Bash

Using sed with a command: Use sed with the a command to add a line to the file’s end in Bash. [crayon-6904b0016ee11493110645/] [crayon-6904b0016ee19324503140/] In this example, the sed command is used with the a option to add a line This is the last Line to the end of the file myFile.txt. In Bash, sed is […]

Bash Sort CSV by Column Using sort Command Use bash’s sort command to sort the CSV file by column. [crayon-6904b0016f141016683957/] [crayon-6904b0016f145358430638/] [crayon-6904b0016f146166582353/] In this example, the sort command is used to sort the myFile.csv file by column. Here, the -t parameter is used to specify the field separator, which is , in the above case. […]

Using echo Command Use the echo command with redirection operator (>) to write variable to file in Bash. [crayon-6904b0016f359085346802/] [crayon-6904b0016f35c826491345/] Use the echo command with the append operator (>>) to append a variable to the end of the specified file in Bash. [crayon-6904b0016f35d223459376/] [crayon-6904b0016f35e434527423/] Use the echo command with the append operator (>>) to append […]

Using Shorthand Operator Use the Shorthand operator to append one element to an array in Bash. [crayon-6904b0016f602106473114/] [crayon-6904b0016f606616141460/] First, we declared an array (my_array) with three initial elements element1, element2, and element3. Then, we used the shorthand operator (+=) to append the new_element to the end of an array. Finally, we used the echo command […]

Using cUrl command with -w, -s and -o options For Get Method Use the -w or --write-out option in combination with the %{http_code} format specifier to get curl response code in Bash for get method. [crayon-6904b0016f80d017566813/] [crayon-6904b0016f810130012453/] We can also rewrite it into more verbose format in case you need for better understanding. [crayon-6904b0016f811371436032/] In […]

Using sed Command Read the provided text file and remove lines containing string using sed command. We will not modify the input file (file.txt) but display the output on the Bash console. We can use -i option in case we want to modify input file [crayon-6904b0016f954697233903/] [crayon-6904b0016f956706702511/] [crayon-6904b0016f957471470837/] Let’s break down command to understand it […]

Using awk command with sub() method Use the awk command with sub() method to remove the first column from the given CSV file (inputFile.csv) in Bash. We will not update the input file but display the output on the Bash console. [crayon-6904b0016fb91626444148/] [crayon-6904b0016fb97338244712/] [crayon-6904b0016fb99377092636/] Here we used $1="" to replace first column with empty string […]

1. Overview In Unix-like environments, especially in scripting and programming with Bash, there might be scenarios where we need to remove the last line from a file. This operation is typical in data processing, log file management, and scripting. 2. Introduction to Problem Statement Imagine we have a text file named test.txt containing the following […]

Using sed Command Use the sed command to remove spaces from string without updating the original variable in Bash. [crayon-6904b00170159037051383/] [crayon-6904b0017015d297355881/] First, we stored the string value in the var variable. Then, we piped it to the sed command, a stream editor performing operations on the text streams. In the above case, we used it […]