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as (1): the portable GNU assembler.
tc-bpf (8): BPF programmable classifier and actions for ingress/eg...
utf-8 (7): an ASCII compatible multibyte Unicode encoding
__ppc_get_timebase (3): get the current value of the Time Base Register on P...
__ppc_get_timebase_freq (3): get the current value of the Time Base Register...
__ppc_mdoio (3): Hint the processor to release shared resources
__ppc_mdoom (3): Hint the processor to release shared resources
__ppc_yield (3): Hint the processor to release shared resources
a64l (3): convert between long and base-64
accessdb (8): dumps the content of a man-db database in a human read...
addseverity (3): introduce new severity classes
aio (7): POSIX asynchronous I/O overview
aio_cancel (3): cancel an outstanding asynchronous I/O request
aio_error (3): get error status of asynchronous I/O operation
aio_fsync (3): asynchronous file synchronization
aio_init (3): asynchronous I/O initialization
aio_read (3): asynchronous read
aio_return (3): get return status of asynchronous I/O operation
aio_suspend (3): wait for asynchronous I/O operation or timeout
aio_write (3): asynchronous write
aliases (5): Postfix local alias database format
alphasort (3): scan a directory for matching entries
arch (1): print machine hardware name (same as uname -m)
arptables-nft (8): ARP table administration (nft-based)
arptables-nft-restore (8): Restore ARP Tables (nft-based)
arptables-nft-save (8): dump arptables rules to stdout (nft-based)
ascii (7): ASCII character set encoded in octal, decimal, and hex...
asctime (3): transform date and time to broken-down time or ASCII
asctime_r (3): transform date and time to broken-down time or ASCII
asin (3): arc sine function
asinf (3): arc sine function
asinh (3): inverse hyperbolic sine function
asinhf (3): inverse hyperbolic sine function
asinhl (3): inverse hyperbolic sine function
asinl (3): arc sine function
asn1parse (1ssl): ASN.1 parsing tool
asprintf (3): print to allocated string
assert (3): abort the program if assertion is false
assert_perror (3): test errnum and abort
Authen::SASL (3pm): SASL Authentication framework
Authen::SASL::Perl (3pm): - Perl implementation of the SASL Authentication f...
Authen::SASL::Perl::ANONYMOUS (3pm): Anonymous Authentication class
Authen::SASL::Perl::CRAM_MD5 (3pm): CRAM MD5 Authentication class
Authen::SASL::Perl::DIGEST_MD5 (3pm): Digest MD5 Authentication class
Authen::SASL::Perl::EXTERNAL (3pm): External Authentication class
Authen::SASL::Perl::GSSAPI (3pm): GSSAPI (Kerberosv5) Authentication class
Authen::SASL::Perl::LOGIN (3pm): Login Authentication class
Authen::SASL::Perl::PLAIN (3pm): Plain Login Authentication class
base32 (1): base32 encode/decode data and print to standard output
base64 (1): base64 encode/decode data and print to standard output
basename (1): strip directory and suffix from filenames
basename (3): parse pathname components
bash (1): GNU Bourne-Again SHell
bash-builtins (7): bash built-in commands, see bash(1)
bashbug (1): report a bug in bash
tc-basic (8): basic traffic control filter
bio (7ssl): Basic I/O abstraction
boot (7): System bootup process based on UNIX System V Release 4
btree (3): btree database access method
builtins (7): bash built-in commands, see bash(1)
byobu-screen (1): Launch byobu with screen as the backend
byobu-tmux (1): Launch byobu with tmux as the backend
c_rehash (1ssl): Create symbolic links to files named by the hash values
cal (1): displays a calendar and the date of Easter
casin (3): complex arc sine
casinf (3): complex arc sine
casinh (3): complex arc sine hyperbolic
casinhf (3): complex arc sine hyperbolic
casinhl (3): complex arc sine hyperbolic
casinl (3): complex arc sine
cbc_crypt (3): fast DES encryption
tc-cbq-details (8): Class Based Queueing
tc-cbs (8): Credit Based Shaper (CBS) Qdisc
cexp2 (3): base-2 exponent of a complex number
cexp2f (3): base-2 exponent of a complex number
cexp2l (3): base-2 exponent of a complex number
cgdisk (8): Curses-based GUID partition table (GPT) manipulator
CGI::Fast (3pm): CGI Interface for Fast CGI
CGI::Session::Driver::DBI (3pm): Base class for native DBI-related CGI::Sess...
CGI::Session::Driver::mysql (3pm): CGI::Session driver for MySQL database
tc-cgroup (8): control group based traffic control filter
chage (1): change user password expiry information
chgpasswd (8): update group passwords in batch mode
chpasswd (8): update passwords in batch mode
clnt_broadcast (3): library routines for remote procedure calls
clog10 (3): base-10 logarithm of a complex number
clog10f (3): base-10 logarithm of a complex number
clog10l (3): base-10 logarithm of a complex number
clog2 (3): base-2 logarithm of a complex number
clog2f (3): base-2 logarithm of a complex number
clog2l (3): base-2 logarithm of a complex number
col1 (1): awk and print a column (based on the name of the progr...
col2 (1): awk and print a column (based on the name of the progr...
col3 (1): awk and print a column (based on the name of the progr...
col4 (1): awk and print a column (based on the name of the progr...
col5 (1): awk and print a column (based on the name of the progr...
col6 (1): awk and print a column (based on the name of the progr...
col7 (1): awk and print a column (based on the name of the progr...
col8 (1): awk and print a column (based on the name of the progr...
col9 (1): awk and print a column (based on the name of the progr...
complex (7): basics of complex mathematics
cpan (1): easily interact with CPAN from the command line
cpan5.30-x86_64-linux-gnu (1): easily interact with CPAN from the command line
cpgr (8): copy with locking the given file to the password or gr...
cppw (8): copy with locking the given file to the password or gr...
crypt (3): passphrase hashing
crypt (5): storage format for hashed passphrases and available ha...
crypt_gensalt (3): encode settings for passphrase hashing
crypt_gensalt_ra (3): encode settings for passphrase hashing
crypt_gensalt_rn (3): encode settings for passphrase hashing
crypt_preferred_method (3): get the prefix of the preferred hash method
crypt_r (3): passphrase hashing
crypt_ra (3): passphrase hashing
crypt_rn (3): passphrase hashing
ctime (3): transform date and time to broken-down time or ASCII
ctime_r (3): transform date and time to broken-down time or ASCII
dash (1): command interpreter (shell)
db (3): database access methods
DBD::File (3pm): Base class for writing file based DBI drivers
DBD::File::HowTo (3pm): Guide to create DBD::File based driver
DBD::Gofer::Policy::Base (3pm): Base class for DBD::Gofer policies
DBD::Gofer::Policy::classic (3pm): The 'classic' policy for DBD::Gofer
DBD::Gofer::Transport::Base (3pm): base class for DBD::Gofer client transports
DBD::Gofer::Transport::corostream (3pm): Async DBD::Gofer stream transport u...
DBD::Pg (3pm): PostgreSQL database driver for the DBI module
DBI (3pm): Database independent interface for Perl
DBI::DBD (3pm): Perl DBI Database Driver Writer's Guide
DBI::DBD::SqlEngine (3pm): Base class for DBI drivers without their own SQL ...
DBI::DBD::SqlEngine::HowTo (3pm): Guide to create DBI::DBD::SqlEngine based ...
DBI::Gofer::Serializer::Base (3pm): base class for Gofer serialization
DBI::Gofer::Transport::Base (3pm): Base class for Gofer transports
DBI::Util::CacheMemory (3pm): a very fast but very minimal subset of Cache::...
dbopen (3): database access methods
dbus-run-session (1): start a process as a new D-Bus session
dconf-service (1): D-Bus service for writes to the dconf database
deb-control (5): Debian binary packages' master control file format
deb-src-control (5): Debian source packages' master control file format
debconf-copydb (1): copy a debconf database
debconf-set-selections (1): insert new values into the debconf database
debconf-show (1): query the debconf database
des_crypt (3): fast DES encryption
DES_FAILED (3): fast DES encryption
des_setparity (3): fast DES encryption
dh_bash-completion (1): install bash completions for package
dhclient.leases (5): DHCP client lease database
dirname (1): strip last component from file name
distro-info (1): provides information about the distributions' releases
dmmp_context_free (3): Release the memory of struct dmmp_context.
dmmp_last_error_msg (3): Retrieves the last error message.
dmmp_mpath_name_get (3): Retrieve name(alias) of certain mpath.
dnssec-cds (8): change DS records for a child zone based on CDS/CDNSKEY
dnssec-keymgr (8): ensure correct DNSKEY coverage based on a defined policy
do-release-upgrade (8): upgrade operating system to latest release
dpkg-preconfigure (8): let packages ask questions prior to their installation
dpkg-query (1): a tool to query the dpkg database
Dpkg::Changelog (3perl): base class to implement a changelog parser
Dpkg::Compression (3perl): simple database of available compression methods
Dpkg::Control::Hash (3perl): parse and manipulate a block of RFC822-like fields
Dpkg::Control::HashCore (3perl): parse and manipulate a block of RFC822-like...
Dpkg::Deps::Multiple (3perl): base module to represent multiple dependencies
ebtables-nft (8): Ethernet bridge frame table administration (nft-based)
ecb_crypt (3): fast DES encryption
tc-ematch (8): extended matches for use with "basic", "cgroup" or "fl...
endaliasent (3): read an alias entry
endpwent (3): get password file entry
endspent (3): get shadow password file entry
errno (3): number of last error
Error::Simple (3pm): the simple error sub-class of Error
ethers (5): Ethernet address to IP number database
exp (3): base-e exponential function
exp10 (3): base-10 exponential function
exp10f (3): base-10 exponential function
exp10l (3): base-10 exponential function
exp2 (3): base-2 exponential function
exp2f (3): base-2 exponential function
exp2l (3): base-2 exponential function
expf (3): base-e exponential function
expiry (1): check and enforce password expiration policy
expl (3): base-e exponential function
FCGI (3pm): Fast CGI module
fcgistarter (8): Start a FastCGI program
fdatasync (2): synchronize a file's in-core state with storage device
fgetpwent (3): get password file entry
fgetpwent_r (3): get passwd file entry reentrantly
fgetspent (3): get shadow password file entry
fgetspent_r (3): get shadow password file entry
finite (3): BSD floating-point classification functions
finitef (3): BSD floating-point classification functions
finitel (3): BSD floating-point classification functions
tc-flow (8): flow based traffic control filter
tc-flower (8): flow based traffic control filter
flush (8postfix): Postfix fast flush server
fmemopen (3): open memory as stream
fork (3am): basic process management
fpclassify (3): floating-point classification macros
futex (2): fast user-space locking
futex (7): fast user-space locking
gai_cancel (3): asynchronous network address and service translation
gai_error (3): asynchronous network address and service translation
gai_suspend (3): asynchronous network address and service translation
getaddrinfo_a (3): asynchronous network address and service translation
getaliasbyname (3): read an alias entry
getaliasbyname_r (3): read an alias entry
getaliasent (3): read an alias entry
getaliasent_r (3): read an alias entry
getpass (3): get a password
getpt (3): open the pseudoterminal master (PTM)
getpw (3): reconstruct password line entry
getpwent (3): get password file entry
getpwent_r (3): get passwd file entry reentrantly
getpwnam (3): get password file entry
getpwnam_r (3): get password file entry
getpwuid (3): get password file entry
getpwuid_r (3): get password file entry
getspent (3): get shadow password file entry
getspent_r (3): get shadow password file entry
getspnam (3): get shadow password file entry
getspnam_r (3): get shadow password file entry
getumask (3): get file creation mask
git-blame (1): Show what revision and author last modified each line ...
git-credential-cache (1): Helper to temporarily store passwords in memory
git-describe (1): Give an object a human readable name based on an avail...
git-fast-export (1): Git data exporter
git-fast-import (1): Backend for fast Git data importers
git-hash-object (1): Compute object ID and optionally creates a blob from a...
git-merge-base (1): Find as good common ancestors as possible for a merge
git-prune (1): Prune all unreachable objects from the object database
git-push (1): Update remote refs along with associated objects
git-rebase (1): Reapply commits on top of another base tip
git-rev-parse (1): Pick out and massage parameters
git-stash (1): Stash the changes in a dirty working directory away
gitcredentials (7): providing usernames and passwords to Git
glib-compile-schemas (1): GSettings schema compiler
gmtime (3): transform date and time to broken-down time or ASCII
gmtime_r (3): transform date and time to broken-down time or ASCII
gnu_get_libc_release (3): get glibc version and release
gnu_get_libc_version (3): get glibc version and release
gpasswd (1): administer /etc/group and /etc/gshadow
gpg-check-pattern (1): Check a passphrase on stdin against the patternfile
gpg-preset-passphrase (1): Put a passphrase into gpg-agent's cache
grpconv (8): convert to and from shadow passwords and groups
grpunconv (8): convert to and from shadow passwords and groups
grub-mkpasswd-pbkdf2 (1): generate hashed password for GRUB
grub-mkstandalone (1): make a memdisk-based GRUB image
hash (3): hash database access method
hasmntopt (3): get filesystem descriptor file entry
hcreate (3): hash table management
hcreate_r (3): hash table management
hd (1): ASCII, decimal, hexadecimal, octal dump
hdestroy (3): hash table management
hdestroy_r (3): hash table management
hexdump (1): ASCII, decimal, hexadecimal, octal dump
hsearch (3): hash table management
hsearch_r (3): hash table management
htdbm (1): Manipulate DBM password databases
HTML::AsSubs (3pm): functions that construct a HTML syntax tree
HTML::Element (3pm): Class for objects that represent HTML elements
HTML::Form (3pm): Class that represents an HTML form element
HTML::FormatMarkdown (3pm): Format HTML as Markdown
HTML::FormatPS (3pm): Format HTML as PostScript
HTML::FormatRTF (3pm): Format HTML as RTF
HTML::Formatter (3pm): Base class for HTML formatters
HTML::FormatText (3pm): Format HTML as plaintext
HTML::Parser (3pm): HTML parser class
htpasswd (1): Manage user files for basic authentication
HTTP::Daemon (3pm): A simple http server class
HTTP::Headers (3pm): Class encapsulating HTTP Message headers
HTTP::Message (3pm): HTTP style message (base class)
hwdb (7): Hardware Database
io_cancel (2): cancel an outstanding asynchronous I/O operation
io_destroy (2): destroy an asynchronous I/O context
io_getevents (2): read asynchronous I/O events from the completion queue
io_setup (2): create an asynchronous I/O context
io_submit (2): submit asynchronous I/O blocks for processing
ionice (1): set or get process I/O scheduling class and priority
ioprio_get (2): get/set I/O scheduling class and priority
ioprio_set (2): get/set I/O scheduling class and priority
ip-maddress (8): multicast addresses management
ip-mroute (8): multicast routing cache management
ip-rule (8): routing policy database management
ip6tables-legacy (8): iptables using old getsockopt/setsockopt-based kernel api
ip6tables-legacy-restore (8): iptables using old getsockopt/setsockopt-based...
ip6tables-legacy-save (8): iptables using old getsockopt/setsockopt-based ke...
iptables-legacy (8): iptables using old getsockopt/setsockopt-based kernel api
iptables-legacy-restore (8): iptables using old getsockopt/setsockopt-based ...
iptables-legacy-save (8): iptables using old getsockopt/setsockopt-based ker...
isalnum (3): character classification functions
isalnum_l (3): character classification functions
isalpha (3): character classification functions
isalpha_l (3): character classification functions
isascii (3): character classification functions
isascii_l (3): character classification functions
isastream (2): unimplemented system calls
isblank (3): character classification functions
isblank_l (3): character classification functions
iscntrl (3): character classification functions
iscntrl_l (3): character classification functions
isdigit (3): character classification functions
isdigit_l (3): character classification functions
isfinite (3): floating-point classification macros
isgraph (3): character classification functions
isgraph_l (3): character classification functions
isinf (3): floating-point classification macros
isinff (3): BSD floating-point classification functions
isinfl (3): BSD floating-point classification functions
islower (3): character classification functions
islower_l (3): character classification functions
isnan (3): floating-point classification macros
isnanf (3): BSD floating-point classification functions
isnanl (3): BSD floating-point classification functions
isnormal (3): floating-point classification macros
isprint (3): character classification functions
isprint_l (3): character classification functions
ispunct (3): character classification functions
ispunct_l (3): character classification functions
isspace (3): character classification functions
isspace_l (3): character classification functions
isupper (3): character classification functions
isupper_l (3): character classification functions
iswctype (3): wide-character classification
iswlower (3): test for lowercase wide character
iswupper (3): test for uppercase wide character
isxdigit (3): character classification functions
isxdigit_l (3): character classification functions
JSON (3pm): JSON (JavaScript Object Notation) encoder/decoder
JSON::XS (3pm): JSON serialising/deserialising, done correctly and fast
l64a (3): convert between long and base-64
last (1): show a listing of last logged in users
lastb (1): show a listing of last logged in users
lastlog (8): reports the most recent login of all users or of a giv...
lckpwdf (3): get shadow password file entry
lighttpd (8): a fast, secure and flexible web server
localtime (3): transform date and time to broken-down time or ASCII
localtime_r (3): transform date and time to broken-down time or ASCII
log10 (3): base-10 logarithmic function
log10f (3): base-10 logarithmic function
log10l (3): base-10 logarithmic function
log2 (3): base-2 logarithmic function
log2f (3): base-2 logarithmic function
log2l (3): base-2 logarithmic function
login.defs (5): shadow password suite configuration
lsb_release (1): print distribution-specific information
lvmdiskscan (8): List devices that may be used as physical volumes
LWP::MemberMixin (3pm): Member access mixin class
LWP::Protocol (3pm): Base class for LWP protocols
LWP::RobotUA (3pm): a class for well-behaved Web robots
LWP::UserAgent (3pm): Web user agent class
Mail::Field (3pm): base-class for manipulation of mail header fields
malloc_trim (3): release free memory from the heap
master (5): Postfix master process configuration file format
master (8postfix): Postfix master process
memcmp (3): compare memory areas
migrate-pubring-from-classic-gpg (1): Migrate a public keyring from "classic...
mksquashfs (1): tool to create and append to squashfs filesystems
mktime (3): transform date and time to broken-down time or ASCII
named-nzd2nzf (8): convert an NZD database to NZF text format
nameif (8): name network interfaces based on MAC addresses
ncal (1): displays a calendar and the date of Easter
neqn (1): format equations for ASCII output
newaliases (1): Postfix to Sendmail compatibility interface
NF (1): awk and print a column (based on the name of the progr...
node (1): server-side JavaScript runtime
nsec3hash (8): generate NSEC3 hash
openssl-asn1parse (1ssl): ASN.1 parsing tool
openssl-c_rehash (1ssl): Create symbolic links to files named by the hash va...
openssl-passwd (1ssl): compute password hashes
openssl-rehash (1ssl): Create symbolic links to files named by the hash values
openssl-srp (1ssl): maintain SRP password file
os-release (5): Operating system identification
pam_lastlog (8): PAM module to display date of last login and perform i...
pam_listfile (8): deny or allow services based on an arbitrary file
pam_localuser (8): require users to be listed in /etc/passwd
pam_pwhistory (8): PAM module to remember last passwords
pam_umask (8): PAM module to set the file mode creation mask
pam_unix (8): Module for traditional password authentication
pam_userdb (8): PAM module to authenticate against a db database
passphrase-encoding (7ssl): How diverse parts of OpenSSL treat pass phrases ...
passwd (1): change user password
passwd (1ssl): compute password hashes
passwd (5): the password file
passwd2des (3): RFS password encryption
paste (1): merge lines of files
pastebinit (1): command-line pastebin client
pbget (1): compress and encode arbitrary files to pastebin.com
pbput (1): compress and encode arbitrary files to pastebin.com
pbputs (1): compress and encode arbitrary files to pastebin.com
pciconfig_iobase (2): pci device information handling
tc-pfifo_fast (8): three-band first in, first out queue
pgrep (1): look up or signal processes based on name and other at...
pinentry (1): PIN or pass-phrase entry dialog for GnuPG
pinentry-curses (1): PIN or pass-phrase entry dialog for GnuPG
pkexec (1): Execute a command as another user
pkill (1): look up or signal processes based on name and other at...
pod2text (1): Convert POD data to formatted ASCII text
pollinate (1): an Entropy-as-a-Service client
postalias (1): Postfix alias database maintenance
postfix-add-filter (8): add filter service to Postfix master.cf
postfix-add-policy (8): add policy service to Postfix master.cf
pow10 (3): base-10 power functions
pow10f (3): base-10 power functions
pow10l (3): base-10 power functions
pthread_sigmask (3): examine and change mask of blocked signals
ptmx (4): pseudoterminal master and slave
pts (4): pseudoterminal master and slave
putgrent (3): write a group database entry to a file
putpwent (3): write a password file entry
putspent (3): get shadow password file entry
pwck (8): verify integrity of password files
pwconv (8): convert to and from shadow passwords and groups
pwunconv (8): convert to and from shadow passwords and groups
quotactl (2): manipulate disk quotas
rbash (1): restricted bash, see bash(1)
readfile (3am): return the entire contents of a file as a string
recno (3): record number database access method
regulatory.bin (5): The Linux wireless regulatory database
regulatory.db (5): The Linux wireless regulatory database
rehash (1ssl): Create symbolic links to files named by the hash values
rpc (5): RPC program number data base
rsync (1): a fast, versatile, remote (and local) file-copying tool
rt_sigprocmask (2): examine and change blocked signals
rtpr (8): replace backslashes with newlines.
safe_finger (8): finger client wrapper that protects against nasty stuf...
sbsiglist (1): Create EFI_SIGNATURE_LIST signature databases
sched_getaffinity (2): set and get a thread's CPU affinity mask
sched_setaffinity (2): set and get a thread's CPU affinity mask
setaliasent (3): read an alias entry
setlogmask (3): set log priority mask
setns (2): reassociate thread with a namespace
setpwent (3): get password file entry
setspent (3): get shadow password file entry
tc-sfb (8): Stochastic Fair Blue
tc-sfq (8): Stochastic Fairness Queueing
sg (1): execute command as different group ID
sg_emc_trespass (8): change ownership of SCSI LUN from another Service-Proc...
sg_opcodes (8): report supported SCSI commands or task management func...
sg_reassign (8): send SCSI REASSIGN BLOCKS command
sg_sat_phy_event (8): use ATA READ LOG EXT via a SAT pass-through to fetch S...
sg_unmap (8): send SCSI UNMAP command (known as 'trim' in ATA specs)
sgetmask (2): manipulation of signal mask (obsolete)
sgetspent (3): get shadow password file entry
sgetspent_r (3): get shadow password file entry
shadow (5): shadowed password file
shasum (1): Print or Check SHA Checksums
sigevent (7): structure for notification from asynchronous routines
siggetmask (3): BSD signal API
sigmask (3): BSD signal API
signal-safety (7): async-signal-safe functions
sigpause (3): atomically release blocked signals and wait for interrupt
sigprocmask (2): examine and change blocked signals
sigsetmask (3): BSD signal API
tc-simple (8): basic example action
sos-mask (1): (unknown subject)
spawn-fcgi (1): Spawns FastCGI processes
sqldiff (1): sqlite3 database difference utility
srp (1ssl): maintain SRP password file
ssetmask (2): manipulation of signal mask (obsolete)
ssh-argv0 (1): replaces the old ssh command-name as hostname handling
ssh-keysign (8): OpenSSH helper for host-based authentication
strcasecmp (3): compare two strings ignoring case
strcasestr (3): locate a substring
strncasecmp (3): compare two strings ignoring case
strtod (3): convert ASCII string to floating-point number
strtof (3): convert ASCII string to floating-point number
strtold (3): convert ASCII string to floating-point number
sudo (8): execute a command as another user
sudoedit (8): execute a command as another user
switch_root (8): switch to another filesystem as the root of the mount ...
systemd-ask-password (1): Query the user for a system password
systemd-ask-password-console.path (8): Query the user for system passwords o...
systemd-ask-password-console.service (8): Query the user for system password...
systemd-ask-password-wall.path (8): Query the user for system passwords on t...
systemd-ask-password-wall.service (8): Query the user for system passwords o...
systemd-bless-boot (8): Mark current boot process as successful
systemd-bless-boot.service (8): Mark current boot process as successful
systemd-hwdb (8): hardware database management tool
systemd-tty-ask-password-agent (1): List or process pending systemd password...
tail (1): output the last part of files
TAILQ_LAST (3): implementations of singly-linked lists, singly-linked ...
taskset (1): set or retrieve a process's CPU affinity
tc-cbq (8): Class Based Queueing
termcap (5): terminal capability database
terminfo (5): terminal capability data base
toascii (3): convert character to ASCII
tolower (3): convert uppercase or lowercase
tolower_l (3): convert uppercase or lowercase
toupper (3): convert uppercase or lowercase
toupper_l (3): convert uppercase or lowercase
towlower (3): convert a wide character to lowercase
towlower_l (3): convert a wide character to lowercase
towupper (3): convert a wide character to uppercase
towupper_l (3): convert a wide character to uppercase
tput (1): initialize a terminal or query terminfo database
ucfq (1): query the ucf database
ucfr (1): Update Configuration File Registry: associate packages...
ulckpwdf (3): get shadow password file entry
umask (2): set file mode creation mask
unix_chkpwd (8): Helper binary that verifies the password of the curren...
unix_update (8): Helper binary that updates the password of a given user
unlockpt (3): unlock a pseudoterminal master/slave pair
unshare (2): disassociate parts of the process execution context
unsquashfs (1): tool to uncompress squashfs filesystems
update-ieee-data (8): update data files from IEEE Standards Association such...
update-mime-database (1): a program to build the Shared MIME-Info database c...
update-passwd (8): safely update /etc/passwd, /etc/shadow and /etc/group
update-smart-drivedb (8): update smartmontools drive database
uptime (1): Tell how long the system has been running.
URI::WithBase (3pm): URIs which remember their base
utf8 (7): an ASCII compatible multibyte Unicode encoding
utime (2): change file last access and modification times
utimes (2): change file last access and modification times
vasprintf (3): print to allocated string
vigr (8): edit the password, group, shadow-password or shadow-gr...
vipw (8): edit the password, group, shadow-password or shadow-gr...
virtual (5): Postfix virtual alias table format
wcscasecmp (3): compare two wide-character strings, ignoring case
wcsncasecmp (3): compare two fixed-size wide-character strings, ignorin...
wctob (3): try to represent a wide character as a single byte
wctype (3): wide-character classification
wpa_passphrase (8): Generate a WPA PSK from an ASCII passphrase for a SSID
WWW::RobotRules (3pm): database of robots.txt-derived permissions
x86_64-linux-gnu-as (1): the portable GNU assembler.
xcrypt (3): RFS password encryption
xdecrypt (3): RFS password encryption
xencrypt (3): RFS password encryption
xtables-legacy (8): iptables using old getsockopt/setsockopt-based kernel api
xtables-legacy-multi (8): iptables using old getsockopt/setsockopt-based ker...