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Angel Reyes
Angel Reyes

The Linux Command Line: A Free and Comprehensive E-book by William Shotts



- The command line has many advantages over graphical user interfaces, such as speed, flexibility, automation, and access to more features and tools. H2: How to access the command line in Linux? - There are different ways to access the command line in Linux, depending on your desktop environment and preferences. - Some common methods are using a terminal emulator, a virtual console, or a remote connection. H2: How to download files from the command line in Linux? - There are many commands and tools that can help you download files from the command line in Linux, such as wget, curl, aria2, rsync, scp, and more. - Each tool has its own syntax, options, and features that you need to learn and use according to your needs and preferences. H3: wget - wget is one of the most popular and widely used commands for downloading files from the web. - wget can download single files, multiple files, entire directories, or even entire websites with various options and features. - wget can also resume interrupted downloads, support HTTP, HTTPS, FTP, and other protocols, and work in the background or in scripts. H3: curl - curl is another powerful and versatile command for downloading files from the web. - curl can do many things that wget can do, but also has some additional features and capabilities, such as uploading files, sending HTTP requests, testing APIs, and more. - curl can also support more protocols than wget, such as SFTP, SMTP, IMAP, POP3, and more. H3: aria2 - aria2 is a multi-protocol and multi-source command-line download utility that can speed up your downloads by using multiple connections and sources. - aria2 can support HTTP, HTTPS, FTP, BitTorrent, Metalink, and other protocols, and can also resume broken downloads, limit bandwidth usage, and work in the background or in scripts. H3: rsync - rsync is a fast and reliable command for synchronizing files and directories between local and remote locations. - rsync can use delta-transfer algorithm to transfer only the changed parts of files, which can save bandwidth and time. - rsync can also preserve file attributes, permissions, ownerships, timestamps, and more. H3: scp - scp is a secure copy command that can transfer files between local and remote hosts using SSH protocol. - scp can encrypt the data during the transfer process, which can protect your privacy and security. - scp can also use wildcards, compression, recursion, and other options to customize your file transfers. H2: How to find and choose the best books on Linux command line? - There are many books on Linux command line available online or offline for different levels of learners and users. - Some of the factors that you need to consider when choosing a book on Linux command line are your goals, interests, skills, budget, format preference (e-book or print), reviews ratings recommendations feedbacks etc. H3: Some examples of books on Linux command line - The Linux Command Line by William Shotts: A comprehensive introduction to the Linux command line with practical examples and exercises. - Linux Command Line and Shell Scripting Bible by Richard Blum and Christine Bresnahan: A comprehensive reference and guide to the Linux command line and shell scripting with Bash. - How Linux Works by Brian Ward: A detailed explanation of how the Linux system works behind the scenes with clear diagrams and examples. - The Art of Command Line by Joshua Levy: A concise collection of tips and tricks for mastering the command line with various topics and resources. - Linux Pocket Guide by Daniel J. Barrett: A handy reference for the most common and useful commands and features of the Linux command line. H2: Conclusion - Summarize the main points and benefits of the article. - Provide a call to action for the readers to download and read the books on Linux command line. H2: FAQs - Q: How do I install the commands and tools for downloading files from the command line in Linux? - A: You can use your distribution's package manager to install the commands and tools that you need. For example, on Ubuntu and Debian based distributions, you can use the apt command: sudo apt install wget curl aria2 rsync scp - Q: How do I check the progress and status of my downloads from the command line in Linux? - A: Most of the commands and tools for downloading files from the command line in Linux will show you some information about the progress and status of your downloads, such as the file size, download speed, time elapsed, time remaining, etc. You can also use some options or flags to customize the output of these commands and tools. For example, you can use the -v (verbose) option to show more details, or the -q (quiet) option to show less details. - Q: How do I cancel or pause my downloads from the command line in Linux? - A: You can use the Ctrl+C keyboard shortcut to cancel or interrupt your downloads from the command line in Linux. Some of the commands and tools for downloading files from the command line in Linux can also resume your downloads from where they left off. For example, you can use the -c (continue) option with wget or aria2 to resume your downloads. You can also use the Ctrl+Z keyboard shortcut to pause your downloads and send them to the background. You can then use the fg (foreground) command to resume them. - Q: How do I verify the integrity and authenticity of my downloads from the command line in Linux? - A: You can use some commands and tools to verify the integrity and authenticity of your downloads from the command line in Linux, such as checksums, signatures, certificates, etc. For example, you can use the md5sum or sha256sum commands to calculate and compare the checksums of your downloads with the ones provided by the source. You can also use the gpg or openssl commands to verify the signatures or certificates of your downloads with the ones provided by the source. - Q: How do I open or view my downloads from the command line in Linux? - A: You can use some commands and tools to open or view your downloads from the command line in Linux, depending on their file types and formats. For example, you can use the cat or less commands to view text files, the xdg-open or mimeopen commands to open files with their default applications, or some specific commands or tools for some specific file types or formats, such as pdfinfo for PDF files, file for file information, etc. Table 2: Article with HTML formatting Download in Command Line Linux Book: A Complete Guide




If you are a Linux user or enthusiast, you might have heard about or used the command line before. The command line is a text-based interface that allows you to interact with your computer using commands. It is one of the most powerful and essential features of Linux that can help you perform various tasks efficiently and effectively.




download in command line linux book



In this article, we will show you how to download files from the command line in Linux using different commands and tools. We will also introduce you to some of the best books on Linux command line that you can download and read to learn more about this topic. By reading this article, you will be able to:



  • Understand what is the command line and why use it.



  • Access the command line in Linux using different methods.



  • Download files from the command line in Linux using different commands and tools.



  • Find and choose the best books on Linux command line.



What is the command line and why use it?




The command line is a text-based interface that allows you to interact with your computer using commands. Commands are instructions that tell your computer what to do. You can type commands in a terminal window or a console screen and press Enter to execute them.


The command line has many advantages over graphical user interfaces (GUIs), such as:



  • Speed: The command line can be faster than GUIs because it requires less resources and overheads. You can also use keyboard shortcuts and aliases to type commands faster.



How to access the command line in Linux?




There are different ways to access the command line in Linux, depending on your desktop environment and preferences. Some of the common methods are:



  • Using a terminal emulator: A terminal emulator is a program that simulates a terminal window on your graphical desktop. You can launch a terminal emulator from your menu, panel, or keyboard shortcut and type commands in it. There are many terminal emulators available for Linux, such as GNOME Terminal, Konsole, XTerm, Terminator, etc.



  • Using a virtual console: A virtual console is a text-only screen that you can access by pressing Ctrl+Alt+F1 to F6 keys. You can switch back to your graphical desktop by pressing Ctrl+Alt+F7 key. You can log in to a virtual console with your username and password and type commands in it. A virtual console can be useful when your graphical desktop is not working or you need more resources.



  • Using a remote connection: A remote connection is a way to access the command line of another computer over a network. You can use protocols such as SSH (Secure Shell) or Telnet to connect to a remote computer and type commands in it. You can also use tools such as PuTTY or MobaXterm to connect to a remote computer from your Windows machine.



How to download files from the command line in Linux?




There are many commands and tools that can help you download files from the command line in Linux, such as wget, curl, aria2, rsync, scp, and more. Each tool has its own syntax, options, and features that you need to learn and use according to your needs and preferences.


In this section, we will introduce you to some of the most popular and widely used commands and tools for downloading files from the command line in Linux and show you some examples of how to use them.


wget




wget is one of the most popular and widely used commands for downloading files from the web. wget can download single files, multiple files, entire directories, or even entire websites with various options and features. wget can also resume interrupted downloads, support HTTP, HTTPS, FTP, and other protocols, and work in the background or in scripts.


To install wget on Ubuntu and Debian based distributions, you can use the apt command:


sudo apt install wget


To download a file or webpage using wget, you just need to provide the URL of the file or webpage. It will download the file with its original name in the directory you are in.


wget URL


To download multiple files, youll have to save their URLs in a text file and provide that text file as input to wget like this:


wget -i download_files.txt


To download files with a different name using wget, you can use the -O (uppercase O) option to provide the output filename while downloading.


wget -O filename URL


To download a folder using wget, you can use the recursive option -r and provide the URL of the folder.


wget -r URL


To download an entire website using wget, you can use the mirror option -m and provide the URL of the website. You can also use some additional options such as --convert-links to convert links so that internal links are pointed to downloaded resources instead of web and --page-requisites to download additional things like style sheets so that the pages look better offline.


wget -m --convert-links --page-requisites URL


curl




sending HTTP requests, testing APIs, and more. curl can also support more protocols than wget, such as SFTP, SMTP, IMAP, POP3, and more.


To install curl on Ubuntu and Debian based distributions, you can use the apt command:


sudo apt install curl


To download a file or webpage using curl, you just need to provide the URL of the file or webpage. It will display the content of the file or webpage on the standard output. You can use the -o (lowercase o) option to save the output to a file.


curl URL -o filename


To download multiple files using curl, you can use the -O (uppercase O) option and provide multiple URLs. It will download each file with its original name.


curl -O URL1 URL2 URL3 ...


To download files with a different name using curl, you can use the -o (lowercase o) option and provide a filename for each URL using curly braces and commas.


curl -o filename1URL1,filename2URL2,filename3URL3 ...


To download files from a remote server using curl, you can use the -u (user) option and provide your username and password for authentication. You can also use the protocol prefix such as sftp:// or ftp:// before the URL.


curl -u username:password URL -o filename


To upload files to a remote server using curl, you can use the -T (upload) option and provide the local file name and the remote URL. You can also use the protocol prefix such as sftp:// or ftp:// before the URL.


curl -T filename -u username:password URL


aria2




aria2 is a multi-protocol and multi-source command-line download utility that can speed up your downloads by using multiple connections and sources. aria2 can support HTTP, HTTPS, FTP, BitTorrent, Metalink, and other protocols, and can also resume broken downloads, limit bandwidth usage, and work in the background or in scripts.


To install aria2 on Ubuntu and Debian based distributions, you can use the apt command:


sudo apt install aria2


To download a file using aria2, you just need to provide the URL of the file. It will download the file with its original name in the directory you are in.


aria2c URL


To download multiple files using aria2, you can provide multiple URLs as arguments. It will download each file with its original name.


aria2c URL1 URL2 URL3 ...


To download files with a different name using aria2, you can use the -o (output) option and provide a filename for each URL using square brackets and commas.


aria2c [URL1] -o filename1 [URL2] -o filename2 [URL3] -o filename3 ...


To download files from multiple sources using aria2, you can use the -Z (force-sequential) option and provide multiple URLs or torrent files as arguments. It will download each file from all available sources simultaneously.


aria2c -Z URL1 URL2 torrent1 torrent2 ...


To resume a broken download using aria2, you can use the -c (continue) option and provide the same URL or torrent file as before. It will resume the download from where it left off.


rsync




rsync is a fast and reliable command for synchronizing files and directories between local and remote locations. rsync can use delta-transfer algorithm to transfer only the changed parts of files, which can save bandwidth and time. rsync can also preserve file attributes, permissions, ownerships, timestamps, and more.


To install rsync on Ubuntu and Debian based distributions, you can use the apt command:


sudo apt install rsync


To download files or directories using rsync, you need to provide the source and destination paths as arguments. You can use a local path or a remote path with the username@host: prefix. You can also use some options such as -a (archive) to preserve file attributes, -z (compress) to compress data during transfer, -v (verbose) to show progress and details, etc.


rsync options source destination


To download a file using rsync, you can provide the file name as the source and destination paths.


rsync -avz username@host:file.txt file.txt


To download a directory using rsync, you can provide the directory name as the source and destination paths. You need to add a trailing slash / to the source path to indicate that it is a directory.


rsync -avz username@host:directory/ directory/


scp




scp is a secure copy command that can transfer files between local and remote hosts using SSH protocol. scp can encrypt the data during the transfer process, which can protect your privacy and security. scp can also use wildcards, compression, recursion, and other options to customize your file transfers.


To install scp on Ubuntu and Debian based distributions, you can use the apt command:


sudo apt install openssh-client


To download files or directories using scp, you need to provide the source and destination paths as arguments. You can use a local path or a remote path with the username@host: prefix. You can also use some options such as -r (recursive) to copy directories, -C (compress) to compress data during transfer, -P (port) to specify a port number, etc.


scp options source destination


To download a file using scp, you can provide the file name as the source and destination paths.


scp -C username@host:file.txt file.txt


To download a directory using scp, you can provide the directory name as the source and destination paths. You need to use the -r option to copy directories.


How to find and choose the best books on Linux command line?




There are many books on Linux command line available online or offline for different levels of learners and users. Some of the books are free and some are paid. Some of the books are in e-book format and some are in print format. Some of the books are comprehensive and some are concise. Some of the books are beginner-friendly and some are advanced.


So how do you find and choose the best books on Linux command line that suit your needs and preferences? Here are some of the factors that you need to consider when choosing a book on Linux command line:



  • Your goals: What do you want to achieve by reading a book on Linux command line? Do you want to learn the basics or master the advanced topics? Do you want to use the command line for personal or professional purposes? Do you want to use the command line for specific tasks or general purposes?



  • Your interests: What are you interested in learning about the command line? Do you want to learn about the history and philosophy of the command line? Do you want to learn about the syntax and structure of the commands? Do you want to learn about the features and functions of the commands? Do you want to learn about the tips and tricks of using the command line?



  • Your skills: What is your current level of knowledge and experience with the command line? Are you a beginner, intermediate, or advanced user? How comfortable are you with typing commands and reading outputs? How familiar are you with different commands and tools?



  • Your budget: How much are you willing to spend on a book on Linux command line? Do you prefer free or paid books? Do you prefer e-books or print books? How much value do you expect from a book on Linux command line?



  • Your format preference: How do you like to read a book on Linux command line? Do you prefer e-books or print books? Do you prefer reading on a computer, tablet, phone, or e-reader? Do you prefer reading online or offline? Do you prefer reading in color or black-and-white?



  • Reviews, ratings, recommendations, feedbacks, etc.: What do other people say about a book on Linux command line? How many reviews, ratings, recommendations, feedbacks, etc. does a book have? What are the positive and negative aspects of a book? How credible and trustworthy are the sources of information?



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