At the time of writing of Bash scripts, sometimes you need to read a file line by line. In this tutorial, we will show you how to read file line by line in Bash. Syntax for Read File Line by Line# The following is the common syntax for reading a file line-by-line: while IFS= read
Bash Heredoc
A Heredoc (Here document) is a redirection type which allows to pass multiline lines of input to a command. Sometimes while writing shell scripts you need to pass multiline block of code or text with the command like cat, sftp or tee. In this guide, you will learn how to use the Heredoc in bash.
Bash Concatenate Strings
In any programming language the concatenation is the commonly used string operations. String concatenate is used to joining the two or more strings together by appending one to end of another string. In this tutorial, you will learn how to concatenate strings in Bash. Concatenating Strings# It’s very easy to concatenate multiple string variables by
Bash until Loop
Loops are primary requirement of any programming languages. Loops are useful when you want to execute a series of commands until the certain condition is satisfied. In Bash, loops are useful for automating repetitive tasks. There are three basic loops for loop, while loop , and until loop. In this tutorial, we will see basics
Bash Functions
A Bash function is a predefined set of commands and can be use n number of times. It is useful to avoid repeatedly writing same code. In this tutorial, we will show you the basics of Bash functions. Create Bash Functions# It is very easy and straightforward to create a bash function. You can declare
How to Create Bash Aliases
Bash aliases are shortcuts for the long commands. It allows you to set a memorable shortcut command for a longer command. This guide explains how to create bash aliases on Linux system. Creating Bash Aliases# It is very easy to create bash aliases. Following is the general syntax: alias alias_name=”command_to_run” You should put the alias
Bash while Loop
Loops are primary requirement of any programming languages. Loops are useful when you want to execute a series of commands until the certain condition is satisfied. In Bash, loops are useful for automating repetitive tasks. In this tutorial, we will see basics of while loop in Bash. There are three basic loops for loop, while
Bash break and continue
Using loops you can run multiple commands until the condition is satisfied. But sometimes you need to divert the flow of loop or terminate the loop iteration. In such cases, you can use break and continue statements in bash to handle the loop execution. In this guide we will how to use break and continue
Bash Sequence Expression (Range)
Using Bash sequence expression you can generates a range of integers or characters by providing the start and the end point of the range. In this guide, we will show you the basics of the sequence expression in Bash. Bash Sequence Expression# Below is the basic form of the sequence expression: {START..END[..INCREMENT]} The expression starts
How to Compare Strings in Bash
At the time of writing bash scripts, it’s often required to compare two strings to check it wether those are equal or not. Two strings are equal when they have the same length and contain the same sequence of characters. This guide shows you how to compare strings in Bash. Comparison Operators# Comparison operators are