How To Download Youtube Videos using Terminal Ubuntu 13.04

How To Download Youtube Videos using Terminal

First download youtube-dl
sudo apt-get install youtube-dl

Then go to Youtube and grab the address of the video that you want.
Once copied, type this in terminal to start downloading:
youtube-dl (paste the address here)

Example:

youtube-dl https://www.youtube.com/watch?v=V2y92H2kiIM

After it's finished downloading, check your Home folder, it should be there.
The file name is usually the same as the address i.e. V2y92H2kiIM.mp4 as shown in the following pictures.

1. Useful Commands in Ubuntu Linux

   • sudo ("superuser do"): A very common expression which indicates that the taken action must be verified with the admin password.
   • cd ("change directory"): With this command you can navigate your way throughout the system. Simply typing "cd" or "cd ~" will take you to the homefolder, which is the folder you are located in by default when starting up a Terminal session.
     • cd / - Takes you to the root directory.
     • cd .. - Takes you up one directory level.
     • cd - - Takes you to the previous directory.
   • pwd ("print working directory"): It displays your location in the system.
   • ls ("list"): Lists all files in current directory. Typing "ls ~" will show you the files in your home folder and adding on a folder name shows a list over the files in that specific folder. For example will "ls ~/Desktop" show you the files in yourDesktop folder.
   • cp ("copy"): Allows you to copy a file. To do so, add the name of the file you desire to copy along with the command as long as the file is located in the directory you have browsed to. Otherwise, type "cp ~/<file path>" in order to specify where the file you want copy is located.
   • mv ("move"): With this command, you can rename or move a file. If you want to rename the file "big" to "bang", you may want to type "mv big bang". This requires that you have browsed to the correct directory or that you specifies the file path. When typing "mv bang ~/Desktop", the file "bang" will be moved fromhome to Desktop, but if you want to rename the file as well, add the new file name next to the current name in the command.
   • rm ("remove"): Simply removes a file. Just specify the file path/file name.
     • rmdir ("remove directory"): Removes an 'empty' directory.
     • rm-r ("remove recursively"): Removes a directory along with its content. The fact that you should specify the directory path is self-explaining.
   • mkdir ("make directory"): Allows you to create a directory. Example: "mkdir private files" will create a directory named "private files" (Located in homedirectory unless you have browsed somewhere else with the terminal or specified a path for the new directory)
2. 2
   Now over to some help commands. The man ("manual") command displays the command manual (which actually makes this how-to unnecessary). The commandinfo displays some documentation.
   • man man: This manual page tells you about the manual page itself.
   • man intro: Gives you a brief introduction to Linux Commands.
   • info info: Introduces you to the info pages.
   • When you need information about a command, type "<command name>-h" or "<command name>--help", if the first rule did not work. You see, some command lines may not associate -h with --help.
3. 3
   Now, here follows some useful commands regarding system information.
   • df (display filesystem): Displays how much disk space on every mounted partition that is occupied. df -h uses MB and GB instead of blocks, which makes it more convenient.
   • du (directory usage): Displays how much space space a given directory plus all of its subdirectories uses. du -s gives you a summary while du -h translates the information to non - geekish.
   • The free command tells you how much space which is available for usage. To view the statistics in megabytes, type free -m.
   • uname -a: Prints all information about your system.
   • Isb_release -a: Prints information about your Linux distro.
   • top: This command igniates system monitoring, viewing RAM, CPU, and swap usage plus the total of running processes. Press "q" to shut down the monitor.
4. 4
   How to save time while typing in commands:
   • Use the Up and Down arrow keys to navigate your way through previously executed commands if you for example have to reuse them.
     
     
     
   • Hit Enter as soon as you're done with typing in your command.
     
     
     
   • The Tab key takes a guess on what command you are intending to use. If uncertain, it will view a list of possible choosable commands.
     
   • ctrl+R allows you to search for previously entered commands while the command history displays your entire command history.
     
     
     
5. 5
   This list provides you some common Linux commands:
   • A
     • adduser: Add a user to the system
     • addgroup: Add a group to the system
     • alias: Create an alias •
     • apropos: Search Help manual pages (man -k)
     • apt-get: Search for and install software packages (Debian/Ubuntu)
     • aptitude: Search for and install software packages (Debian/Ubuntu)
     • aspell: Spell Checker
     • awk: Find and Replace text, database sort/validate/index
   • B
     • basename: Strip directory and suffix from filenames
     • bash: GNU Bourne-Again SHell
     • bc: Arbitrary precision calculator language
     • bg: Send to background
     • break: Exit from a loop •
     • builtin: Run a shell builtin
     • bzip2: Compress or decompress named file(s)
   • C
     • cal: Display a calendar
     • case: Conditionally perform a command
     • cat: Display the contents of a file
     • cd: Change Directory
     • cfdisk: Partition table manipulator for Linux
     • chgrp: Change group ownership
     • chmod: Change access permissions
     • chown: Change file owner and group
     • chroot: Run a command with a different root directory
     • chkconfig: System services (runlevel)
     • cksum: Print CRC checksum and byte counts
     • clear: Clear terminal screen
     • cmp: Compare two files
     • comm: Compare two sorted files line by line
     • command: Run a command - ignoring shell functions •
     • continue: Resume the next iteration of a loop •
     • cp: Copy one or more files to another location
     • cron: Daemon to execute scheduled commands
     • crontab: Schedule a command to run at a later time
     • csplit: Split a file into context-determined pieces
     • cut: Divide a file into several parts
   • D
     • date: Display or change the date & time
     • dc: Desk Calculator
     • dd: Convert and copy a file, write disk headers, boot records
     • ddrescue: Data recovery tool
     • declare: Declare variables and give them attributes •
     • df: Display free disk space
     • diff: Display the differences between two files
     • diff3: Show differences among three files
     • dig: DNS lookup
     • dir: Briefly list directory contents
     • dircolors: Colour setup for `ls'
     • dirname: Convert a full pathname to just a path
     • dirs: Display list of remembered directories
     • dmesg: Print kernel & driver messages
     • du: Estimate file space usage
   • E
     • echo: Display message on screen •
     • egrep: Search file(s) for lines that match an extended expression
     • eject: Eject removable media
     • enable: Enable and disable builtin shell commands •
     • env: Environment variables
     • ethtool: Ethernet card settings
     • eval: Evaluate several commands/arguments
     • exec: Execute a command
     • exit: Exit the shell
     • expect: Automate arbitrary applications accessed over a terminal
     • expand: Convert tabs to spaces
     • export: Set an environment variable
     • expr: Evaluate expressions
   • F
     • false: Do nothing, unsuccessfully
     • fdformat: Low-level format a floppy disk
     • fdisk: Partition table manipulator for Linux
     • fg: Send job to foreground
     • fgrep: Search file(s) for lines that match a fixed string
     • file: Determine file type
     • find: Search for files that meet a desired criteria
     • fmt: Reformat paragraph text
     • fold: Wrap text to fit a specified width.
     • for: Expand words, and execute commands
     • format: Format disks or tapes
     • free: Display memory usage
     • fsck: File system consistency check and repair
     • ftp: File Transfer Protocol
     • function: Define Function Macros
     • fuser: Identify/kill the process that is accessing a file
   • G
     • gawk: Find and Replace text within file(s)
     • getopts: Parse positional parameters
     • grep: Search file(s) for lines that match a given pattern
     • groups: Print group names a user is in
     • gzip: Compress or decompress named file(s)
   • H
     • hash: Remember the full pathname of a name argument
     • head: Output the first part of file(s)
     • help: Display help for a built-in command •
     • history: Command History
     • hostname: Print or set system name
   • I
     • id: Print user and group id's
     • if: Conditionally perform a command
     • ifconfig: Configure a network interface
     • ifdown: Stop a network interface
     • ifup: Start a network interface up
     • import: Capture an X server screen and save the image to file
     • install: Copy files and set attributes
   • J
     • jobs: List active jobs •
     • join: Join lines on a common field
   • K
     • kill: Stop a process from running
     • killall: Kill processes by name
   • L
     • less: Display output one screen at a time
     • let: Perform arithmetic on shell variables •
     • ln: Make links between files
     • local: Create variables •
     • locate: Find files
     • logname: Print current login name
     • logout: Exit a login shell •
     • look: Display lines beginning with a given string
     • lpc: Line printer control program
     • lpr: Off line print
     • lprint: Print a file
     • lprintd: Abort a print job
     • lprintq: List the print queue
     • lprm: Remove jobs from the print queue
     • ls: List information about file(s)
     • lsof: List open files
   • M
     • make: Recompile a group of programs
     • man: Help manual
     • mkdir: Create new folder(s)
     • mkfifo: Make FIFOs (named pipes)
     • mkisofs: Create an hybrid ISO9660/JOLIET/HFS filesystem
     • mknod: Make block or character special files
     • more: Display output one screen at a time
     • mount: Mount a file system
     • mtools: Manipulate MS-DOS files
     • mtr: Network diagnostics (traceroute/ping)
     • mv: Move or rename files or directories
     • mmv: Mass Move and rename (files)
   • N
     • netstat: Networking information
     • nice: Set the priority of a command or job
     • nl: Number lines and write files
     • nohup: Run a command immune to hangups
     • notify-send: Send desktop notifications
     • nslookup: Query Internet name servers interactively
   • O
     • open: Open a file in its default application
     • op: Operator access
   • P
     • passwd: Modify a user password
     • paste: Merge lines of files
     • pathchk: Check file name portability
     • ping: Test a network connection
     • pkill: Stop processes from running
     • popd: Restore the previous value of the current directory
     • pr: Prepare files for printing
     • printcap: Printer capability database
     • printenv: Print environment variables
     • printf: Format and print data •
     • ps: Process status
     • pushd: Save and then change the current directory
     • pwd: Print Working Directory
   • Q
     • quota: Display disk usage and limits
     • quotacheck: Scan a file system for disk usage
     • quotactl: Set disk quotas
   • R
     • ram: ram disk device
     • rcp: Copy files between two machines
     • read: Read a line from standard input •
     • readarray: Read from stdin into an array variable •
     • readonly: Mark variables/functions as readonly
     • reboot: Reboot the system
     • rename: Rename files
     • renice: Alter priority of running processes
     • remsync: Synchronize remote files via email
     • return: Exit a shell function
     • rev: Reverse lines of a file
     • rm: Remove files
     • rmdir: Remove folder(s)
     • rsync: Remote file copy (Synchronize file trees)
   • S
     • screen: Multiplex terminal, run remote shells via ssh
     • scp: Secure copy (remote file copy)
     • sdiff: Merge two files interactively
     • sed: Stream Editor
     • select: Accept keyboard input
     • seq: Print numeric sequences
     • set: Manipulate shell variables and functions
     • sftp: Secure File Transfer Program
     • shift: Shift positional parameters
     • shopt: Shell Options
     • shutdown: Shutdown or restart linux
     • sleep: Delay for a specified time
     • slocate: Find files
     • sort: Sort text files
     • source: Run commands from a file `.'
     • split: Split a file into fixed-size pieces
     • ssh: Secure Shell client (remote login program)
     • strace: Trace system calls and signals
     • su: Substitute user identity
     • sudo: Execute a command as another user
     • sum: Print a checksum for a file
     • suspend: Suspend execution of this shell •
     • symlink: Make a new name for a file
     • sync: Synchronize data on disk with memory
   • T
     • tail: Output the last part of files
     • tar: Tape Archiver
     • tee: Redirect output to multiple files
     • test: Evaluate a conditional expression
     • time: Measure Program running time
     • times: User and system times
     • touch: Change file timestamps
     • top: List processes running on the system
     • traceroute: Trace Route to Host
     • trap: Run a command when a signal is set(bourne)
     • tr: Translate, squeeze, and/or delete characters
     • true: Do nothing, successfully
     • tsort: Topological sort
     • tty: Print filename of terminal on stdin
     • type: Describe a command •
   • U
     • ulimit: Limit user resources •
     • umask: Users file creation mask
     • umount: Unmount a device
     • unalias: Remove an alias •
     • uname: Print system information
     • unexpand: Convert spaces to tabs
     • uniq: Uniquify files
     • units: Convert units from one scale to another
     • unset: Remove variable or function names
     • unshar: Unpack shell archive scripts
     • until: Execute commands (until error)
     • useradd: Create new user account
     • usermod: Modify user account
     • users: List users currently logged in
     • uuencode: Encode a binary file
     • uudecode: Decode a file created by uuencode
   • V
     • v: Verbosely list directory contents (`ls -l -b')
     • vdir: Verbosely list directory contents (`ls -l -b')
     • vi: Text Editor
     • vmstat: Report virtual memory statistics
   • W
     • watch: Execute/display a program periodically
     • wc: Print byte, word, and line counts
     • whereis: Search the user's $path, man pages and source files for a program
     • which: Search the user's $path for a program file
     • while: Execute commands
     • who: Print all usernames currently logged in
     • whoami: Print the current user id and name (`id -un')
     • Wget: Retrieve web pages or files via HTTP, HTTPS or FTP
     • write: Send a message to another user
   • X and onwaard
     • xargs: Execute utility, passing constructed argument list(s)
     • xdg-open: Open a file or URL in the user's preferred application.
     • yes: Print a string until interrupted
     • .: Run a command script in the current shell. ### allows you to remark or comment without disturbing the Terminal.