_exit, exit (2)      - exit a process
access (2)           - determine a users permissions for a file.
agetty - alternative System V/SunOS 4 getty 
alarm (2)            - alarm
apropos (1)          - search the whatis database for strings
basename (1)         - strip directory and suffix from filenames
bash (1)             - GNU Bourne-Again SHell
bc (1)               - An arbitrary precision calculator language
bison (1)            - GNU Project parser generator (yacc replacement)
bit_alloc, bit_clear, bit_decl, bit_ffs, bit_nclear, bit_nset, bit_set, bitstr_size, bit_test (3) - bit-string manipulation macros
break, ftime, gtty, lock, mpx, prof, stty, ustat (2) - these syscalls are unimplemented
brk (2)              - set data segment break
cat (1)              - concatenate files and print on the standard output
chdir (2)            - change working directory
chgrp (1)            - change the group ownership of files
chmod (1)            - change the access permissions of files
chmod, chown (2)     - change permissions, ownership of a file.
chown (1)            - change the user and group ownership of files
chroot (2)           - change root direvtory.
close (2)            - close an open file descriptor
cmp (1)              - compare two files
comm (1)             - compare two sorted files line by line
compress, uncompress, zcat (1) - compress and uncompress files
cp (1)               - copy files
cpio (1)             - copy files to and from archives
creat, open, mkdir, mknod (2) - create or open a file, special file, or directory
crond (8)            - daemon to execute scheduled commands (Vixie Cron)
crontab (1)          - maintain crontab files for individual users
crontab (5)          - tables for driving cron
csplit (1)           - split a file into sections determined by context lines
ctags (1)            - Generates "tags" and (optionally) "refs" files
cut (1)              - remove sections from each line of files
date (1)             - print or set the system date and time
dd (1)               - convert a file while copying it
df (1)               - summarize free disk space
dirname (1)          - strip filename suffix from pathname
du (1)               - summarize disk usage
dup, dup2 (2)        - duplicate fildescriptors
elvis, ex, vi, view, input (1) - The editor
elvprsv (1)          - Preserve the the modified version of a file after a crash.
elvrec (1)           - Recover the modified version of a file after a crash
emacs (1)            - GNU project Emacs
env (1)              - run a program in a modified environment
execve (2)           - execute program
expand (1)           - convert tabs to spaces
expr (1)             - evaluate expressions
find (1)             - search for files in a directory hierarchy
flex (1)             - fast lexical analyzer generator
fm, nroff, tex (1)   - a simple text formatter
fmt (1)              - adjust line-length for paragraphs of text
fold (1)             - wrap each input line to fit in specified width
fork (2)             - create a child process
gawk (1)             - pattern scanning and processing language
gcc, g++ (1)         - GNU project C and C++ Compiler (v2 preliminary)
getgroups, setgroups (2) - get/set groups
getopt (3)           - get option letter from argv
getpid, getuid, getgid, getgid, geteuid, getegid, getppid, getpgrp, setpgid, setuid, setgid, setsid, setreuid, setregid. (2) - get and set process ownership information.
getrlimit, getrusage, setrlimit (2) - get/set resource limits and usage
gettimeofday, time, settimeofday, stime (2) - get / set time
grep, egrep (1)      - print lines matching a regular expression
groups (1)           - print the groups a user is in
head (1)             - output the first part of files
id (1)               - print real and effective UIDs and GIDs
install (1)          - copy files and set their attributes
join (1)             - join lines of two files on a common field
kill (2)             - kill a process.
less (1)             - opposite of more
lesskey (1)          - specify key bindings for less
link, rmdir, symlink, unlink (2) - create, remove, rename hard and soft links
ln (1)               - make links between files
locate (1)           - list files in a database that match a pattern
logname (1)          - print user's login name
ls, dir, vdir (1)    - list contents of directories
lseek (2)            - seek in a file
make (1)             - GNU make utility to maintain groups of programs
man (1)              - format and display the on-line manual pages
manpath (1)          - determine user's search path for man pages
mkdir (1)            - make directories
mkfifo (1)           - make FIFOs (named pipes)
mknod (1)            - make special files
mount, umount (2)    - mount and unmount filesystems.
mv (1)               - rename files
nice (1)             - run a program with modified scheduling priority
nice (2)             - change process priority.
nl (1)               - number lines of files
nohup (1)            - run a command immume to hangups, with output to a non-tty
paste (1)            - merge lines of files
patch (1)            - a program for applying a diff file to an original
pathchk (1)          - check whether pathnames are valid or portable
pause (2)            - wait for signal
pfdisk (8)           - partition fixed disk
pipe (2)             - create pipe
pr (1)               - convert text files for printing
printenv (1)         - print all or part of environment
printf (1)           - format and print data
ps (1)               - display processes
read, write (2)      - read / write syscalls
readlink (2)         - read value of link
reboot (2)           - reboot or disable CNTRL - ALT - DEL
ref (1)              - Display a C function header
rm (1)               - remove files
rmdir (1)            - remove empty directories
sethostname (2)      - sethostname
setup (2)            - initialize the ST506 hd driver drive and partition parameters
signal, sigaction, sigsuspend, sigpending, sgetmask, ssetmask (2) - signal handling functions.
sleep (1)            - delay for a specified amount of time
sort (1)             - sort lines of text files
split (1)            - split a file into pieces
stat, fstat, lstat (2) - grab inode information.
stty (1)             - change and print terminal line settings
sum (1)              - checksum and count the blocks in a file
swapon (2)           - set swap file/device.
sync (2)             - commit buffer cache to disk.
tac (1)              - concatenate and print files in reverse
tail (1)             - output the last part of files
tee (1)              - read from standard input and write to standard output and files
test (1)             - check file types and compare values
times (2)            - return elapsed process times.
touch (1)            - change file timestamps
tr (1)               - translate or delete characters
tty (1)              - print the path of the terminal connected to standard input
umask (2)            - set file creation mask.
uname (1)            - print system information
uname (2)            - return system information.
undocumented, ptrace, ioctl, fcntl, select (2) - currently undocumented
unexpand (1)         - convert spaces to tabs
uniq (1)             - remove duplicate lines from a sorted file
uselib (2)           - select shared library.
utime (2)            - change access and/or modification times of an inode.
waitpid (2)          - wait for a given pid
wc (1)               - print the number of bytes, words, and lines in files
whatis (1)           - search the whatis database for complete words.
whoami (1)           - print effective userid
xargs (1)            - build and execute command lines from standard input
yes (1)              - output a string repeatedly until killed
zmore (1)            - file perusal filter for crt viewing of compressed text