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Linux Ideas and Concepts

7. Linux Paths Facts

For facts to work effectively at the command line, you should be familiar with the following terms The path is the location of an object in the file system. A pass variable stores the list of directories that are searched to execute a command. It means the path variable will contain the directories that have the binary executable files. The working directory is the directory a user is currently in, and we can display the current working directory using the command PWD. We have two different types of paths, both of which you will need to work with: the absolutepath the full path name of the specified file or directory, starting from the root directory, for examplehomemiecine A relative path, for example, is a path to a target directory or file that is relative to your current location in the directory tree. Now let's see how to use absolute and relative paths in the command-line interface. Now in our command line interface, if we type DWD, we will see that the current working directory is the home directory of the Micine user, which is inhomemeacine. So for example, if we type lspomemeacine, as long as this path is started with rootdirectory, it means this path is an absolute path. Now LS will display the content of homeopathy. So to see the content of the text directory, we have two options. We can use the absolute path with LSP methylation tests or the relative path with LSP space tests. Because the test directory is located in the current working directory, which is homemacn, it's easy to use the relative pass instead of the absolute pass. To clear the screen, type clear and then press Enter. To know the value of the path variable, we will echo space dollar sign" in capital letters. Here it will display the value of the pass variable. The pass variable will contain a list of directories that have the binary executable files. It means when we use any command, such as ls, the system will search for this command in these directories, then execute the command.

Running Commands and Getting Help

1. Getting Help Using 'man' Command

In Linux, don't memorise everything because there are many tools that can be used for getting help. Most Unix and Linux files and commands have pretty good man pages to explain their usage. Main pages also come in handy when you are using multiple flavours of Unix or several Linux distributions. Since options and parameters are sometimes different, type the command for which you want help and press Enter. For example main les it will openthe manual page of les command. Here, it will give a short description of the les command and the available options that can be used with the les command.To go down, just press the down arrow, or to go up, just press the up arrow. Or we can use Page Up and Page Down on the keyboard. To search for a specific string, just press the Forward Slash key, then type the string you want to search for. For example silence. Here we will see that the search string will appear in the pattern of the manual page. Then press Enter. By default, the search will be done in the direction of upward to down.So to continue to search in the same direction, which is from up to down, press N, small. To search in the opposite direction from down to up, press N Capital.To exit the manual page, press Q. We can open the manual page for specific configuration files, which have their own manual page, such as Men RSS log conf. It will open the Rslogconfiguration file's manual page, where we can read and search for any specific information. To exit the manual page, we will press Q. to list the manual pages that have the strength syslog. To clear the screen, we will use Clear, then press Enter. The manual pages are located in USR share documents. If we use the LS command, it will display the contents of this directory. So the LS command is similar to diarrhoea in Windows, and we can use Diarr instead of LS to list the contents of the USR shared doc directory. Because all of this content is manual pages for Linux commands, we can conclude that this pass is USR Share doc. So if we need to get any information, we can read the documentation for the comments in this directory.

2. Getting Help Using 'info' Command

The info command is similar to mancommand, but enfue is more in depth. But if we run enfo without any arguments, we list all the information pages. Enfou Pages are structured like a website. Each page is divided into nodes, and links to nodes are preceded by asterisks like this one and this one, CPIO and Tar. So all nodes are preceded by asterisks. We can use Page Up and Page Down to navigate to the infopage, and we can use the Tab key to move to the next link. Now we are at CPI link. If we press tab again, we will go to a third link. To enter the selected link, for example, the Tar link, we will press Enter. Now we are on the third info page. To go up one level node, we will press U here, and we will come back again to the main page. To go to the tour page again, we will go to Tarand and press Enter here for the Tarnfo page so we can navigate using Page Up and Page Down, and to go to the next mood or the next link, we will press Tab here. If we press Enter, we will log into this page, which is the introduction page. To go to the previous page, we will press P. This is the main page of the Tar Info Page. If we need to go to the next page, we will press in. This is the introduction page. If we need to go to the next page, we will press N. This is the tutorial introduction for Tarcoma. If we would like to search for a specific string, we will press S. Here we will see the registration from Bit, and we can type any string, for example "Tests," then press Enter. It will show the results, and to quit from the Info page we will press Q. We can type for example Enfue fullby specific command, for example Tor. It will open the Tor info page, and we can navigate as usual using Page Up and Page Down, or we can go, for example, to the next link using the F key, and to enter this link we will press Enter, and so on. To exit from the info page, press

3. Getting Help Using 'whatis - which - which' Commands

To see just the description of a manual page, use what is followed by a string, such as what is followed by LS. For example, it will give us a short description of the manual page LS. The location of the manual page can be displayed using the Where is comment, so where is followed by the manual page name? For example, if you type "list" it will display the location of the manual page comment. If you want to know more about the men command, just type "man" and it will show us the manual page of the men command. To exit the manual page, just press Q. To know the location of specific commands, just use which followed by the command name, such as CD. It will show us the location of the binary file for the CD command in the USR bin directory.

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