 powerd (8)          - monitor a serial line connected to an UPS. powerd -- monitor a serial line connected to an UPS.
/usr/lib/smail/* (5) - configuration files used by smail
C-Kermit 5A(189) (1) - communications software for serial and network connections: file transfer, terminal connection, character-set translation, and script programming
GNU as--the portable GNU assembler. 
Internet File Transfer Protocol server 
Mtools (5)           - a collection of tools for manipulating MSDOS files
_exit (2)            - terminate the current process
abort (3)            - cause abnormal program termination
abs (3)              - computes the absolute value of an integer.
accept (2)           - accept a connection on a socket
access (2)           - check user's permissions for a file
acct (2)             - switch process accounting on or off
acos (3)             - arc cosine function
acosh (3)            - inverse hyperbolic cosine function
addftinfo (1)        - add information to troff font files for use with groff
adjust_clock (9)     - Adjusts startup time counter to tick in GMT
afmtodit (1)         - create font files for use with groff -Tps
alarm (2)            - set an alarm clock for delivery of a signal
alloca (3)           - memory allocator
apropos (1)          - search the whatis database for strings
arch (1)             - print machine architecture
ascii (7)            - the ASCII character set
asctime, ctime, gmtime, localtime, mktime (3) - transform binary date and time to ASCII
asin (3)             - arc sine function
asinh (3)            - inverse hyperbolic sine function
assert (3)           - Abort the program if assertion is false.
atan (3)             - arc tangent function
atan2 (3)            - arc tangent function of two variables
atanh (3)            - inverse hyperbolic tangent function
atexit (3)           - register a function to be called at normal program termination.
atof (3)             - convert a string to a double.
atoi (3)             - convert a string to an integer.
atol (3)             - convert a string to a long integer.
badblocks (8)        - search a device for bad blocks
banner (6)           - print large banner on printer
basename (1)         - strip directory and suffix from filenames
bash (1)             - GNU Bourne-Again SHell
bcmp (3)             - compare byte strings
bcmp, bcopy, bzero, memccpy, memchr, memcmp, memcpy, memfrob, memmem,  memmove, memset (3)  - byte string operations
bcopy (3)            - copy byte strings
bind (2)             - bind a name to a socket
bison (1)            - GNU Project parser generator (yacc replacement)
break, stty, gtty, prof, ulimit, setsid, siggetmask, sigsetmask, socketcall, klog, sigreturn, clone, syslog (2) - undocumented system call
brik (1)             - calculate 32-bit CRC
brk, sbrk (2)        - change data segment size
bsearch (3)          - binary search of a sorted array.
bzero (3)            - write zeros to a byte string
calloc, malloc, free, realloc (3) - Allocate and free dynamic memory
cat (1)              - concatenate files and print on the standard output
cccp, cpp (1)        - The GNU C-Compatible Compiler Preprocessor.
ceil (3)             - smallest integral value not less than x
chattr (1)           - change file attributes on a Linux second extended file system
chdir (2)            - change working directory
checkalias (1)       - check to see if an alias is defined.
checkerr (8)         - check for serious errors encountered by smail
chgrp (1)            - change the group ownership of files
chmod (1)            - change the access permissions of files
chmod, fchmod (2)    - change permissions of a file
chown (1)            - change the user and group ownership of files
chown, fchown (2)    - change ownership of a file
chroot (2)           - change root directory
chroot (8)           - change root directory and execute a program there
chsh (1)             - change shell in password file
cksum (1)            - checksum and count the bytes in a file
clearerr, feof, ferror, fileno (3) - check and reset stream status
clock (3)            - Determine processor time
clock (8)            - manipulate the CMOS clock
close (2)            - close a file descriptor
closedir (3)         - close a directory
cmp (1)              - compare two files
comm (1)             - compare two sorted files line by line
compress, uncompress, zcat (1) - compress and uncompress files
configuration file 
confstr (3)          - get configuration dependent string variables
connect (2)          - initiate a connection on a socket
console (4)          - console terminal
copysign (3)         - copy sign of a number
cos (3)              - cosine function
cosh (3)             - hyperbolic cosine function
cp (1)               - copy files
cpio (1)             - copy files to and from archives
csplit (1)           - split a file into sections determined by context lines
ctags (1)            - Generates "tags" and (optionally) "refs" files
ctags -- generate tag file for vi 
ctermid (3)          - get controlling terminal name
ctrl_alt_del (9)     - routes the keyboard interrupt ctrl-alt-del  key sequence
ctrlaltdel (8)       - set the function of the Ctrl-Alt-Del combination
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
debugfs (8)          - ext2 file system debugger
df (1)               - summarize free disk space
difftime (3)         - calculate time difference
dirdump (8)          - dump a directory on a mounted Linux second extended file system
dirname (1)          - strip filename suffix from pathname
div (3)              - computes the quotient and remainder of integer division
dmesg (8)            - print or control the kernel ring buffer
domainname (1)       - set or print domain of current host
doshell (8)          - Execute a program on a new tty
drand48, erand48, lrand48, nrand48, mrand48, jrand48, srand48, seed48, lcong48 (3)          - generate uniformly distributed pseudo-random numbers
drem (3)             - floating-point remainder function
du (1)               - summarize disk usage
dumpe2fs (8)         - dump filesystem information
dumpkeys (1)         - dump keyboard translation tables
dup, dup2 (2)        - duplicate a file descriptor
echo (1)             - display a line of text
ecvt, fcvt (3)       - convert a floating-point number to a string.
ed, red (1)          - text editor
elm (1)              - an interactive mail system
elmalias (1)         - expand and display Elm address aliases
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
environ (5)          - user environment
erf, erfc (3)        - error function and complementary error function
etags -- generate tag file for Emacs 
execl, execlp, execle, exect, execv, execvp (3) - execute a file
execve (2)           - execute program
exit (3)             - cause normal program termination
exp, log, log10, pow (3) - exponential, logarithmic and power functions
expand (1)           - convert tabs to spaces
expr (1)             - evaluate expressions
fabs (3)             - absolute value of floating-point number
false (1)            - do nothing, unsuccessfully
fastmail (1)         - quick batch mail interface to a single address
fclose (3)           - close a stream
fcntl (2)            - manipulate file descriptor
fd (4)               - floppy disk devive
fdformat (8)         - Low-level formats a floppy disk
fdisk (8)            - Partition table manipulator for Linux
fflush, fpurge (3)   - flush a stream
ffs (3)              - find first bit set in a word
fgetc, fgets, getc, getchar, gets, ungetc (3) - input of characters and strings
fgetgrent (3)        - get group file entry
fgetpos, fseek, fsetpos, ftell, rewind (3) - reposition a stream
fgetpwent (3)        - get password file entry
file (1) - determine file type
file transfer program 
file_table (9)       - detailed description of the table and table entry
file_table_init (9)  - initializes the file table in the kernel
filesystems (9)      - details the table of configured file systems
filter (1)           - filter incoming messages before adding to mailbox
find (1)             - search for files in a directory hierarchy
flex (1)             - fast lexical analyzer generator
flexdoc (1)          - documentation for flex, fast lexical analyzer generator
flock (2)            - apply or remove an advisory lock on an open file
floor (3)            - largest integral value not greater than x
fmod (3)             - floating-point remainder function
fmt (1)              - adjust line-length for paragraphs of text
fnmatch (3)          - match filename or pathname
fold (1)             - wrap each input line to fit in specified width
fopen, fdopen, freopen (3) - stream open functions
fork, vfork (2)      - create a child process
fpathconf, pathconf (3) - get configuration values for files
fputc, fputs, putc, putchar, puts (3) - output of characters and strings
frag (8)             - simple fragmentation checker
fread, fwrite (3)    - binary stream input/output
free (1)             - Display amount of free and used memory in the system
frexp (3)            - convert floating-point number to fractional and integral components
frm,nfrm (1)         - list from and subject of selected messages in mailbox or folder
fsck (8)             - check and repair a Linux file system
fsck.ext2 (8)        - check a Linux second extended file system
fsck.minix (8)       - a file system consistency checker for Linux
fstab (5)            - static information about the filesystems
fsync (2)            - synchronize a file's in-core state with that on disk
ftime (3)            - return date and time
ftok (3)             - convert a pathname and a project identifier to a System V IPC key
ftw (3)              - file tree walk
fuser (1)            - identify processes using files
g++ (1)              - GNU project C++ Compiler (v2.4)
gawk (1)             - pattern scanning and processing language
gcc, g++ (1)         - GNU project C and C++ Compiler (v2.4)
gcvt (3)             - convert a floating-point number to a string.
gdb (1)              - The GNU Debugger
geqn (1)             - format equations for troff
get_empty_filp (9)   - fetches an unreferenced entry from the file table
getcwd, get_current_dir_name, getwd (3) - Get current working directory
getdirentries (3)    - get directory entries in a filesystem independent format
getdomainname, setdomainname (2) - get/set domain name
getdtablesize (2)    - get descriptor table size
getenv (3)           - get an environment variable
getgid, getegid (2)  - get group identity
getgrent, setgrent, endgrent (3) - get group file entry
getgrnam, getgrgid (3) - get group file entry
getgroups, setgroups (2) - get/set group access list
gethostbyname, gethostbyaddr, sethostent, endhostent, herror (3) - get network  host entry
gethostid, sethostid (2) - get or set the unique identifier of the current host
gethostname, sethostname (2) - get/set host name
getitimer, setitimer (2) - get or set value of an interval timer
getmap (8)           - unshar USENET map articles into a map directory
getmntent, setmntent, addmntent, endmntent, hasmntopt (3) - get file system descriptor file entry
getnetent, getnetbyname, getnetbyaddr, setnetent, endnetent (3) - get network entry 
getopt (3)           - Read command line options
getpagesize (2)      - get system page size
getpass (3)          - get a password
getpeername (2)      - get name of connected peer
getpid, getppid (2)  - get process identification
getpriority, setpriority (2) - get/set program scheduling priority
getprotoent, getprotobyname, getprotobynumber, setprotoent, endprotoent (3)      - get protocol entry
getpw (3)            - Re-construct password line entry
getpwent, setpwent, endpwent (3) - get password file entry
getpwnam, getpwuid (3) - get password file entry
getrlimit, getrusage, setrlimit (2) - get/set resource limits and usage
getservent, getservbyname, getservbyport, setservent, endservent (3) - get service entry 
getsockname (2)      - get socket name
getsockopt, setsockopt (2) - get and set options on sockets
gettimeofday, settimeofday (2) - get / set time
getty (1)            - sets terminal mode, speed, and line discipline
getty (8)            - alternative System V/SunOS 4 getty
gettydefs (5)        - speed and tty settings used by getty
getuid, geteuid (2)  - get user identity
getusershell, setusershell, endusershell (3) - get legal user shells
gindxbib (1)         - make inverted index for bibliographic databases
glob, globfree (3)   - find pathnames matching a pattern, free memory from glob()
glookbib (1)         - search bibliographic databases
gnroff (1)           - emulate nroff command with groff
gpic (1)             - compile pictures for troff or TeX
grefer (1)           - preprocess bibliographic references for groff
grep, egrep, fgrep (1) - print lines matching a pattern
grodvi (1)           - convert groff output to TeX dvi format
groff (1)            - front end for the groff document formatting system
groff_char (7)       - groff character names
groff_font (5)       - format of groff device and font description files
groff_me (7)         - groff macros for formatting papers
groff_me (7)         - troff macros for formatting papers
groff_mm (7)         - groff mm macros
groff_ms (7)         - groff ms macros
groff_out (5)        - groff intermediate output format
grog (1)             - guess options for groff command
grops (1)            - PostScript driver for groff
grotty (1)           - groff driver for typewriter-like devices
group (5)            - user group file
groups (1)           - print the groups a user is in
grow_files (9)       - adds entries to the file table
gsoelim (1)          - interpret .so requests in groff input
gtbl (1)             - format tables for troff
gtroff (1)           - format documents
gzexe (1)            - compress executable files in place
gzip, gunzip, zcat (1) - compress or expand files
halt, reboot (8)     - stop the system. }}} {{{ Synopsis
hd (4)               - MFM/IDE hard disk devive
head (1)             - output the first part of files
hier (7)             - Description of the file system hierarchy
host (1)             - look up host names using domain server
hostname (1)         - show or set the system's host name
hostname (7)         - host name resolution description
htonl, htons, ntohl, ntohs (3) - convert values between host and network byte order
hypot (3)            - Euclidean distance function
id (1)               - print real and effective UIDs and GIDs
idle (2)             - make process idle
ifconfig (8)         - configure a network interface
iflink (8)           - link a device driver to a network interface
ifsetup (8)          - configure a device driver
in_group_p (9)       - searches group IDs for a match
index, rindex (3)    - locate character in string
inet_addr, inet_network, inet_ntoa, inet_makeaddr, inet_lnaof,  inet_netof (3)       - Internet address manipulation routines
infnan (3)           - deal with infinite or not-a-number (NaN) result
info (1)             - GNU's hypertext system
init, telinit (8)    - process control initialization }}} {{{ Synopsis
initgroups (3)       - initialize the supplementary group access list
inittab (5)          - format of the inittab file used by the SysV-compatible init process }}} {{{ Description
insert_file_free (9) - adds a file entry into the file table
install (1)          - copy files and set their attributes
into (2)             - Introduction to system calls
intro (1)            - Introduction to user commands
intro (3)            - Introduction to library functions
intro (4)            - Introduction to special files
intro (5)            - Introduction to file formats
intro (6)            - Introduction to games
intro (7)            - Introduction to miscellany section
intro (8)            - Introduction to administration and privileged commands
ioctl (2)            - control device
ioperm (2)           - set port input/output permissions
iopl (2)             - change I/O privilege level
ipc (5)              - System V interprocess communication mechanisms
ipcs (8)             - provide information on ipc facilities
isalnum, isalpha, iscntrl, isdigit, isgraph, islower, isprint, ispunct, isspace, isupper, isxdigit (3) - character classification routines
isatty (3)           - does this descriptor refer to a terminal
isinf, isnan, finite (3) - test for infinity or not-a-number (NaN)
issue (5)            - issue identification file
j0, j1, jn, y0, y1, yn (3) - Bessel functions
join (1)             - join lines of two files on a common field
kdbrate (8)          - reset the keyboard repeat rate and delay time
kernel_mktime (9)    - convert startup struct mktime into the number of seconds since 00:00:00 January 1, 1970
keytables (5)        - keyboard table descriptions for loadkeys and dumpkeys
kill (1)             - terminate a process with extreme prejudice
kill (2)             - send signal to a process
killall (1)          - kill processes by name
killpg (2)           - send signal to a process group
killpg (3)           - send signal to all members of a process group.
labs (3)             - computes the absolute value of a long integer.
last, lastb (1)      - show listing of last logged in users }}} {{{ Synopsis
ld.so (8)            - dynamic linker/loader
ldconfig (8)         - determine run-time link bindings
ldd (1)              - print shared library dependencies
ldexp (3)            - multiply floating-point number by integral power of 2
ldiv (3)             - computes the quotient and remainder of long integer division.
less (1)             - opposite of more
lesskey (1)          - specify key bindings for less
lgamma (3)           - log gamma function
link (2)             - make a new name for a file
listalias (1)        - list user and system aliases
listen (2)           - listen for connections on a socket
lkbib (1)            - search bibliographic databases
ll, ls, lsf, dir, vdir (1) - list contents of directories
ln (1)               - make links between files
loadkeys (1)         - load keyboard translation tables
locale (7)           - Description of multi-language support
localeconv (3)       - get numeric formatting information
locate (1)           - list files in databases that match a pattern
login (1)            - sign on
logname (1)          - print user's login name
look (1)             - find lines is a sorted list
lp (4)               - line printer devices
lsattr (1)           - list file attributes on a Linux second extended file system
lseek (2)            - reposition read/write file offset
magic (4)            - file command's magic number file
mailaddr (7)         - mail addressing description
make (1)             - GNU make utility to maintain groups of programs
makehole (8)         - a program to make filesystem "holes" in pure executables
man (1)              - format and display the on-line manual pages
man (7)              - macros to format man pages
manpath (1)          - determine user's search path for man pages
mapscrn (8)          - load screen output mapping table
mattrib (1)          - change MSDOS file attribute flags
mblen (3)            - determine the number of bytes in a character
mbstowcs (3)         - convert a multibyte string to a wide character string.
mbstowcs (3)         - convert a wide character string to a multibyte character string.
mbtowc (3)           - convert a multibyte character to a wide character.
mcd (1)              - change MSDOS directory
mcopy (1)            - copy MSDOS files to/from Unix
mdel (1)             - delete an MSDOS file
mdir (1)             - display an MSDOS directory
mem, kmem, port (4)  - system memory, kernel memory and system ports
memccpy (3)          - copy memory area
memchr (3)           - scan memory for a character
memcmp (3)           - compare memory areas
memcpy (3)           - copy memory area
memfrob (3)          - frobnicate (encrypt) a memory area
memmem (3)           - locate a substring
memmove (3)          - copy memory area
memset (3)           - fill memory with a constant byte
mesg (1)             - control write access to your terminal }}} {{{ Synopsis
messages (1)         - quick count of messages in mailbox or folder
mformat (1)          - add an MSDOS filesystem to a low-level formatted diskette.
mkaliases (8)        - build the aliases database for smail from the ASCII source file
mkdbm (8)            - build a DBM file suitable for use by smail
mkdir (1)            - make directories
mkdir (2)            - make a directory file
mkfifo (1)           - make FIFOs (named pipes)
mkfs (8)             - build a Linux file system
mkfs (8)             - make a Linux MINIX filesystem
mkfs.ext2 (8)        - create a Linux second extended file system
mkhpath (8)          - produce path data from an /etc/hosts file
mkline (8)           - fold an alias file, paths file or mailing list into one-line records
mklost+found (8)     - create a lost+found directory on a mounted Linux second extended file system
mkmanifest (1)       - create a shell script to restore Unix filenames
mknod (1)            - make special files
mknod (2)            - make a special file node
mkpath (8)           - make a pathalias output file
mksort (8)           - sort the standard input, allowing arbitrarily long lines
mkstemp (3)          - create a unique temporary file
mkswap (8)           - set up a Linux swap device
mktemp (3)           - make a unique temporary file name
mkuuwho (8)          - make a database suitable for the uuwho command
mlabel (1)           - make an MSDOS volume label
mmap, munmap (2)     - map or unmap files or devices into memory
mmd (1)              - make an MSDOS subdirectory
modf (3)             - extract signed integral and fractional values from floating-point number
motd (5)             - message of the day
mount, umount (2)    - mount and unmount filesystems.
mount, umount (8)    - mount and dismount file systems
mrd (1)              - remove an MSDOS subdirectory
mread (1)            - low level read (copy) an MSDOS file to Unix
mren (1)             - rename an existing MSDOS file
msgctl (2)           - message control operations
msgget (2)           - get a message queue identifier
msgop (2)            - message operations
mt (1)               - control magnetic tape drive operation
mtype (1)            - display contents of an MSDOS file
mv (1)               - rename files
mwrite (1)           - low level write (copy) a Unix file to MSDOS
netstat (8)          - Display active network connections
newalias (1)         - install new elm aliases for user and/or system
newgrp (1)           - log in to a new group
newmail,wnewmail (1) - programs to asynchronously notify of new mail
nfs (5)              - nfs fstab format and options
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 immune to hangups, with output to a non-tty
nologin (5)          - prevent usual users from log into the system
nslookup (8)         - query Internet name servers interactively
null, zero (4)       - data sink
od (1)               - dump files in octal and other formats
on_exit (3)          - register a function to be called at normal program termination.
open, creat (2)      - open and possibly create a file or device
opendir (3)          - open a directory
packets to network hosts 
passwd (1)           - change password
passwd (5)           - password file
paste (1)            - merge lines of files
patch (1)            - apply a diff file to an original
pathalias, makedb, arpatxt (8) - mail routing tools
pathchk (1)          - check whether pathnames are valid or portable
pathmerge (8)        - merge sorted paths files
pathto, uupath (1)   - calculate mail paths
pause (2)            - wait for signal
pfbtops (1)          - translate a PostScript font in .pfb format to ASCII
phys (2)             - allow a process to access physical addresses [NOT IMPLEMENTED]
pipe (2)             - create pipe
popen, pclose (3)    - process I/O
pr (1)               - convert text files for printing
printcap (5)         - printer capability data base
printenv (1)         - print all or part of environment
printf (1)           - format and print data
printf, fprintf, sprintf, vprintf, vfprintf, vsprintf (3) - formatted output conversion
printmail (1)        - format mail in a readable fashion for printing
proc_sel (9)         - select a process by a critria
profil (2)           - execution time profile
protocol 
ps (1)               - report process status
psbb (1)             - extract bounding box from PostScript document
psignal (3)          - print signal message
pstree (1)           - display a tree of processes
psupdate (8)         - update the ps database of kernel offsets
ptrace (2)           - process trace
put_file_last (9)    - moves a file to the ``end'' of the file table
putenv (3)           - change or add an environment variable
putpwent (3)         - write a password file entry
qsort (3)            - sorts an array
raise (3)            - send a signal.
ram (4)              - ram disk devive
rand, srand (3)      - random number generator.
random, srandom, initstate, setstate (3) - random number generator.
rdev (8)             - query/set image root device, swap device, RAM disk size, or video mode
read (2)             - read from a file descriptor
readdir (3)          - read a directory
readlink (2)         - read value of a symbolic link
readmsg (1)          - extract messages from a mail folder
readv, writev (3)    - read or write data into multiple buffers
reboot (2)           - reboot or disable Cntrl-Alt-Del
recv, recvfrom, recvmsg (2) - receive a message from a socket
ref (1)              - Display a C function header
remove_file_free (9) - remove a file table entry from the linked list
rename (2)           - change the name or location of a file
res_init, res_query, res_search, res_querydomain, res_mkquery, res_send,  dn_comp, dn_expand (3) - resolver routines
resolver (5)         - resolver configuration file
rewinddir (3)        - reset directory stream
rint (3)             - round to closest integer
rm (1)               - remove files
rmdir (1)            - remove empty directories
rmdir (2)            - delete a directory
route (8)            - show / manipulate the IP routing table
savelog (8)          - cycle and truncate log files
scandir, alphasort (3) - scan a directory for matching entries
scanf, fscanf, sscanf, vscanf, vsscanf, vfscanf (3) - input format conversion
sd (4)               - Driver for SCSI Disk Drives
securetty (5)        - file which lists ttys from which root can log in
seekdir (3)          - set the position of the next readdir() call in the directory stream.
select (2)           - synchronous I/O multiplexing 
selection (1)        - the cut and paste utility for Linux virtual consoles
semctl (2)           - semaphore control operations
semget (2)           - get a semaphore set identifier
semop (2)            - semaphore operations
send, sendto, sendmsg (2) - send a message from a socket
setbuf, setbuffer, setlinebuf, setvbuf (3) - stream buffering operations
setenv (3)           - change or add an environment variable
setfdprm (8)         - sets user-provided floppy disk parameters
setfont (8)          - load EGA/VGA console screen font
setgid, setegid (2)  - get group identity
setleds (1)          - set the keyboard leds
setlocale (3)        - set the current locale.
setmetamode (1)      - define the keyboard meta key handling
setpgid, getpgrp, setpgrp (2) - set/get process group
setserial (8)        - get/set Linux serial port information
setsid (8)           - run a program in a new session
setterm (1)          - set terminal attributes
setuid, seteuid (2)  - get user identity
setup (2)            - initialize the ST506 hd driver drive and partition parameters
shells (5)           - pathnames of valid login shells
shmctl (2)           - shared memory control
shmget (2)           - allocates a shared memory segment
shmop (2)            - shared memory operations
showkey (1)          - examine the scan codes and keycodes sent by the keyboard
shutdown (2)         - shut down part of a full-duplex connection
shutdown (8)         - bring the system down }}} {{{ Synopsis
sigblock, sigmask (2) - block signals
siginterrupt (3)     - allow signals to interrupt system calls
signal (7)           - list of available signals
signal, sigaction, sigsuspend, sigpending, sgetmask, ssetmask (2) - signal handling functions.
sigpause (2)         - atomically release blocked signals and wait for interrupt
sigvec (2)           - software signal facilities
sin (3)              - sine function
sinh (3)             - hyperbolic sine function
sleep (1)            - delay for a specified amount of time
sleep (3)            - Sleep for the specified number of seconds
smail, sendmail, mailq, runq, rmail, rsmtp, smtpd, newaliases (8) - mail delivery system
socket (2)           - create an endpoint for communication
socketpair (2)       - create a pair of connected sockets
sort (1)             - sort lines of text files
split (1)            - split a file into pieces
sqrt (3)             - square root function
stat, fstat, lstat (2) - get file status
statfs, fstatfs (2)  - get file system statistics
stdarg (3)           - variable argument lists
stdio (3)            - standard input/output library functions
stime (2)            - set time
strcasecmp, strncasecmp (3) - compare two strings ignoring case
strcat, strncat (3)  - concatenate two strings
strchr, strrchr (3)  - locate character in string
strcmp, strncmp (3)  - compare two strings
strcoll (3)          - compare two strings using the current locale
strcpy, strncpy (3)  - copy a string
strdup (3)           - duplicate a string
strerror (3)         - return string describing error code
strfry (3)           - randomize a string
strftime (3)         - format date and time
string: strcasecmp, strcat, strchr, strcmp, strcoll, strcpy, strcspn, strdup, strfry, strlen, strncat, strncmp, strncpy, strncasecmp, strpbrk, strrchr, strsep, strspn, strstr, strtok, strxfrm, index, rindex (3) - string operations
strlen (3)           - calculate the length of a string
strpbrk (3)          - search a string for any of a set of characters
strsep (3)           - extract token from string
strsignal (3)        - return string describing signal
strspn, strcspn (3)  - search a string for a set of characters
strstr (3)           - locate a substring
strtok (3)           - extract token from string
strtol (3)           - convert a string to a long integer.
strtoul (3)          - convert a string to an unsigned long integer.
strxfrm (3)          - string transformation
stty (1)             - change and print terminal line settings
su (1)               - run a shell with substitute user and group IDs
suffixes (7)         - list of file suffixes
sum (1)              - checksum and count the blocks in a file
swab (3)             - swap adjacent bytes
swapon, swapoff (2)  - start/stop swaping to file/device
swapon, swapoff (8)  - enable/disable devices and files for paging and swapping
symlink (2)          - make a new name for a file
sync (2)             - commit buffer cache to disk.
sync (8)             - flush Linux filesystem buffers
sysconf (3)          - Get configuration information at runtime
sysinfo (2)          - returns information on overall system statistics
system (3)           - execute a shell command
tac (1)              - concatenate and print files in reverse
tail (1)             - output the last part of files
tan (3)              - tangent function
tanh (3)             - hyperbolic tangent function
tar (1)              - gnu tape archiver. Superset of Unix tar.
tar (5)              - tape archive file format 
tee (1)              - read from standard input and write to standard output and files
telldir (3)          - return current location in directory stream.
telnetd (8)          - DARPA TELNET protocol server
tempnam (3)          - create a name for a temporary file
termcap (5)          - terminal capability database
termios, tcgetattr, tcsetattr, tcsendbreak, tcdrain, tcflush, tcflow, cfgetospeed, cfgetispeed, cfsetispeed, cfsetospeed (2) - get and set terminal attributes, line control, get and set baud rate, get and set terminal foreground process group ID
test (1)             - check file types and compare values
tfmtodit (1)         - create font files for use with groff -Tdvi
time (2)             - get time in seconds
times (2)            - get process times
tload (1)            - graphic representation of system load average
tmpfile (3)          - create a temporary file
tmpnam (3)           - create a name for a temporary file
top (1)              - display top CPU processes
touch (1)            - change file timestamps
toupper, tolower (3) - convert letter to upper or lower case
tr (1)               - translate or delete characters
true (1)             - do nothing, successfully
truncate, ftruncate (2) - truncate a file to a specified length
tty (1)              - print the path of the terminal connected to standard input
tty (4)              - controlling terminal
ttys (4)             - serial terminal lines
ttytype (5)          - terminal name and device list
tune2fs (8)          - adjust tunable filesystem parameters on second extended filesystems
tzset (3)            - initialize time conversion information
umask (2)            - set file creation mask
uname (1)            - print system information
uname (2)            - get name and information about current kernel
unexpand (1)         - convert spaces to tabs
uniq (1)             - remove duplicate lines from a sorted file
unlink (2)           - delete a name and possibly the file it refers to
update (8)           - periodically flush Linux filesystem buffers
uptime (1)           - Tell how long the system has been running.
uselib (2)           - select shared library
usleep (3)           - suspend execution for interval of microseconds
utime, utimes (2)    - change access and/or modification times of an inode
utmp, wtmp (5)       - login records
uudecode (1)         - decode a file created by uuencode
uuencode (1)         - encode a binary file
uuencode (5)         - format of an encoded uuencode file
uuwho (1)            - show map entry for a site
vhangup (2)          - virtually hangup the current tty
vlock (1)            - Virtual Console lock program
vm86 (2)             - enter virtual 8086 mode
w (1)                - Show who is logged on and what they are doing.
wait, waitpid (2)    - wait for process termination
wait3, wait4 (2)     - wait for process termination, BSD style
wall -- send a message to everybody's terminal. 
wc (1)               - print the number of bytes, words, and lines in files
wctomb (3)           - convert a wide character to a multibyte character.
wdsetup (8)          - configure Western Digital and SMC ethernet cards.
whatis (1)           - search the whatis database for complete words.
who (1)              - show who is logged on
whoami (1)           - print effective userid
write (2)            - write to a file descriptor
xargs (1)            - build and execute command lines from standard input
yes (1)              - output a string repeatedly until killed
zcmp, zdiff (1)      - compare compressed files
zforce (1)           - force a '.gz' extension on all gzip files
zgrep (1)            - search possibly compressed files for a regular expression
zmore (1)            - file perusal filter for crt viewing of compressed text
znew (1)             -  recompress .Z files to .gz files
