Linux Bash provides a lot of useful features and commands. Pipe or | is one of them. Bash provides command line interface facility which mainly used to concatenate command output to another command. Concept In Linux everything is file. This may seem odd but it is. Every command executed will have three type of streams which can be used to provide or output data into and from a command. STDIN (0)...
Dash (-) have important role in Linux and other operating systems. It is used by commands to specify options and arguments. This popular use case may create problems if we have files those provides dash. Linux commands generally need explicit operations to cope with file names those starts with dash. Create File Name Starts with Dash We will start by creating a file which name starts with a dash – ....
Bash shell provides environment and shell variables in order to hold data. These variables helps system administrators during the operations by giving clues and helpers. echo command is used to put these variables to the standard output but in some cases some characters may misinterpreted and not work. In this tutorial we will look how to print bash variables accordingly with echocommand. Echo Problem The problem is that when we...
Bash provides a lot of useful programming functionalities. for loop is one of the most useful of them. We can use for loop for iterative jobs. Linux system administrators generally use for loop to iterate over files and folder. In this tutorial, we will look at how to use for loop to iterate over files and directories in Linux. This example can be used any of Linux distribution which uses...
Networks transmits signals through two type of medium. One medium is cables and other medium is air. Cables have most popular usage. We will look different type of cables. And how these cables are used, their performances and characteristics. Coaxial Cables Coaxial cable or simply coax is a type of cable using a core conductor which is surrounded with a insulating layer. This insulating layer is also surrounded with a...
Linux have a lot of tools to display file content. cat , less , tail etc. are some of them. They have different features and usage areas. Tail is mainly developed and used to display end of file. We will look different features and usage examples of tail command Syntax We will use following syntax for tail command.
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tail [OPTION]... [FILE]... |
Help
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$ tail --help |
Tail We will start simply tailing a file. We will use one...
Concatenate or simply cat is very useful command in Linux and Unix systems. Cat have the ability to create files, concatenate files or redirect output. In this tutorial we will look different useful examples for daily usage for system administrators. Syntax Syntax of Linux cat command is standard like most of the Linux tools.
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cat [OPTION]... [FILE]... |
Man and Help Man page can be get like below. As we can see cat command provides a...
