Linux Commands Examples

A great documentation place for Linux commands

use wildcards (*,?): example, bz* will match bzless and bzmore


u1sdtool - command line utility for controlling ubuntuone-syncdaemon
ubuntu-bug - file a bug report using Apport, or update an existing report
ubuntuone-control-panel-qt - control panel for Ubuntu One
ucf - Update Configuration File: preserve user changes in configuration files
ucfq - query the ucf database
ucfr - Update Configuration File Registry: associate packages with configuration files
ucs2any - generate BDF fonts containing subsets of ISO 10646-1 codepoints
udevadm - udev management tool
udevd - event managing daemon
udisks - udisks command line tool
udisks-tcp-bridge - udisks TCP/IP bridge
udisksctl - The udisks command line tool
ufw - program for managing a netfilter firewall
ul - do underlining
ulockmgr_server - Lock Manager Server for FUSE filesystems
umbrello - a UML modelling tool and code generator
umount - unmount file systems
uname - print system information
unattended-upgrade - automatic installation of security (and other) upgrades
uncompress - gzip, gunzip, zcat - compress or expand files
unexpand - convert spaces to tabs
unicode_start - put keyboard and console in unicode mode
unicode_stop - revert keyboard and console from unicode mode
uniq - report or omit repeated lines
unity - wrapper for starting the unity shell and handling fallback
unity-greeter - LightDM greeter for the Unity desktop
unix_chkpwd - Helper binary that verifies the password of the current user
unix_update - Helper binary that updates the password of a given user
unlink - call the unlink function to remove the specified file
unlzma - , lzcat Compress or decompress .xz and .lzma files
unpaper - Post-processing tool for scanned sheets of paper.
unrar - extract files from rar archives
unshare - run program with some namespaces unshared from parent
unstr - dump strings in pointer order
unwrapdiff - demangle word-wrapped patches
unxz - , xzcat, lzma, unlzma, lzcat Compress or decompress .xz and .lzma files
unzip - list, test and extract compressed files in a ZIP archive
unzipsfx - self-extracting stub for prepending to ZIP archives
update-alternatives - maintain symbolic links determining default commands
update-apt-xapian-index - rebuild the Apt Xapian Index
update-binfmts - maintain registry of executable binary formats
update-ca-certificates - update /etc/ssl/certs and certificates.crt
update-catalog - create or update entry in SGML catalog file
update-cracklib - Regenerate cracklib dictionary
update-default-aspell - rebuild aspell database and emacsen stuff
update-default-ispell - update default ispell dictionary
update-default-wordlist - update default wordlist
update-desktop-database - Build cache database of MIME types handled by desktop files
update-dictcommon-aspell - rebuild aspell database and emacsen stuff
update-dictcommon-hunspell - rebuild hunspell database and emacsen stuff
update-fmtlang - update various TeX-related configuration files
update-fmtutil - fmtutil, update-fmtlang - update various TeX-related configuration files
update-fonts-alias - compile fonts.alias files
update-fonts-dir - compile fonts.dir files
update-fonts-scale - generate fonts.scale files
update-gconf-defaults - generate GConf defaults shipped in Debian packages
update-grub - stub for grub-mkconfig
update-grub-gfxpayload - update /boot/grub/gfxblacklist.txt
update-grub2 - stub for grub-mkconfig
update-icon-caches - Update wrapper script for the icon caches
update-icon-caches.gtk2 - Update wrapper script for the icon caches
update-inetd - create, remove, enable or disable entry in /etc/inetd.conf
update-info-dir - update or create index file from all installed info files in directory
update-initramfs - generate an initramfs image
update-java-alternatives - update alternatives for jre/sdk installations
update-language - fmtutil, update-fmtlang - update various TeX-related configuration files
update-language-dat - fmtutil, update-fmtlang - update various TeX-related configuration files
update-language-def - fmtutil, update-fmtlang - update various TeX-related configuration files
update-language-lua - fmtutil, update-fmtlang - update various TeX-related configuration files
update-manager - graphical management of software packages updates
update-mime - create or update MIME information
update-mime-database - a program to build the Shared MIME-Info database cache
update-passwd - safely update /etc/passwd, /etc/shadow and /etc/group
update-pciids - download new version of the PCI ID list
update-python-modules - byte-compile python modules
update-rc.d - install and remove System-V style init script links
update-software-center - Update the database for software-center
update-texmf - shell script to generate /etc/texmf/texmf.cnf
update-texmf-config - script used in maintainer scripts to trigger tex-common actions
update-updmap - generate updmap.cfg from files in /etc/texmf/updmap.d/
update-usbids - download new version of the USB ID list
update-xmlcatalog - maintain XML catalog files
updatedb - update a database for mlocate
updmap - sys - manage TeX font maps, system-wide
updmap-sys - manage TeX font maps, system-wide
upower - UPower command line tool
upstart-event-bridge - Bridge between system Upstart and session Upstart
upstart-file-bridge - Bridge between Upstart and inotify
upstart-socket-bridge - Bridge between Upstart and sockets
upstart-udev-bridge - Bridge between Upstart and udev
uptime - Tell how long the system has been running.
ureadahead - Read files in advance during boot
usb-creator-gtk - Ubuntu startup disk creation tool for Gtk+
usb-devices - print USB device details
usbmuxd - iPhone/iPod Touch USB multiplex server daemon
usb_modeswitch - switch mode of "multi-state" USB devices
usb_printerid - prints the ID of the printer on a USB port
useradd - create a new user or update default new user information
userdel - delete a user account and related files
usermod - modify a user account
users - print the user names of users currently logged in to the current host
usewithtor - Shell wrapper to simplify the use of the torsocks(8) library to transparently allow an application to use a SOCKS proxy.
uuidd - UUID generation daemon
uuidgen - create a new UUID value
uvcdynctrl - libwebcam command line tool
uvcdynctrl-0.2.2 - libwebcam command line tool
uxterm - X terminal emulator for Unicode (UTF-8) environments
uz - gunzips and extracts a gzip’d tar’d archive

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