A

• acct(5)process accounting file
• acl(5)Access Control Lists
• adjtime_config(5)information about hardware clock setting and drift factor
• apt_auth.conf(5)Login configuration file for APT sources and proxies
• apt_preferences(5)Preference control file for APT
• apt.conf(5)Configuration file for APT

B

• binfmt.d(5)Configure additional binary formats for executables at boot

C

• charmap(5)character set description file
• config(5)OpenSSL CONF library configuration files
• core(5)core dump file
• crontab(5)tables for driving cron

D

• deb(5)Debian binary package format
• deb-buildinfo(5)Debian build information file format
• deb-changelog(5)dpkg source packages' changelog file format
• deb-changes(5)Debian upload changes control file format
• deb-conffiles(5)package conffiles
• deb-control(5)Debian binary package control file format
• deb-extra-override(5)Debian archive extra override file
• deb-md5sums(5)package MD5 file digests
• deb-old(5)old style Debian binary package format
• deb-origin(5)Vendor-specific information files
• deb-override(5)Debian archive override file
• deb-postinst(5)package post-installation maintainer script
• deb-postrm(5)package post-removal maintainer script
• deb-preinst(5)package pre-installation maintainer script
• deb-prerm(5)package pre-removal maintainer script
• deb-shlibs(5)Debian shared library information file
• deb-split(5)Debian multi-part binary package format
• deb-src-control(5)Debian source package template control file format
• deb-src-files(5)Debian distribute files format
• deb-src-rules(5)Debian source package rules file
• deb-src-symbols(5)Debian's extended shared library template file
• deb-substvars(5)Debian source substitution variables
• deb-symbols(5)Debian's extended shared library information file
• deb-triggers(5)package triggers
• deb822(5)Debian RFC822 control data format
• depmod.d(5)Configuration directory for depmod
• dir_colors(5)configuration file for dircolors(1)
• dnssec-trust-anchors.d(5)DNSSEC trust anchor configuration files
• dpkg.cfg(5)dpkg configuration file
• dsc(5)Debian source package control file format

E

• e2fsck.conf(5)Configuration file for e2fsck
• elf(5)format of Executable and Linking Format (ELF) files
• environment.d(5)Definition of user service environment
• erofs(5)the Enhanced Read-Only File System
• ethers(5)Ethernet address to IP number database
• ext4(5)the second extended file system ext3 - the third extended file system ext4 - the fourth extended file system

F

• faillog(5)login failure logging file
• filesystems(5)Linux filesystem types: ext, ext2, ext3, ext4, hpfs, iso9660, JFS, minix, msdos, ncpfs nfs, ntfs, proc, Reiserfs, smb, sysv, umsdos, vfat, XFS, xiafs
• fips_config(5)OpenSSL FIPS configuration
• fstab(5)static information about the filesystems

G

• gai.conf(5)getaddrinfo(3) configuration file
• gdbinit(5)GDB initialization scripts
• gitattributes(5)Defining attributes per path
• gitformat-bundle(5)The bundle file format
• gitformat-chunk(5)Chunk-based file formats
• gitformat-commit-graph(5)Git commit-graph format
• gitformat-index(5)Git index format
• gitformat-pack(5)Git pack format
• gitformat-signature(5)Git cryptographic signature formats
• githooks(5)Hooks used by Git
• gitignore(5)Specifies intentionally untracked files to ignore
• gitmailmap(5)Map author/committer names and/or E-Mail addresses
• gitmodules(5)Defining submodule properties
• gitprotocol-capabilities(5)Protocol v0 and v1 capabilities
• gitprotocol-common(5)Things common to various protocols
• gitprotocol-http(5)Git HTTP-based protocols
• gitprotocol-pack(5)How packs are transferred over-the-wire
• gitprotocol-v2(5)Git Wire Protocol, Version 2
• gitrepository-layout(5)Git Repository Layout
• gitweb.conf(5)Gitweb (Git web interface) configuration file
• group(5)user group file
• gshadow(5)shadowed group file

H

• host.conf(5)resolver configuration file
• hostname(5)Local hostname configuration file
• hosts(5)static table lookup for hostnames
• hosts.equiv(5)list of hosts and users that are granted "trusted" r command access to your system

I

• integritytab(5)Configuration for integrity block devices
• intro(5)introduction to file formats and filesystems
• iocost.conf(5)Configuration files for the iocost solution manager
• issue(5)prelogin message and identification file

J

• journald.conf(5)Journal service configuration files

L

• locale(5)describes a locale definition file
• locale.conf(5)Configuration file for locale settings
• localtime(5)Local timezone configuration file
• login.defs(5)shadow password suite configuration
• logind.conf(5)Login manager configuration files
• ltrace.conf(5)Configuration file for ltrace(1) .
• lvm.conf(5)Configuration file for LVM2

M

• machine-id(5)Local machine ID configuration file
• machine-info(5)Local machine information file
• man.conf(5)configuration file for man
• mandoc.db(5)manual page database
• mdadm.conf(5)configuration for management of Software RAID with mdadm
• mke2fs.conf(5)Configuration file for mke2fs
• modprobe.d(5)Configuration directory for modprobe
• modules-load.d(5)Configure kernel modules to load at boot
• modules.dep(5)Module dependency information
• moduli(5)Diffie-Hellman moduli
• motd(5)message of the day

N

• nanorc(5)GNU nano's configuration file
• networkd.conf(5)Global Network configuration files
• networks(5)network name information
• nologin(5)prevent unprivileged users from logging into the system
• nss(5)Name Service Switch configuration file
• nsswitch.conf(5)Name Service Switch configuration file

O

• org.freedesktop.hostname1(5)The D-Bus interface of systemd-hostnamed
• org.freedesktop.import1(5)The D-Bus interface of systemd-importd
• org.freedesktop.locale1(5)The D-Bus interface of systemd-localed
• org.freedesktop.LogControl1(5)D-Bus interface to query and set logging configuration
• org.freedesktop.login1(5)The D-Bus interface of systemd-logind
• org.freedesktop.machine1(5)The D-Bus interface of systemd-machined
• org.freedesktop.network1(5)The D-Bus interface of systemd-networkd
• org.freedesktop.portable1(5)The D-Bus interface of systemd-portabled
• org.freedesktop.systemd1(5)The D-Bus interface of systemd
• org.freedesktop.timedate1(5)The D-Bus interface of systemd-timedated
• os-release(5)Operating system identification

P

• passwd(5)the password file
• pci.ids(5)list of known identifiers related to PCI devices
• proc(5)process information, system information, and sysctl pseudo-filesystem
• proc_apm(5)advanced power management
• proc_buddyinfo(5)memory fragmentation
• proc_bus(5)installed buses
• proc_cgroups(5)control groups
• proc_cmdline(5)kernel boot arguments
• proc_config.gz(5)kernel build configuration
• proc_cpuinfo(5)CPU and system architecture information
• proc_crypto(5)ciphers provided by kernel crypto API
• proc_devices(5)major numbers and device groups
• proc_diskstats(5)disk I/O statistics
• proc_dma(5)ISA DMA channels
• proc_driver(5)empty dir
• proc_execdomains(5)ABI personalities (obsolete)
• proc_fb(5)frame buffer
• proc_filesystems(5)supported filesystems
• proc_fs(5)mounted filesystems
• proc_ide(5)IDE channels and attached devices
• proc_interrupts(5)number of interrupts
• proc_iomem(5)I/O memory map
• proc_ioports(5)I/O port regions
• proc_kallsyms(5)kernel exported symbols
• proc_kcore(5)physical memory
• proc_keys(5)in-kernel key management
• proc_kmsg(5)kernel messages
• proc_kpagecgroup(5)memory cgroups
• proc_kpagecount(5)count of mappings of physical pages
• proc_kpageflags(5)physical pages frame masks
• proc_loadavg(5)load average
• proc_locks(5)current file locks and leases
• proc_malloc(5)debug malloc (obsolete)
• proc_meminfo(5)memory usage
• proc_modules(5)loaded modules
• proc_mtrr(5)memory type range registers
• proc_partitions(5)major and minor numbers of partitions
• proc_pci(5)PCI devices
• proc_pid(5)process information
• proc_pid_attr(5)security-related attributes
• proc_pid_autogroup(5)group tasks for the scheduler
• proc_pid_auxv(5)exec(3) information
• proc_pid_cgroup(5)control group
• proc_pid_clear_refs(5)reset the PG_Referenced and ACCESSED/YOUNG bits
• proc_pid_cmdline(5)command line
• proc_pid_comm(5)command name
• proc_pid_coredump_filter(5)core dump filter
• proc_pid_cpuset(5)CPU affinity sets
• proc_pid_cwd(5)symbolic link to current working directory
• proc_pid_environ(5)initial environment
• proc_pid_exe(5)symbolic link to program pathname
• proc_pid_fd(5)file descriptors
• proc_pid_fdinfo(5)information about file descriptors
• proc_pid_io(5)I/O statistics
• proc_pid_limits(5)resource limits
• proc_pid_map_files(5)memory-mapped files
• proc_pid_maps(5)mapped memory regions
• proc_pid_mem(5)memory
• proc_pid_mountinfo(5)mount information
• proc_pid_mounts(5)mounted filesystems
• proc_pid_mountstats(5)mount statistics
• proc_pid_net(5)network layer information
• proc_pid_ns(5)namespaces
• proc_pid_numa_maps(5)NUMA memory policy and allocation
• proc_pid_oom_score(5)OOM-killer score
• proc_pid_oom_score_adj(5)OOM-killer score adjustment
• proc_pid_pagemap(5)mapping of virtual pages
• proc_pid_personality(5)execution domain
• proc_pid_projid_map(5)project ID mappings
• proc_pid_root(5)symbolic link to root directory
• proc_pid_seccomp(5)secure computing mode
• proc_pid_setgroups(5)allow or deny setting groups
• proc_pid_smaps(5)XXX: What does 's' in "smaps" stand for?
• proc_pid_stack(5)kernel stack
• proc_pid_stat(5)status information
• proc_pid_statm(5)memory usage information
• proc_pid_status(5)memory usage and status information
• proc_pid_syscall(5)currently executed system call
• proc_pid_task(5)thread information
• proc_pid_timers(5)POSIX timers
• proc_pid_timerslack_ns(5)timer slack in nanoseconds
• proc_pid_uid_map(5)user and group ID mappings
• proc_pid_wchan(5)wait channel
• proc_profile(5)kernel profiling
• proc_scsi(5)SCSI
• proc_slabinfo(5)kernel caches
• proc_stat(5)kernel system statistics
• proc_swaps(5)swap areas
• proc_sys(5)system information, and sysctl pseudo-filesystem
• proc_sys_abi(5)application binary information
• proc_sys_debug(5)debug
• proc_sys_dev(5)device-specific information
• proc_sys_fs(5)kernel variables related to filesystems
• proc_sys_kernel(5)control a range of kernel parameters
• proc_sys_net(5)networking
• proc_sys_proc(5)???
• proc_sys_sunrpc(5)Sun remote procedure call for NFS
• proc_sys_user(5)limits on the number of namespaces of various types
• proc_sys_vm(5)virtual memory subsystem
• proc_sysrq-trigger(5)SysRq function
• proc_sysvipc(5)System V IPC
• proc_tid_children(5)child tasks
• proc_timer_list(5)pending timers
• proc_timer_stats(5)timer statistics
• proc_tty(5)tty
• proc_uptime(5)system uptime
• proc_version(5)kernel version
• proc_vmstat(5)virtual memory statistics
• proc_zoneinfo(5)memory zones
• protocols(5)protocols definition file
• pstore.conf(5)PStore configuration file

R

• repart.d(5)Partition Definition Files for Automatic Boot-Time Repartitioning
• repertoiremap(5)map symbolic character names to Unicode code points
• resolv.conf(5)resolver configuration file
• rpc(5)RPC program number data base
• rsyncd.conf(5)configuration file for rsync in daemon mode

S

• securetty(5)list of terminals on which root is allowed to login
• services(5)Internet network services list
• shadow(5)shadowed password file
• shells(5)pathnames of valid login shells
• slabinfo(5)kernel slab allocator statistics
• sources.list(5)List of configured APT data sources
• ssh_config(5)OpenSSH client configuration file
• sshd_config(5)OpenSSH daemon configuration file
• subgid(5)the configuration for subordinate group ids
• subuid(5)the configuration for subordinate user ids
• sudo_logsrv.proto(5)Sudo log server protocol
• sudo_logsrvd.conf(5)configuration for sudo_logsrvd
• sudo_plugin(5)Sudo Plugin API
• sudo.conf(5)configuration for sudo front-end
• sudoers(5)default sudo security policy plugin
• sudoers_timestamp(5)Sudoers Time Stamp Format
• sysctl.conf(5)sysctl preload/configuration file
• sysctl.d(5)Configure kernel parameters at boot
• sysfs(5)a filesystem for exporting kernel objects
• systemd-sleep.conf(5)Suspend and hibernation configuration file
• systemd-system.conf(5)System and session service manager configuration files
• systemd.automount(5)Automount unit configuration
• systemd.device(5)Device unit configuration
• systemd.dnssd(5)DNS-SD configuration
• systemd.exec(5)Execution environment configuration
• systemd.kill(5)Process killing procedure configuration
• systemd.link(5)Network device configuration
• systemd.mount(5)Mount unit configuration
• systemd.netdev(5)Virtual Network Device configuration
• systemd.network(5)Network configuration
• systemd.path(5)Path unit configuration
• systemd.pcrlock(5)PCR measurement prediction files
• systemd.preset(5)Service enablement presets
• systemd.resource-control(5)Resource control unit settings
• systemd.scope(5)Scope unit configuration
• systemd.service(5)Service unit configuration
• systemd.slice(5)Slice unit configuration
• systemd.socket(5)Socket unit configuration
• systemd.swap(5)Swap unit configuration
• systemd.target(5)Target unit configuration
• systemd.timer(5)Timer unit configuration
• systemd.unit(5)Unit configuration
• sysupdate.d(5)Transfer Definition Files for Automatic Updates
• sysusers.d(5)Declarative allocation of system users and groups

T

• termcap(5)terminal capability database
• terminal-colors.d(5)configure output colorization for various utilities
• tmpfiles.d(5)Configuration for creation, deletion and cleaning of volatile and temporary files
• tmpfs(5)a virtual memory filesystem
• ttytype(5)terminal device to default terminal type mapping
• tzfile(5)timezone information

U

• udev.conf(5)Configuration for device event managing daemon
• user@.service(5)System units to start the user manager
• utmp(5)login records

V

• veritytab(5)Configuration for verity block devices

W

• whois.conf(5)alternative WHOIS servers list for whois client

X

• x509v3_config(5)X509 V3 certificate extension configuration format