adduser.conf (5)     - configuration file for adduser(8) and addgroup(8) .
deluser.conf (5)     - configuration file for deluser(8) and delgroup(8) .
HEAD (1p)            - Simple command line user agent
__clear_user (9)     - Zero a block of memory in user space, with less checking.
__copy_from_user (9) - Copy a block of data from user space, with less checking.
__copy_to_user (9)   - Copy a block of data into user space, with less checking.
__copy_to_user_inatomic (9) - Copy a block of data into user space, with less...
__uio_register_device (9) - register a new userspace IO device
_copy_from_user (9)  - Copy a block of data from user space.
_copy_to_user (9)    - Copy a block of data into user space.
access (2)           - check user's permissions for a file
addgroup (8)         - add a user or group to the system
adduser (8)          - add a user or group to the system
ALTER_USER (7)       - change a database role
ALTER_USER_MAPPING (7) - change the definition of a user mapping
applygnupgdefaults (8) - Run gpgconf - apply-defaults for all users.
arpd (8)             - userspace arp daemon.
ata_dump_status (9)  - user friendly display of error info
ata_scsi_user_scan (9) - indication for user-initiated bus scan
autodie::hints (3perl) - Provide hints about user subroutines to autodie
avc_add_callback (3) - additional event notification for SELinux userspace ob...
avc_av_stats (3)     - obtain userspace SELinux AVC statistics
avc_cache_stats (3)  - obtain userspace SELinux AVC statistics
avc_cleanup (3)      - userspace SELinux AVC setup and teardown
avc_destroy (3)      - userspace SELinux AVC setup and teardown
avc_init (3)         - legacy userspace SELinux AVC setup
avc_open (3)         - userspace SELinux AVC setup and teardown
avc_reset (3)        - userspace SELinux AVC setup and teardown
avc_sid_stats (3)    - obtain userspace SELinux AVC statistics
bitmap_parse_user (9) - convert an ASCII hex string in a user buffer into a b...
bitmap_parselist_user (9) - (unknown subject)
blk_rq_map_user_iov (9) - map user data to a request, for REQ_TYPE_BLOCK_PC u...
blk_rq_unmap_user (9) - unmap a request with user data
bpf_prog_create_from_user (9) - create an unattached filter from user buffer
bsd-write (1)        - send a message to another user
call_usermodehelper (9) - prepare and start a usermode application
call_usermodehelper_exec (9) - start a usermode application
call_usermodehelper_setup (9) - prepare to call a usermode helper
cfg80211_cqm_pktloss_notify (9) - notify userspace about packetloss to peer
cfg80211_new_sta (9) - notify userspace about station
chage (1)            - change user password expiry information
chfn (1)             - change real user name and information
clear_user (9)       - Zero a block of memory in user space.
context_user_get (3) - Routines to manipulate SELinux security contexts
context_user_set (3) - Routines to manipulate SELinux security contexts
copy_from_user_toio (9) - copy data from user-space to mmio-space
copy_to_user_fromio (9) - copy data from mmio-space to user-space
CREATE_USER (7)      - define a new database role
CREATE_USER_MAPPING (7) - define a new mapping of a user to a foreign server
createuser (1)       - define a new PostgreSQL user account
crontab (1)          - maintain crontab files for individual users (Vixie Cron)
cuserid (3)          - get username
delgroup (8)         - remove a user or group from the system
deluser (8)          - remove a user or group from the system
des_read_2passwords (3ssl) - Compatibility user interface functions
des_read_password (3ssl) - Compatibility user interface functions
des_read_pw (3ssl)   - Compatibility user interface functions
des_read_pw_string (3ssl) - Compatibility user interface functions
dev_get_flags (9)    - get flags reported to userspace
dma_buf_mmap (9)     - Setup up a userspace mmap with the given vma
dma_mmap_from_coherent (9) - try to mmap the memory allocated from per-device...
doveadm-auth (1)     - Test authentication for a user
doveadm-batch (1)    - Execute multiple commands for multiple users
doveadm-kick (1)     - Disconnect users by user name and/or IP address
doveadm-user (1)     - Perform a user lookup in Dovecot's userdbs
DROP_USER (7)        - remove a database role
DROP_USER_MAPPING (7) - remove a user mapping for a foreign server
dropuser (1)         - remove a PostgreSQL user account
eaccess (3)          - check effective user's permissions for a file
edd_show_raw_data (9) - copies raw data to buffer for userspace to parse
endusershell (3)     - get permitted user shells
environ (7)          - user environment
ERR_load_UI_strings (3ssl) - New User Interface
euidaccess (3)       - check effective user's permissions for a file
execute_in_process_context (9) - reliably execute the routine with user context
faccessat (2)        - check user's permissions for a file
fault_in_user_writeable (9) - Fault in user address and verify RW access
finger@ (1)          - gets user information from a remote host.
follow_pfn (9)       - look up PFN at a user virtual address
fuser (1)            - identify processes using files or sockets
futex (2)            - fast user-space locking
futex (7)            - fast user-space locking
GET (1p)             - Simple command line user agent
get_default_context (3) - determine SELinux context(s) for user sessions
get_default_context_with_level (3) - determine SELinux context(s) for user se...
get_default_context_with_role (3) - determine SELinux context(s) for user ses...
get_default_context_with_rolelevel (3) - determine SELinux context(s) for use...
get_default_type (3) - determine SELinux context(s) for user sessions
get_ordered_context_list (3) - determine SELinux context(s) for user sessions
get_ordered_context_list_with_level (3) - determine SELinux context(s) for us...
get_user_pages_fast (9) - pin user pages in memory
getcontext (2)       - get or set the user context
getcontext (3)       - get or set the user context
geteuid (2)          - get user identity
geteuid32 (2)        - get user identity
getgrouplist (3)     - get list of groups to which a user belongs
getlogin (3)         - get username
getlogin_r (3)       - get username
getresgid (2)        - get real, effective and saved user/group IDs
getresgid32 (2)      - get real, effective and saved user/group IDs
getresuid (2)        - get real, effective and saved user/group IDs
getresuid32 (2)      - get real, effective and saved user/group IDs
getseuserbyname (3)  - get SELinux username and level for a given Linux username
getuid (2)           - get user identity
getuid32 (2)         - get user identity
getusershell (3)     - get permitted user shells
git-credential (1)   - Retrieve and store user credentials
git-credential-cache--daemon (1) - Temporarily store user credentials in memory
gitcredentials (7)   - providing usernames and passwords to Git
gitcvs-migration (7) - Git for CVS users
GnuPG::UserAttribute (3pm) - GnuPG User Attribute Objects
GnuPG::UserId (3pm)  - GnuPG User ID Objects
group (5)            - user group file
groups (1)           - print the groups a user is in
hosts.equiv (5)      - list of hosts and users that are granted "trusted" r c...
htdigest (1)         - manage user files for digest authentication
HTML::Tree::AboutObjects (3pm) - - article: "User's View of Object-Oriented M...
htpasswd (1)         - Manage user files for basic authentication
I18N::LangTags::Detect (3perl) - detect the user's language preferences
id (1)               - print real and effective user and group IDs
intro (1)            - introduction to user commands
iruserok (3)         - routines for returning a stream to a remote command
iruserok_af (3)      - routines for returning a stream to a remote command
kernel_to_ipc64_perm (9) - convert kernel ipc permissions to user
kfifo_from_user (9)  - puts some data from user space into the fifo
kfifo_to_user (9)    - copies data from the fifo into user space
kstrtobool (9)       - convert common user inputs into boolean values
last (1)             - show listing of last logged in users
lastb (1)            - show listing of last logged in users
lastlog (8)          - reports the most recent login of all users or of a giv...
logname (1)          - print user's login name
lwp-request (1p)     - Simple command line user agent
LWP::Protocol::https (3pm) - Provide https support for LWP::UserAgent
LWP::UserAgent (3pm) - Web user agent class
lxc-user-nic (1)     - Create and attach a nic to another network namespace.
lxc-usernet (5)      - unprivileged user network administration file.
lxc-usernsexec (1)   - Run a task as root in a new user namespace.
Mail::Box::Manage::User (3pm) - manage the folders of a user
makecontext (3)      - manipulate user context
manual_user_enter_context (3) - determine SELinux context(s) for user sessions
memdup_user (9)      - duplicate memory region from user space
memdup_user_nul (9)  - duplicate memory region from user space and NUL-terminate
mutt (1)             - The Mutt Mail User Agent
mutt-org (1)         - The Mutt Mail User Agent
mutt-patched (1)     - The Mutt Mail User Agent
muttrc (5)           - Configuration file for the Mutt Mail User Agent
muttrc-org (5)       - Configuration file for the Mutt Mail User Agent
muttrc-patched (5)   - Configuration file for the Mutt Mail User Agent
Net::Netrc (3perl)   - OO interface to users netrc file
netlink (7)          - communication between kernel and user space (AF_NETLINK)
newusers (8)         - update and create new users in batch
nologin (5)          - prevent unprivileged users from logging into the system
pam_error (3)        - display error messages to the user
pam_get_user (3)     - get user name
pam_info (3)         - display messages to the user
pam_issue (8)        - PAM module to add issue file to user prompt
pam_localuser (8)    - require users to be listed in /etc/passwd
pam_loginuid (8)     - Record user's login uid to the process attribute
pam_mkhomedir (8)    - PAM module to create users home directory
pam_nologin (8)      - Prevent non-root users from login
pam_setcred (3)      - establish / delete user credentials
pam_sm_authenticate (3) - PAM service function for user authentication
pam_systemd (8)      - Register user sessions in the systemd login manager
pam_tty_audit (8)    - Enable or disable TTY auditing for specified users
pam_userdb (8)       - PAM module to authenticate against a db database
pam_verror (3)       - display error messages to the user
pam_vinfo (3)        - display messages to the user
pam_xauth (8)        - PAM module to forward xauth keys between users
passwd (1)           - change user password
pci_mmap_legacy_io (9) - map legacy PCI IO into user memory space
pci_mmap_legacy_mem (9) - map legacy PCI memory into user memory space
pci_mmap_resource (9) - map a PCI resource into user memory space
perlpragma (1)       - how to write a user pragma
POST (1p)            - Simple command line user agent
postgresqlrc (5)     - Per-user PostgreSQL cluster configuration
proc_dointvec_userhz_jiffies (9) - read a vector of integers as 1/USER_HZ sec...
pure-mrtginfo (8)    - provide an MRTG-graphable user count for ftpd
pure-pw (8)          - Manage virtual users files for Pure-FTPd
pure-pwconvert (8)   - Generate a virtual users file from system accounts
qemu-aarch64 (1)     - QEMU User Emulator
qemu-alpha (1)       - QEMU User Emulator
qemu-arm (1)         - QEMU User Emulator
qemu-armeb (1)       - QEMU User Emulator
qemu-cris (1)        - QEMU User Emulator
qemu-i386 (1)        - QEMU User Emulator
qemu-m68k (1)        - QEMU User Emulator
qemu-microblaze (1)  - QEMU User Emulator
qemu-microblazeel (1) - QEMU User Emulator
qemu-mips (1)        - QEMU User Emulator
qemu-mips64 (1)      - QEMU User Emulator
qemu-mips64el (1)    - QEMU User Emulator
qemu-mipsel (1)      - QEMU User Emulator
qemu-mipsn32 (1)     - QEMU User Emulator
qemu-mipsn32el (1)   - QEMU User Emulator
qemu-or32 (1)        - QEMU User Emulator
qemu-ppc (1)         - QEMU User Emulator
qemu-ppc64 (1)       - QEMU User Emulator
qemu-ppc64abi32 (1)  - QEMU User Emulator
qemu-ppc64le (1)     - QEMU User Emulator
qemu-s390x (1)       - QEMU User Emulator
qemu-sh4 (1)         - QEMU User Emulator
qemu-sh4eb (1)       - QEMU User Emulator
qemu-sparc (1)       - QEMU User Emulator
qemu-sparc32plus (1) - QEMU User Emulator
qemu-sparc64 (1)     - QEMU User Emulator
qemu-system (1)      - QEMU Emulator User Documentation
qemu-system-aarch64 (1) - QEMU Emulator User Documentation
qemu-system-alpha (1) - QEMU Emulator User Documentation
qemu-system-arm (1)  - QEMU Emulator User Documentation
qemu-system-cris (1) - QEMU Emulator User Documentation
qemu-system-i386 (1) - QEMU Emulator User Documentation
qemu-system-lm32 (1) - QEMU Emulator User Documentation
qemu-system-m68k (1) - QEMU Emulator User Documentation
qemu-system-microblaze (1) - QEMU Emulator User Documentation
qemu-system-microblazeel (1) - QEMU Emulator User Documentation
qemu-system-mips (1) - QEMU Emulator User Documentation
qemu-system-mips64 (1) - QEMU Emulator User Documentation
qemu-system-mips64el (1) - QEMU Emulator User Documentation
qemu-system-mipsel (1) - QEMU Emulator User Documentation
qemu-system-moxie (1) - QEMU Emulator User Documentation
qemu-system-or32 (1) - QEMU Emulator User Documentation
qemu-system-ppc (1)  - QEMU Emulator User Documentation
qemu-system-ppc64 (1) - QEMU Emulator User Documentation
qemu-system-ppcemb (1) - QEMU Emulator User Documentation
qemu-system-s390x (1) - QEMU Emulator User Documentation
qemu-system-sh4 (1)  - QEMU Emulator User Documentation
qemu-system-sh4eb (1) - QEMU Emulator User Documentation
qemu-system-sparc (1) - QEMU Emulator User Documentation
qemu-system-sparc64 (1) - QEMU Emulator User Documentation
qemu-system-unicore32 (1) - QEMU Emulator User Documentation
qemu-system-x86_64 (1) - QEMU Emulator User Documentation
qemu-system-xtensa (1) - QEMU Emulator User Documentation
qemu-system-xtensaeb (1) - QEMU Emulator User Documentation
qemu-unicore32 (1)   - QEMU User Emulator
qemu-user (1)        - QEMU User Emulator
qemu-x86_64 (1)      - QEMU User Emulator
query_user_context (3) - determine SELinux context(s) for user sessions
readline (3readline) - get a line from a user with editing
remap_pfn_range (9)  - remap kernel memory to userspace
remap_vmalloc_range (9) - map vmalloc pages to userspace
remap_vmalloc_range_partial (9) - map vmalloc pages to userspace
request_firmware_direct (9) - load firmware directly without usermode helper
rpc_mkpipe_dentry (9) - make an rpc_pipefs file for kernel<->userspace commun...
rpc_queue_upcall (9) - queue an upcall message to userspace
runuser (1)          - run a command with substitute user and group ID
ruserok (3)          - routines for returning a stream to a remote command
ruserok_af (3)       - routines for returning a stream to a remote command
scsi_add_single_device (9) - Respond to user request to probe for/add device
scsi_device_quiesce (9) - Block user issued commands.
scsi_device_resume (9) - Restart user issued commands to a quiesced device.
scsi_remove_single_device (9) - Respond to user request to remove a device
security_compute_user (3) - query the SELinux policy database in the kernel
security_compute_user_raw (3) - query the SELinux policy database in the kernel
selabel_close (3)    - userspace SELinux labeling interface
selabel_open (3)     - userspace SELinux labeling interface
select-default-iwrap (1) - Selects the user default ispell dictionary for use...
selinux_file_context_cmp (3) - Compare two SELinux security contexts excludin...
selinux_set_callback (3) - userspace SELinux callback facilities
selinux_user_contexts_path (3) - These functions return the paths to the acti...
selinux_usersconf_path (3) - These functions return the paths to the active S...
SET_ROLE (7)         - set the current user identifier of the current session
SET_SESSION_AUTHORIZATION (7) - set the session user identifier and the curre...
setcontext (2)       - get or set the user context
setcontext (3)       - get or set the user context
setegid (2)          - set effective user or group ID
seteuid (2)          - set effective user or group ID
setfsuid (2)         - set user identity used for filesystem checks
setfsuid32 (2)       - set user identity used for filesystem checks
setregid (2)         - set real and/or effective user or group ID
setregid32 (2)       - set real and/or effective user or group ID
setresgid (2)        - set real, effective and saved user or group ID
setresgid32 (2)      - set real, effective and saved user or group ID
setresuid (2)        - set real, effective and saved user or group ID
setresuid32 (2)      - set real, effective and saved user or group ID
setreuid (2)         - set real and/or effective user or group ID
setreuid32 (2)       - set real and/or effective user or group ID
setuid (2)           - set user identity
setuid32 (2)         - set user identity
setusershell (3)     - get permitted user shells
sget_userns (9)      - find or create a superblock
skb_append_datato_frags (9) - append the user data to a skb
skb_copy_and_csum_datagram_msg (9) - Copy and checksum skb to user iovec.
skb_copy_ubufs (9)   - copy userspace skb frags buffers to kernel
smbpasswd (8)        - change a user's SMB password
snd_card_disconnect (9) - disconnect all APIs from the file-operations (user ...
snd_ctl_notify (9)   - Send notification to user-space for a control change
snd_lookup_minor_data (9) - get user data of a registered device
SSL_CTX_set_default_passwd_cb_userdata (3ssl) - set passwd callback for encry...
struct_prev_cputime (9) - snaphsot of system and user cputime
struct_sync_file (9) - sync file to export to the userspace
su (1)               - change user ID or become superuser
suexec (8)           - Switch user before executing external programs
suexec-custom (8)    - Switch User For Exec
suexec-pristine (8)  - Switch user before executing external programs
sulogin (8)          - Single-user login
swapcontext (3)      - manipulate user context
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-path (1)     - List and query system and user paths
systemd-sysusers (8) - Allocate system users and groups
systemd-sysusers.service (8) - Allocate system users and groups
systemd-user-sessions (8) - Permit user logins after boot, prohibit user logi...
systemd-user-sessions.service (8) - Permit user logins after boot, prohibit u...
systemd-user.conf (5) - System and session service manager configuration file
sysusers.d (5)       - Declarative allocation of system users and groups
tasksel (8)          - a user interface for installing tasks
telnet (1)           - user interface to the TELNET protocol
telnet.netkit (1)    - user interface to the TELNET protocol
ttyslot (3)          - find the slot of the current user's terminal in some file
ucf (1)              - Update Configuration File: preserve user changes in co...
udp (7)              - User Datagram Protocol for IPv4
udplite (7)          - Lightweight User Datagram Protocol
ui (3ssl)            - New User Interface
UI_add_error_string (3ssl) - New User Interface
UI_add_info_string (3ssl) - New User Interface
UI_add_input_boolean (3ssl) - New User Interface
UI_add_input_string (3ssl) - New User Interface
UI_add_user_data (3ssl) - New User Interface
UI_add_verify_string (3ssl) - New User Interface
ui_compat (3ssl)     - Compatibility user interface functions
UI_construct_prompt (3ssl) - New User Interface
UI_ctrl (3ssl)       - New User Interface
UI_dup_error_string (3ssl) - New User Interface
UI_dup_info_string (3ssl) - New User Interface
UI_dup_input_boolean (3ssl) - New User Interface
UI_dup_input_string (3ssl) - New User Interface
UI_dup_verify_string (3ssl) - New User Interface
UI_free (3ssl)       - New User Interface
UI_get0_result (3ssl) - New User Interface
UI_get0_user_data (3ssl) - New User Interface
UI_get_default_method (3ssl) - New User Interface
UI_get_method (3ssl) - New User Interface
UI_new (3ssl)        - New User Interface
UI_new_method (3ssl) - New User Interface
UI_OpenSSL (3ssl)    - New User Interface
UI_process (3ssl)    - New User Interface
UI_set_default_method (3ssl) - New User Interface
UI_set_method (3ssl) - New User Interface
ulimit (3)           - get and set user limits
unix2_chkpwd (8)     - helper binary that verifies the password of the curren...
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
usb_free_urb (9)     - frees the memory used by a urb when all users of it ar...
User::grent (3perl)  - by-name interface to Perl's built-in getgr*() functions
User::Identity (3pm) - maintains info about a physical person
User::Identity::Archive (3pm) - base class for archiving user information
User::Identity::Archive::Plain (3pm) - simple, plain text archiver
User::Identity::Collection (3pm) - base class for collecting roles of a user
User::Identity::Collection::Emails (3pm) - a collection of email roles
User::Identity::Collection::Locations (3pm) - a collection of locations
User::Identity::Collection::Systems (3pm) - a collection of system descriptions
User::Identity::Collection::Users (3pm) - a collection of users
User::Identity::Item (3pm) - general base class for User::Identity
User::Identity::Location (3pm) - physical location of a person
User::Identity::System (3pm) - physical system of a person
User::pwent (3perl)  - by-name interface to Perl's built-in getpw*() functions
user_clusters (5)    - File linking users to PostgreSQL clusters
user_namespaces (7)  - overview of Linux user_namespaces
useradd (8)          - create a new user or update default new user information
userdel (8)          - delete a user account and related files
usermod (8)          - modify a user account
users (1)            - print the user names of users currently logged in to t...
Variable::Magic (3pm) - Associate user-defined magic to variables from Perl.
vm_insert_page (9)   - insert single page into user vma
vm_insert_pfn (9)    - insert single pfn into user vma
vm_insert_pfn_prot (9) - insert single pfn into user vma with specified pgprot
vm_iomap_memory (9)  - remap memory to userspace
vmalloc_32_user (9)  - allocate zeroed virtually contiguous 32bit memory
vmalloc_user (9)     - allocate zeroed virtually contiguous memory for userspace
vmsplice (2)         - splice user pages into a pipe
wall (1)             - write a message to all users
who@ (1)             - prints the list of active users on a remote host.
whoami (1)           - print effective userid
wimax_msg (9)        - Send a message to user space
wimax_msg_alloc (9)  - Create a new skb for sending a message to userspace
wimax_msg_send (9)   - Send a pre-allocated message to user space
wnintro (1WN)        - WordNet user commands
write (1)            - send a message to another user
xdg-email (1)        - command line tool for sending mail using the user's pr...
xdg-open (1)         - opens a file or URL in the user's preferred application
xset (1)             - user preference utility for X
zshcontrib (1)       - user contributions to zsh
zshroadmap (1)       - informal introduction to the zsh manual The Zsh Manual...