Bash – Page 2 – POFTUT

Category: Bash


How To Bash Concatenate or Add Strings?

Bash provides string operations. We can use different operations like remove, find or concatenate strings in bash. In this tutorial we will look how to add or concatenate strings in Linux bash. Put Variables Side By Side The simplest and easy to understand way to concatenate string is writing the variables side by side. We will write the variables like $a$b . We do not need extra operater or function...


Linux Bash Comments Inline or Outline

Linux bash have a lot of different type of programming features. While using these features we can create very complex scripts or applications in bash. In order to take notes in a script we should use comments. Comments provides useful information for system administrators. Comment Bash In bash comments starts with # . In the following example comments can be easily seen that those comments start from beginning of the...


How To Check If File Exists In Linux Bash?

Linux bash have different file and directory related functions to create, delete, change and check existence. In this tutorial we will look how to check a file or directory if it exists. Check File Existence We will use bash test mechanism. Bash test mechanism have two formats where we can use followings. test -f FILENAME [ -f FILENAME] Square brackets format is preferred in conditional usage like ifand switch ....

How To Set Path In Bash Shell Linux? 0

How To Set Path In Bash Shell Linux?

Linux bash shell provides a lot of information into running applications. PATH is one of the most important one which is used to locate binary files and libraries. In some situations we may need to edit, add or remote some paths and locations from bash PATH variable. In this tutorial we will different use cases about these operations. Print Current PATH Variable We will start printing current PATH variable. This...


How To Pass and Parse Linux Bash Script Arguments and Parameters

Bash is powerful scripting language provides by various Linux distributions,Unix and BSD. If we need to make our script dynamic we generally use arguments. Arguments are provided to the script through command line. In this tutorial we will examine different use cases of argument passing and examples. Syntax In order to use externally provided values inside bash script we should provide them after the script name. Following syntax assumes the...


How To Linux Bash For Loop In Files?

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...


Linux Bash For Loop Range Examples

Bash for loop is popular programming structure used by a lot of Linux system administrators. For loops can be used in a lot of different cases. We have all ready examined the bash while and for loop in the following tutorial. Bash For and While Loop Examples In this tutorial we will look more specific topic named for loop with range Specify Range with Numbers Linux bash provides mechanism to...


Linux Bash Tutorial Index

Introduction To Linux Bash Programming Linux Bash Directories and Files Linux Bash Environment Variables Linux Bash Variables Linux Bash Functions Linux Bash If Else Conditionals Linux Bash Create and Run Script Files Linux Bash Operators Linux Bash Arrays Linux Bash Input, Output and Redirection Linux Bash History Linux Bash Alias Linux Bash .bashrc File Linux Bash Debugging


Bash Printf Function Tutorial with Examples

Bash provides programming features to make Linux system administrator’s life easier. printf is one of the most used function used by Linux bash programmers. In this tutorial we will look Linux bash printf features and use cases while developing bash programs. Bash printf function is very similar to the C printf function. Just Print We can use printf function easily by providing the text in double quotes. In this example we will print Hello...


Linux Bash Environment Variables

Environment is shell running session and session related info. environment is important part of the Linux bash. We can set variables at the current environment and use them. Bash also provides some default environment variables too. Create Variables While Login You may need to create variable at login time of the user. For example to use login date at shell scripts it is very convenient or looking data from other...

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