		Shell commands

adb		- invoke debugger.
as		- invoke assembler.
at		- execute commands at at later time.
cat		- catanate and print.
cc		- invoke the C compiler.
cd		- change working directory.
chmod	- change mode of file.
cp		- copy.
date	- print/set date.
dc		- desk calculator.
df		- print number of free blocks on disk.
echo	- echo arguments.
fcopy	- copy floppy disks.
file	- determine file type.
find	- find file(s).
grep	- search a file for a pattern.
kill	- terminate a process 'with extreme prejudice'.
ld		- invoke loader.
lint	- C program verifier.
ln		- create a link.
login	- sign on.
ls		- list contents of directory.
mail	- send or receive mail among users.
man		- print section(s) of XENIX manual.
mkdir	- create a directory.
mv		- move/rename files and directories.
nice	- run a command at low priority.
od		- octal dump.
passwd	- change login password.
pr		- (formatted) print file.
printenv - display all or a given system var.
ps		- process status.
pwd		- print working directory name.
reset	- reset term to standard term.
rm		- remove/unlink file(s).
rmdir	- remove directory(s).
script	- create session log file.
sh		- invoke shell command line processor.
size	- print size of an object file.
spell	- find spelling errors.
split	- split a file into pieces.
stty	- set/display terminal options.
tabs	- set terminal tabs.
tee		- pipe fitting.
time	- time a command.
touch	- update date last modified of a file.
tpr		- line printer spooler.
tr		- translate characters.
tra		- show file as it grows.
sort	- sort/merge files(s)
tty		- get terminal name.
wall	- write to all users (broadcast message).
who		- who is on the system.
write	- write to another user.

  ** utilites & other cmds **
initfd	- initialize (format) floppy.
ctags	- create x-ref
find	- find files
leave	- reminder to leave.
more,page	- file perusal.
see		- Display file with control chars.
exec	- exec (don't fork) the args.
