The Linux command line is a text interface to your computer. COMMAND LINE CRASH COURSE 5 | P a g e The Setup In this book you will be instructed to do three things: Do some things in your shell (command line, Terminal, PowerShell). The following pages are intended to give you a solid foundation in how to use the terminal, to get the computer to do useful work for you. We have given special priority to Linux commands and switches, scripting, services and applications, access control, process control, user management, database management, web services, etc. Lab. The Linux command line is a text interface to your computer. We can use the That’s good, but perhaps the choice of backup name could be better. Detailed answers to any questions you might have
It’s also available as a printed volume, should you find yourself caught by the command line bug and wanting a paper reference. To avoid re-typing each command after the first, use the Now we know how to move, copy and rename files and directories. Lop off the last pipe to see the output of the command for a better idea of what’s happening. during the installation. As you’ve seen, using “/” at the start of your path means “starting from the root directory”. o µ o Z ] Ì ( } Z } ( Z P v X d Z ] Ì } ( P v o µ o Ç µ ] v P Linux is a multi-user operating system, which means that more … You can either use the This tutorial has only been a brief introduction to the Linux command line. Exercise 3 - more,less,head,tail. In fact it’s usually referred to as the On the subject of synonyms, another way of looking at the prompt is to say that there’s a line in the terminal into which you type commands. Exercise 5 - find,xargs.
applicable)Log in with the user name and password you made for yourself Log in log out, password, find partition of home directory, display search path, list files in reverse alphabetical order, change file permissions, cat, file, grep, top, ps, find, kill, xclock commands, find current TTY, change system run level, find kernel loaded, use sleep to create a reminder, count invisible files in home directory, display limits on resource usage, customize terminal window, add an applet to task bar, install printer, save a file on USB, etc.10 Services exercises&examples: find version of “openssh-server” installed, view the status of the ssh server, stop Apache web server, display free disk space, top command, view log files in real time, etc.40 Exercises: create txt file and display content, make a copy of file, check size (bytes) of file, rename and move file, create and remove directory, etc.0 Exercises: untar files, invoke emacs, list all processes running in the background, VI modes, mv, cp, mkdir, touch, ls, touch, awk, head, tail commands, create, concatanate and display files, compare files, extract info from files, display files which start with word…11 Examples: sudo, “inst”, installation, services, ip, root.50 Exercises: I/O redirection, grep, regex, scripting, interfaces, cURL, lamp.Regex to match well formed phone numbers, search for numbers with dashes, count words, access command-line arguments from a python script, access and use the Stanford computers (SSH), interact with a server via the shell (FTP), download a photo using CURL, etc.12 Exercises: put scripts into a file, upload file with FTP,print all lines with phone numbers (grep), email file, sed, awk, commands, zip file, create arrays & variables, write a “calculator” program in a script, conditionals, script to prompt the user for input, loops, functions.30 Exercises: copy, move, rename file, change passwords, display the first 5 lines of file, text editor, more, ls commands, etc.50 Exercises: use man, alias, rsync, find, gnuplot, bc commands, log on to a node with ssh, set up public & private keys, write a bash script that lists all files and subdirectories from November 2011, list the number of image files of the current month, create a proxyConfig, plot some real data points, calculate arithmetic mean, find max/min in data set, etc.8 Exercises shell scripting & mock interview questions: transform csv, remove punctuations, valid phone number and email, sort by frequency, integer to roman number, etc.25 Exercises: change passwords, unpack tar file, rename directory, create packed file, check your disk space, remove read and execute permissions, change to another group, less, cat, more commands, explore Gnome, copy files, text editor, ssh, etc.5 Problems, 1 challenge: script to ask user to enter his name, display sum of integers, print parameters in reverse order and so on.30 Exercises POSIX threads: create subdirectory and list content, créate program with several threads, thread scheduling, exiting, joining, condition variables, etc.50 Exercises: script to perform mail merging, script to print out the usage, loop over the contents of the data file, scripts to work with text files, lines count, capitalize all the letters, Print out the contents of text file in sorted order, curl LINK command, find all ocurrences of a string build image web scrapper, stdin, stdout, stderr, and pipes, UNIX commands, etc.17 Certification Exams: 010-100,150, Linux Essentials Certificate of Achivement, 117-101, 117-201, 117-202 LPI level 2, 117-301,302,303 LPI Level36 Theory questions: under what circunstances would a kernel be compiled into a single binary file?, describe three different ways that threads could be implemented, advantages of dynamic linkage of libraries, etc.20 Job interview questions: how do you terminate a shell script if statement?, shell script to determine if a directory exists, What does 2>&1 mean?, ways to debug a shell script problem, etc.
2.5.1. Also explore over 69 similar quizzes in this category. Unpack gz file, find directories created, create subfolders, sort directory contents, list only files with an “a”, warnings, remove all lines of file that include a tag, change column format, etc.I/O redirection, text editor, Shell enviroment, printers, backup, networking, sound and video. If you’re coming from a Windows background you’re probably used to each drive having its own letter, with your main hard drive typically being “C:”.
If you’re ever in any doubt, the Note that the directory separator is a forward slash ("/"), not the backslash that you may be used to from Windows or DOS systemsNow your working directory is “/”.
Start Lab. It’s fortunate for us that the Linux command line includes some powerful tools for manipulating text content, and ways to join those tools together to create something more capable still.Let’s start with a simple question. In older systems it was a real user, with a real username (almost always “root”) that you could log in as if you had the password.
Yet still text prevails as a means to organise and categorise files. First, remind yourself what the Suppose we wanted to capture the output of that command as a text file that we can look at or manipulate further.
You see, that you'll get a number of files in a subdirectory named linux-exercises. These are some exercises to help you get the feel. mode.I am working in text/graphical mode. You can just close the window, but it’s better practice to log out of the shell.
Even though the Linux command-line provides thousands of commands, but only a few basic commands you need to learn to perform a day-to-day Linux task. Don’t be alarmed if you run a command and another prompt immediately appears, as that usually means the command succeeded. However currently, I really can't think of a useful task to use the command line.So how should I practice to let the material sink in? Lab.
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Looking at the line above, you can see that it’s two commands, Note that the spaces around the pipe character aren’t important, we’ve used them for clarity, but the following command works just as well, this time for telling us how many items are in the Phew! When adding a new user there is an option to create them as an administrator, in which case they will also be able to run superuser commands with If you enter your password when prompted you should see the contents of the For instructions targeting Ubuntu, a common appearance of Let’s install a new command line program from the standard Ubuntu repositories to illustrate this use of Going back to the command that actually installed the new program (In this section you’ve learnt about the dangers of the Before we conclude this tutorial it’s worth mentioning You can still work with the hidden file by making sure you include the dot when you specify its file name:You shouldn’t usually need to deal with hidden files, but occasionally instructions might require you to We’ve reached the end of this tutorial, and you should be back in your home directory now (use As a last step, let’s close the terminal. Learn about what you just did.
Especially, "jot down some notes".
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