Find what man page is appropriate
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. By default, man typically uses a terminal pager program such as more or less to display its output. Because man pages are distributed together with the software they document, they are a more favourable means of documenting software compared to out-of-band documentation like web pages , as there is a higher likelihood for a match between the actual features of the software to the documented ones. In the first two years of the history of Unix , no documentation existed.SEE VIDEO BY TOPIC: WT2015: How to write Linux/Unix man pages (quick and dirty method)
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How to use a man page: Faster than a Google search
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. They begin with name the name of the command and a brief description of what it does. The pwd command I looked at above shows the following:.
Next comes synopsis , which shows the command any any options, or flags, that you can use with it. For pwd , there are two options: -L and -P. These options are explained in the description section:. When you look at a man page, you do so in Terminal through another command, called a pager ; by default, this is the less command.
What a pager does is allow you to view content in Terminal page by page, or line by line. There are two ways to do this with less. If you press Return, the page will move down one line. And if you press the spacebar, the page will scroll one page the number of lines visible in your Terminal window.
Try it on your Mac: Open Terminal, type man ls , then press Return. Depending on your Terminal settings, you may be able to scroll the Terminal window. If not, press Control-B to go back a page, and the spacebar, or Control-F, to go forward a page. Press Command-O, enter the name of a command, and click Open. ManOpen is especially useful because you can choose specific sections to view from a popup menu, and you can navigate more easily than in Terminal with the less command.
But you can also find man pages on the Web. Apple has a documentation repository with man pages here. You can click Alphabetic Index to get a list of all commands, then search for the one you want. No matter which route you choose, man pages open the door to a goldmine of information about the command line. Man up The key to Terminal wisdom is the man command.
The beginning of the man page for the pwd command. The pwd command I looked at above shows the following: pwd—return working directory name Next comes synopsis , which shows the command any any options, or flags, that you can use with it.
Some shells may provide a builtin pwd command which is similar or identical to this utility. Consult the builtin 1 manual page. The options are as follows: -L Display the logical current working directory. If no options are specified, the -L option is assumed. Paging man pages When you look at a man page, you do so in Terminal through another command, called a pager ; by default, this is the less command.
ManOpen lets you view man pages in a friendlier interface than Terminal. Note: When you purchase something after clicking links in our articles, we may earn a small commission. Read our affiliate link policy for more details.
Linux man Command Tutorial for Beginners (8 Examples)
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. Man pages also have a reputation of being terse and, in a way, have a language of their own. Just like Unix and Linux, the man pages have not been static, and they continue to be developed and maintained just like the kernel.
The project thus provides most of the pages in Section 2, many of the pages that appear in Sections 3, 4, and 7, and a few of the pages that appear in Sections 1, 5, and 8 of the man pages on a Linux system. The conventions described on this page may also be useful for authors writing man pages for other projects. Sections of the manual pages The manual Sections are traditionally defined as follows: 1 User commands Programs Those commands that can be executed by the user from within a shell. Macro package New manual pages should be marked up using the groff an.
Linux man command
Command line users are undoubtedly familiar with man pages, or manual pages, that contain details, help , and documentation to specified commands and functions. Referencing a man page can be essential when trying to learn proper syntax or how a command works, but with how large some manual pages are it can be a real drag to scroll through the entire man page to try and find a relevant portion. Note the flag is a capital -K, the string can be anything. Any matches to the syntax in the current man page will be highlighted. And for those who use Terminal app, remember you can also search and launch manual pages from the Terminal Help menu directly, which would then allow you to use the aforementioned string search to look within a help doc to get further details. Enjoy this tip? Subscribe to the OSXDaily newsletter to get more of our great Apple tips, tricks, and important news delivered to your inbox! Enter your email address below:. But ManOpen handles almost everything else beautifully. But yes I agree, the black title bar looks great.
man command in Linux with Examples
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.
Section-num : Since a manual is divided into multiple sections so this option is used to display only a specific section of a manual. So this option gives the section in which the given command is present. In this example you can move through the manual pages sections i. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.
find(1) - Linux man page
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.
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. If no paths are given, the current directory is used. If no expression is given, the expression '-print' is used but you should probably consider using '-print0' instead, anyway.
How to Search Man Pages at the Command Line
A very useful aspect of the Linux command line is that the documentation for almost all command line tools is easily accessible. These documents are known as man pages, and you can easily access them through the command line using the man command. In this tutorial, we will discuss the basics of man using some easy to understand examples. But before we do that, it's worth mentioning that all examples in this article have been tested on Ubuntu The man command gives users access to manual pages for command line utilities and tools.
Master the command line: How to use man pages