Author: Arpit Mandliya

In this entire article, we will use the following content of three different text files to practice the provided solutions. [crayon-67266eaa8ebe4860452074/] [crayon-67266eaa8ebef237688464/] [crayon-67266eaa8ebf1572384686/] Using cmp Command Use the cmp command to check if two files are the same in Bash. [crayon-67266eaa8ebf2645905099/] [crayon-67266eaa8ebf3617624594/] In the above example, we initialized the file1 and file2 variables with the […]

1. Overview In this article, we will see how to get last line of output in Bash using tail, awk, sed, mapfile, and head commands with various options. 2. Introduction to Problem Statement We will use ls -l to list directories and files in long format and get the last line of output using various […]

Using ping Command Use the ping command in bash to check if the host is reachable or not. [crayon-67266eaa8fe6f673933291/] [crayon-67266eaa8fe73537775754/] In this bash script, the ping command is used to check if the host "example.com" is reachable or not. In bash, the ping command is used to send ICMP Echo Request packets to the given […]

Using Substitution Syntax Use substitution syntax to capture the output of a single command into a variable in Bash. [crayon-67266eaa9001f525252498/] [crayon-67266eaa90023107610392/] We used the date command to get the current date and time. The date command was enclosed within the substitution syntax represented by the $(...), which we used to capture the output of the […]

Using printf Statement Use the printf statement to convert the array to a comma-separated string in Bash. [crayon-67266eaa90237304167549/] [crayon-67266eaa9023a923637477/] We initialized an array containing string elements. Then, we used the printf statement to convert the specified array to a comma-separated string. How? The printf statement formatted and stored the elements of the array into the […]

Bash cannot return values, whether a single value or an array, but it can return a status (the same as other programs). However, there are multiple turnarounds that we can use to return an array from a function. Let’s explore them below. Using nameref Feature To return the entire array from a function in Bash: […]

Using + Operator Use + operator to merge arrays in PowerShell. [crayon-67266eaa90b6a805277125/] [crayon-67266eaa90b6f681565999/] We used the sub-expression operator represented by @() to create two separate arrays named $array1 and $array2 (you can also create arrays without using the sub-expression operator). Note that both arrays contained string-type values. Next, we used the + operator to join […]

Using date Command Use the date command to format the date to yyyymmdd in Bash. [crayon-67266eaa90ec7512672667/] [crayon-67266eaa90eca174228815/] In the above example, the bash date command is used to get the current date with the format specifier '%Y%m%d' to specify the date format. In Bash, the date command is used to retrieve the date and time […]

Using awk Command Use the awk command to get the last word of each line from a file in Bash. [crayon-67266eaa91add618327184/] [crayon-67266eaa91ae2147584486/] [crayon-67266eaa91ae3497695038/] We use the awk command, a powerful text-processing tool allowing you to process and manipulate structured data. The awk command operated each line individually and performed action based on the predefined patterns […]