qq
cat qq.basename |sort|uniq|grep  -w '^\w\{2\}$' > qq.basename.sort.2
# print man description
while read i; do man -f $i >> qq.basename.sort.2.man ; done < qq.basename.sort.2

7z (1)               - A file archiver with highest compression ratio
ar (1)               - create, modify, and extract from archives
as (1)               - the portable GNU assembler.
bc (1)               - An arbitrary precision calculator language
cc (1)               - GNU project C and C++ compiler
cp (1)               - copy files and directories
dd (1)               - convert and copy a file
df (1)               - report file system disk space usage
dh (1)               - debhelper command sequencer
du (1)               - estimate file space usage
ed (1)               - line-oriented text editor
ex (1)               - Vi IMproved, a programmers text editor
gs (1)               - Ghostscript (PostScript and PDF language interpreter a...
hd (4)               - MFM/IDE hard disk devices
hd (1)               - ASCII, decimal, hexadecimal, octal dump
hg (1)               - Mercurial source code management system
id (1)               - print real and effective user and group IDs
ip (8)               - show / manipulate routing, devices, policy routing and...
ip (7)               - Linux IPv4 protocol implementation
ld (1)               - The GNU linker
ln (1)               - make links between files
lp (4)               - line printer devices
lp (1)               - print files
ls (1)               - list directory contents
lz (1)               - gunzips and shows a listing of a gzip'd tar'd archive
m4 (1)               - macro processor
mc (1)               - Visual shell for Unix-like systems.
mt (1)               - control magnetic tape drive operation
mv (1)               - move (rename) files
nc (1)               - arbitrary TCP and UDP connections and listens
nl (1)               - number lines of files
nm (1)               - list symbols from object files
od (1)               - dump files in octal and other formats
pg (1)               - browse pagewise through text files
pr (1)               - convert text files for printing
ps (1)               - report a snapshot of the current processes.
pv (1)               - monitor the progress of data through a pipe
ri (1)               - Ruby API reference front end
rm (1)               - remove files or directories
sg (1)               - execute command as different group ID
sh (1)               - command interpreter (shell)
ss (8)               - another utility to investigate sockets
su (1)               - change user ID or become superuser
tc (8)               - show / manipulate traffic control settings
tr (1)               - translate or delete characters
ul (1)               - do underlining
uz (1)               - gunzips and extracts a gzip'd tar'd archive
vi (1)               - Vi IMproved, a programmers text editor
wc (1)               - print newline, word, and byte counts for each file
xz (1)               - Compress or decompress .xz and .lzma files