Get man page
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The Linux command line offers a wealth of power and opportunity. If your memory is like mine then you find it hard to remember a large number of details.
Fortunately for us there is an easy to use resource that can inform us about all the great things we can do on the command line. That's what we're going to learn about in this section. I know you're keen and eager to get stuck into doing stuff, and we'll get started on that in the next section, I promise, first we need to learn how to use Manual pages however. The manual pages are a set of pages that explain every command available on your system including what they do, the specifics of how you run them and what command line arguments they accept.
Some of them are a little hard to get your head around but they are fairly consistent in their structure so once you get the hang of it it's not too bad. You invoke the manual pages with the following command:. It is possible to do a keyword search on the Manual pages. This can be helpful if you're not quite sure of what command you may want to use but you know what you want to achieve.
To be effective with this approach, you may need a few goes. It is not uncommon to find that a particular word exists in many manual pages. If you want to search within a manual page this is also possible.
A lot of being proficient at Linux is knowing which command line options we should use to modify the behaviour of our commands to suit our needs. A lot of these have both a long hand and short hand version. Above you will notice that to list all directory entries including hidden files we can use the option -a or --all remember from last section what files and directories beginning with a.
The long hand is really just a more human readable form. You may use either, they both do the same thing. One advantage of using long hand is that it can be easier for you to remember what your commands are doing. One advantage of using shorthand is that you can chain multiple together easier. As you can see, long hand command line options begin with two dashes -- and short hand options begin with a single dash -.
When we use a single dash we may invoke several options by placing all the letters representing those options together after the dash. There are a few instance where a particular option requires an argument to go with it and those options generally have to be placed separately along with their corresponding argument.
Don't worry too much about these special cases for now though. We'll point them out as we encounter them. Education is the kindling of a flame, not the filling of a vessel.
Contact Disclaimer. Linux Tutorial - 4. Manual Pages Tutorial Sections Introduction 1. The Command Line 2. Basic Navigation 3. More About Files 4. Manual Pages 5. File Manipulation 6. VI - Text Editor 7. Wildcards 8. Permissions 9. Filters Grep and Regular Expressions Piping and Redirection Process Management Manual Pages! Your reference on Linux. Sort entries alphabetically if none of -cftuvSUX nor --sort is specified.
Mandatory arguments to long options are mandatory for short options too. The man pages are your friend. Instead of trying to remember everything, instead remember you can easily look stuff up in the man pages.
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What are man pages?
A man page short for manual page is a form of software documentation usually found on a Unix or Unix-like operating system. Topics covered include computer programs including library and system calls , formal standards and conventions, and even abstract concepts. A user may invoke a man page by issuing the man command.
The Linux command line offers a wealth of power and opportunity. If your memory is like mine then you find it hard to remember a large number of details. Fortunately for us there is an easy to use resource that can inform us about all the great things we can do on the command line. That's what we're going to learn about in this section.
Master the command line: How to use man pages
Is it some kind of arcane knowledge, handed down only to initiates after grueling initiations? Well, no. Actually, anyone can learn about Terminal commands, if they know where to look. The key to Terminal wisdom is the man command. In fact, man itself is a command, whose role is to format and display this documentation. Then, if you type man pwd , for example, Terminal will display the man page for the pwd command. All man pages have a common format.
Linux Tutorial - 4. Manual Pages
Several "front-end" interfaces exist, such as aptitude 8 , synaptic 8 and wajig 1. Unless the -h , or --help option is given, one of the commands below must be present. For example, when using a Debian archive, this command retrieves and scans the Packages. An update should always be performed before an upgrade or dist-upgrade.
get(1) - Linux man page
Jump to navigation. It's easy to get into the habit of googling anything you want to know about a command or operation in Linux, but I'd argue there's something even better: a living and breathing, complete reference, the man pages , which is short for manual pages. The history of man pages predates Linux, all the way back to the early days of Unix.
Click here to browse the author's latest version of this document. Corrections and suggestions welcome! This HOWTO explains what you should bear in mind when you are going to write on-line documentation -- a so-called man page -- that you want to make accessible via the man 1 command. Throughout this HOWTO, a manual entry is simply referred to as a man page, regardless of actual length and without sexist intention. Why do we write documentation?
How to use a man page: Faster than a Google search
While they're not all well-advertised, there are actually a variety of means of getting help under Unix. Man pages correspond to online manuals for programs, file formats, functions, system calls, and so forth. If you've never read one before, the best way to start is by typing 'man man ' at the command line. Of course, while man pages are a vast improvement over the online documentation of most other OSes, they suffer from many failings: some people don't like to read text on the screen not very helpful unless you already know what to look for not always accessible even when present not always present, especially under Linux frequently hard to read, as they try to be authoritative and are therefore often too technical for new users frequently out of date That said, they're still better and more comprehensive than the alternatives. We'll try to address the first three failings in this document. Man pages are the standard documentation for every Unix; you're sure to come across a reference before too long of the form:. Where N is a number from , possibly followed by a letter.
Search a folder hierarchy for filename s that meet a desired criteria: Name, Size, File Type - see examples. GNU find searches the directory tree rooted at each given file name by evaluating the given expression from left to right, according to the rules of precedence see Operators , until the outcome is known the left hand side is false for AND operations, true for OR , at which point find moves on to the next file name. The -H, -L and -P options control the treatment of symbolic links. That argument and any following arguments are taken to be the expression describing what is to be searched for.
find(1) - Linux man page