Approach for logging data in a shell script

Feedback Question: I am currently working on the development of multiple shell scripts and I am looking to incorporate a simple logging method. However, the function that has been created is only able to print the first log line. This issue is causing me significant frustration and confusion as I am unable to identify the […]

Echoing a Sequence of Numbers Line by Line

To solve this, you can use bash by reading the first 10,000 lines and dividing them into groups of four consecutive lines. The new files can be given a prefix of “n” and a suffix of “n”. To repeat this process 10,000 times, you can create a loop. For the first iteration, print lines 1 […]

Replacing Text in Multiple Text Files with Shell Linux

To replace text in all files on Linux, you can use a command or a tool written in Perl. The Perl tool, available at, offers several features, including the ability to perform multiple search-replace or query-search-replace operations, process multiple files, and apply user-defined Perl expressions to each line of input files. The tool can […]

Restrictions preventing /usr/bin/cd from accessing $OLDPWD

It is worth noting that command names are usually written in lowercase letters, whereas shell environment variables are typically written in uppercase letters. If you want to view the values of the variables mentioned, you can use a command similar to the following. To output array variables, you can use the syntax “${ARR_NAME[$index]}. Question: Encountered […]

Verify whether a string is equal in Bash

When programming, it may be necessary to compare a string value inputted by the user with a specific string value. As per @chepner’s suggestion, to check for equality, a single equal sign can be used with either single or double square brackets. To compare the value of two strings for different programming purposes, built-in functions […]

Round a Split Number using Bash

If you are working with floating-point variables in Zsh, you may encounter an issue where the variable displays more precision than necessary when expanded. To avoid this, you can utilize arithmetic expansion instead of regular expansion. Another option is to use the “printf” command to display the value with limited precision. This method can also […]