fsck

fsck

Check the integrity of a filesystem or repair it. The filesystem should be unmounted at the time the command is run. It is a wrapper that calls fsck_hfs, fsck_apfs, fsck_msdos, fsck_exfat, and fsck_udf as needed. More information: https://keith.github.io/xcode-man-pages/fsck.8.html.

  • Check filesystem /dev/sdX, reporting any damaged blocks:

fsck {{/dev/sdX}}

  • Check filesystem /dev/sdX only if it is clean, reporting any damaged blocks and interactively letting the user choose to repair each one:

fsck -f {{/dev/sdX}}

  • Check filesystem /dev/sdX only if it is clean, reporting any damaged blocks and automatically repairing them:

fsck -fy {{/dev/sdX}}

  • Check filesystem /dev/sdX, reporting whether it has been cleanly unmounted:

fsck -q {{/dev/sdX}}

osx

airport Wireless network configuration utility.
bnepd A service that handles all Bluetooth network connections.
gmake This command is an alias of GNU `make`.
gchgrp This command is an alias of GNU `chgrp`.
ping Send ICMP ECHO_REQUEST packets to network hosts.
grm This command is an alias of GNU `rm`.
security Administer keychains, keys, certificates and the Security framework.
indent Change the appearance of a C/C++ program by inserting or deleting whitespace.
gprintenv This command is an alias of GNU `printenv`.
archey Stylishly display system information.
reboot Reboot the system.
deleted Keeps track of purgeable space and asks clients to purge when space is low.
dmesg Write the kernel messages to `stdout`.
gsed This command is an alias of GNU `sed`.
automountd An automatic mount/unmount daemon for `autofs`. Started on demand by `launchd`.
date Set or display the system date.
cloudd Backs the CloudKit feature.
ged This command is an alias of GNU `ed`.
gnice This command is an alias of GNU `nice`.
gsha512sum This command is an alias of GNU `sha512sum`.
gwhois This command is an alias of GNU `whois`.
gshuf This command is an alias of GNU `shuf`.
nvram Manipulate firmware variables.
gsha256sum This command is an alias of GNU `sha256sum`.
gecho This command is an alias of GNU `echo`.
xcodes Download, install and manage multiple Xcode versions.
gtr This command is an alias of GNU `tr`.
goku Manage Karabiner configuration.
gmd5sum This command is an alias of GNU `md5sum`.
gchown This command is an alias of GNU `chown`.
gpaste This command is an alias of GNU `paste`.
gseq This command is an alias of GNU `seq`.
warmd Controls caches used during startup and login.
ocspd This retrieves and caches Certificate Revocation Lists (CRLs) and Online Certificate Status Protocol (OCSP) responses for certificate verification.
csshx Cluster SSH tool for macOS.
ctkd SmartCard daemon.
fileicon Manage custom file and folder icons.
csrutil Manage the System Integrity Protection configuration.
gpinky This command is an alias of GNU `pinky`.
dhcp6d Stateless DHCPv6 server.
nettop Display updated information about the network.
photoanalysisd Analyze photo libraries for Memories, People, and scene or object based search.
fdesetup Set and retrieve FileVault related information.
xip Create or expand compressed files in a secure xip archive.
tag Edit tags on Mac OS X files (10.9 Mavericks and above).
pbpaste Send the contents of the clipboard to `stdout`.
gdir This command is an alias of GNU `dir`.
gtftp This command is an alias of GNU `tftp`.
genv This command is an alias of GNU `env`.
gnproc This command is an alias of GNU `nproc`.
diskutil Utility to manage local disks and volumes.
ghostname This command is an alias of GNU `hostname`.
gprintf This command is an alias of GNU `printf`.
cat Print and concatenate files.
grexec This command is an alias of GNU `rexec`.
xcode-select Switch between different versions of Xcode and the included developer tools.
yaa Create and manipulate YAA archives.
gtalk This command is an alias of GNU `talk`.
stat Display file status.
duti Set default applications for document types and URL schemes on macOS.
gbasename This command is an alias of GNU `basename`.
glibtoolize This command is an alias of GNU `libtoolize`.
gcsplit This command is an alias of GNU `csplit`.
shutdown Shutdown and reboot the system.
glibtool This command is an alias of GNU `libtool`.
launchctl Control Apple's `launchd` manager for launch daemons (system-wide services) and launch agents (per-user programs).
locate Find filenames quickly.
corebrightnessd Manage Night Shift.
gtac This command is an alias of GNU `tac`.
gbase32 This command is an alias of GNU `base32`.
usernoted Provides notification services.
plutil View, convert, validate, or edit property list ("plist") files.
gtouch This command is an alias of GNU `touch`.
orb Interface for OrbStack, a fast and lightweight container and virtual machine runtime for macOS.
gsplit This command is an alias of GNU `split`.
signal Simplified software signal facilities.
machine Print machine type.
dockutil Manage macOS dock items.
internetsharing Set up Internet Sharing.
iostat Report statistics for devices.
emond Event Monitor service that accepts events from various services, runs them through a simple rules engine, and takes action.
lpstat Display status information about the current classes, jobs, and printers.
diskutil-partitiondisk Utility to manage partitions inside disks and volumes.
gnl This command is an alias of GNU `nl`.
screencapture Utility to take screenshots and screen recordings.
whatis Search a set of database files for short descriptions of system commands for keywords.
pbcopy Copy data from `stdin` to the clipboard.
gcksum This command is an alias of GNU `cksum`.
ginstall This command is an alias of GNU `install`.
vpnd Listens for incoming VPN connections.
port Package manager for macOS.
aiac Use OpenAI to generate IaC configurations, utilities, queries and more.
system_profiler Report system hardware and software configuration.
sdef Get or generate a scripting definitions (`sdef`) file from a scriptable application.
nfcd This daemon controls the NFC controller.
dark-mode Control macOS dark mode.
asr Restore (copy) a disk image onto a volume.
gwho This command is an alias of GNU `who`.
xsand Xsan file system management daemon. Provides services for the Xsan file system.
wwand USB WWAN device configuration daemon.
gmkfifo This command is an alias of GNU `mkfifo`.
log View, export, and configure logging systems.
xcodes-runtimes Manage Xcode Simulator runtimes.
gstat This command is an alias of GNU `stat`.
gwhich This command is an alias of GNU `which`.
uuidgen Generate new UUID (Universally Unique IDentifier) strings.
sntp A very Simple Network Time Protocol client program.
gsum This command is an alias of GNU `sum`.
coreauthd A system daemon providing the `LocalAuthentication` framework.
gmktemp This command is an alias of GNU `mktemp`.
gindent This command is an alias of GNU `indent`.
mdls Display the metadata attributes for a file.
symptomsd Provides services for `Symptoms.framework`.
caffeinate Prevent macOS from sleeping.
getfileinfo Get information about a file in an HFS+ directory.
grealpath This command is an alias of GNU `realpath`.
icalbuddy Command-line utility for printing events and tasks from the macOS calendar database.
gusers This command is an alias of GNU `users`.
gcut This command is an alias of GNU `cut`.
apachectl Apache HTTP Server control interface for macOS.
opensnoop Track file opens on your system.
dd Convert and copy a file.
xartstorageremoted The xART Remote Storage Daemon. Receives save/fetch requests from the CoProcessor.
gcp This command is an alias of GNU `cp`.
gtrue This command is an alias of GNU `true`.
cal Print calendar information.
grlogin This command is an alias of GNU `rlogin`.
mas Command-line interface for the Mac App Store.
tmutil Utility for managing Time Machine backups. Most verbs require root privileges.
gegrep This command is an alias of GNU `egrep`.
bclm Set a custom charge limit on MacBooks.
biomesyncd Synchronizes data between devices registered to the same account.
xml2man Compile MPGL to mdoc.
xcodebuild Build Xcode projects.
vm_stat Show virtual memory statistics.
appsleepd Start app sleep services.
avbdeviced A service for managing Audio Video Bridging (AVB) devices.
gpathchk This command is an alias of GNU `pathchk`.
biometrickitd Get support for biometric operations.
sw_vers Print macOS operating system version information.
gtime This command is an alias of GNU `time`.
rargs Execute a command for each line of `stdin`.
ghead This command is an alias of GNU `head`.
fuser Display process IDs currently using files.
gwc This command is an alias of GNU `wc`.
say Convert text to speech.
guname This command is an alias of GNU `uname`.
open Open files, directories and applications.
securityd This manages security contexts and cryptographic operations.
as Portable GNU assembler.
bird This supports the syncing of iCloud and iCloud Drive.
g[ This command is an alias of GNU `[`.
spotify A command-line interface to Spotify.
applecamerad Camera manager.
gftp This command is an alias of GNU `ftp`.
airportd Manage wireless interfaces.
chpass Add or change user database information, including login shell and password.
gbase64 This command is an alias of GNU `base64`.
autoraise Automatically raise and/or focus a window when hovering over it with the mouse.
gunlink This command is an alias of GNU `unlink`.
softwareupdate Update macOS App Store apps.
gsha224sum This command is an alias of GNU `sha224sum`.
df Display an overview of the filesystem disk space usage.
gptx This command is an alias of GNU `ptx`.
fontd Make fonts available to the system.
gyes This command is an alias of GNU `yes`.
tart Build, run and manage macOS and Linux virtual machines (VMs) on Apple Silicon.
gtee This command is an alias of GNU `tee`.
glogger This command is an alias of GNU `logger`.
cfprefsd Start preferences services (`CFPreferences`, `NSUserDefaults`).
hdiutil Utility to create and manage disk images.
sips Apple Scriptable Image Processing System.
translationd Enables Translation features.
lsappinfo Control and query CoreApplicationServices about the app state on the system.
grmdir This command is an alias of GNU `rmdir`.
ps Information about running processes.
setfile Set file attributes on files in an HFS+ directory.
gtest This command is an alias of GNU `test`.
gls This command is an alias of GNU `ls`.
grcp This command is an alias of GNU `rcp`.
route Manually manipulate the routing tables.
arch Display the name of the system architecture, or run a command under a different architecture.
automount Read the `/etc/auto_master` file and mount `autofs` on the appropriate mount points to trigger the on-demand mounting of directories. Essentially, it's a way to manually initiate the system's automounting process.
gfind This command is an alias of GNU `find`.
xed Open files for editing in Xcode.
sntpd An SNTP server.
gln This command is an alias of GNU `ln`.
distnoted Start distributed notification services.
gtsort This command is an alias of GNU `tsort`.
gnohup This command is an alias of GNU `nohup`.
cot The Plain-Text Editor for macOS.
gshred This command is an alias of GNU `shred`.
valet A Laravel development environment that allows hosting sites via local tunnels on <http://example.test>.
look Display lines beginning with a prefix in a sorted file.
backupd Create Time Machine backups and manages its backup history.
tail Display the last part of a file.
networkquality Measure the network quality by connecting to the internet.
gchmod This command is an alias of GNU `chmod`.
ftxdiff Compare differences between two fonts.
gstty This command is an alias of GNU `stty`.
ipconfig View and control IP configuration state.
safeejectgpu Eject a GPU safely.
head Output the first part of files.
cut Cut out fields from `stdin` or files.
systemsetup Configure System Preferences machine settings.
afplay Command-line audio player.
networksetup Configuration tool for Network System Preferences.
istats Show various statistics such as the CPU temperature, fan speeds and battery status.
guniq This command is an alias of GNU `uniq`.
gstdbuf This command is an alias of GNU `stdbuf`.
gwhoami This command is an alias of GNU `whoami`.
uptime Tell how long the system has been running and other information.
gtty This command is an alias of GNU `tty`.
universalaccessd Get universal access services.
cvfsck Check and repair an Xsan file system volume.
sysctl Access kernel state information.
gcomm This command is an alias of GNU `comm`.
gtimeout This command is an alias of GNU `timeout`.
gruncon This command is an alias of GNU `runcon`.
ghostid This command is an alias of GNU `hostid`.
gpr This command is an alias of GNU `pr`.
osascript Run AppleScript or JavaScript for Automation (JXA).
llvm-lipo This command is an alias of `lipo`.
hidd HID library userland daemon.
ggroups This command is an alias of GNU `groups`.
bless Set volume boot capability and startup disk options.
gmknod This command is an alias of GNU `mknod`.
gunexpand This command is an alias of GNU `unexpand`.
autofsd Run `automount` on startup and network configuration change events.
mdutil Manage the metadata stores used by Spotlight for indexing.
scutil Manage system configuration parameters.
gbasenc This command is an alias of GNU `basenc`.
pmset Configure macOS power management settings, as one might do in System Preferences Energy Saver.
wc Count lines, words, or bytes.
pod Dependency manager for Swift and Objective-C Cocoa projects.
gdate This command is an alias of GNU `date`.
split Split a file into pieces.
kmutil Utility for managing kernel extensions (kexts) and kext collections on disk.
gtar This command is an alias of GNU `tar`.
timed Service that synchronizes system time (e.g. using NTP).
gping This command is an alias of GNU `ping`.
xsltproc Transform XML with XSLT to produce output (usually HTML or XML).
drutil Interact with DVD burners.
gchroot This command is an alias of GNU `chroot`.
mktemp Create a temporary file or directory.
auvaltool AudioUnit validation tool for Mac.
gexpand This command is an alias of GNU `expand`.
coredatad Schedules CloudKit operations for clients of NSPersistentCloudKitContainer.
gifconfig This command is an alias of GNU `ifconfig`.
xattr Utility to work with extended filesystem attributes.
coreaudiod Service for Core Audio, Apple's audio system.
herd An official Laravel PHP development environment for macOS.
gid This command is an alias of GNU `id`.
gmv This command is an alias of GNU `mv`.
gxargs This command is an alias of GNU `xargs`.
gcrane-completion Generate the autocompletion script for gcrane for the specified shell.
md5 Calculate MD5 cryptographic checksums.
god This command is an alias of GNU `od`.
ditto Copy files and directories.
gdnsdomainname This command is an alias of GNU `dnsdomainname`.
afinfo Audio file metadata parser for OS X.
gexpr This command is an alias of GNU `expr`.
gping6 This command is an alias of GNU `ping6`.
lldb The LLVM Low-Level Debugger.
qlmanage QuickLook server tool.
aa This command is an alias of `yaa`.
contactsd Manages the information in your contacts database.
gnumfmt This command is an alias of GNU `numfmt`.
gfgrep This command is an alias of GNU `fgrep`.
gupdatedb This command is an alias of GNU `updatedb`.
xctool Build Xcode projects.
uname Print details about the current machine and the operating system running on it.
glink This command is an alias of GNU `link`.
grsh This command is an alias of GNU `rsh`.
m Swiss Army Knife for macOS.
cloudphotod This synchronizes iCloud Photos.
carthage A dependency management tool for Cocoa applications.
gdf This command is an alias of GNU `df`.
wifi-password Get the password of the Wi-Fi.
mate General-purpose text editor for macOS.
java_home Return a value for `$JAVA_HOME` or execute command using this variable.
coreautha A system agent providing the `LocalAuthentication` framework.
mac-cleanup A modern macOS cleanup tool to remove caches and junk.
gjoin This command is an alias of GNU `join`.
gchcon This command is an alias of GNU `chcon`.
launchd Manages processes, both for the system and users.
gsort This command is an alias of GNU `sort`.
gdircolors This command is an alias of GNU `dircolors`.
gtelnet This command is an alias of GNU `telnet`.
glogname This command is an alias of GNU `logname`.
watchdogd Works with the Watchdog KEXT to ensure that the system is healthy and running.
ggrep This command is an alias of GNU `grep`.
w Show who is logged on and what they are doing.
wacaw Capture both still pictures and video from an attached camera.
mist MIST - macOS Installer Super Tool.
gsleep This command is an alias of GNU `sleep`.
bc An arbitrary precision calculator language.
systemsoundserverd Core Audio related daemon.
shortcuts Manage shortcuts.
mdfind List files matching a query.
webinspectord Relays commands between Web Inspector and remote targets like WKWebView.
gfalse This command is an alias of GNU `false`.
mysides Add, list and remove finder favorites.
shuf Generate random permutations.
gunits This command is an alias of GNU `units`.
gfold This command is an alias of GNU `fold`.
defaults Read and write macOS user configuration for applications.
top Display dynamic real-time information about running processes.
gsha1sum This command is an alias of GNU `sha1sum`.
textutil Manipulate text files of various formats.
chflags Change file or directory flags.
gdirname This command is an alias of GNU `dirname`.
codesign Create and manipulate code signatures for macOS.
gfmt This command is an alias of GNU `fmt`.
du Disk usage: estimate and summarize file and directory space usage.
darwin-rebuild Rebuild and switch to a Nix-based Darwin (macOS) system configuration.
gsha384sum This command is an alias of GNU `sha384sum`.
wps Assists AirPort in connecting to a network using Wireless Protected Setup.
gmkdir This command is an alias of GNU `mkdir`.
gtruncate This command is an alias of GNU `truncate`.
brightness Get and set the brightness level of all internal and certain external displays.
secd Controls access to and modification of keychain items.
notifyd Notification server.
dot_clean Merge ._* files with corresponding native files.
wifivelocityd XPC helper for performing system context actions for the WiFiVelocity framework.
sed Edit text in a scriptable manner.
gcat This command is an alias of GNU `cat`.
base64 Encode or decode file or `stdin` to/from base64, to `stdout` or another file.
spctl Manage the security assessment policy subsystem.
guptime This command is an alias of GNU `uptime`.
gtail This command is an alias of GNU `tail`.
gdd This command is an alias of GNU `dd`.
glocate This command is an alias of GNU `locate`.
pkgutil Query and manipulate Mac OS X Installer packages and receipts.
terminal-notifier Send macOS User Notifications.
rev Reverse lines of text.
herd-list List available commands in the Herd PHP platform.
fsck Check the integrity of a filesystem or repair it. The filesystem should be unmounted at the time the command is run.
gsync This command is an alias of GNU `sync`.
watchlistd Manage the Apple TV app's watch list.
xcrun Run or locate development tools and properties.
gkill This command is an alias of GNU `kill`.
lipo Handle Mach-O Universal Binaries.
dtrace A simple interface to invoke the D language compiler, retrieve buffered trace, and print traced data from the DTrace kernel facility.
gfactor This command is an alias of GNU `factor`.
gvdir This command is an alias of GNU `vdir`.
netstat Display network-related information such as open connections, open socket ports, etc.
greadlink This command is an alias of GNU `readlink`.
gtraceroute This command is an alias of GNU `traceroute`.
yabai A tiling window manager for macOS based on binary space partitioning.
filecoordinationd Coordinates access to files by multiple processes (`NSFileCoordinator`, `NSFilePresenter`).
gb2sum This command is an alias of GNU `b2sum`.
photolibraryd This handles all photo library requests.
gpwd This command is an alias of GNU `pwd`.