bash: How to Decode base64
Base64 encoding is a widely used technique for transforming binary data into a text-based format, and decoding Base64 strings is a common task in scripting and programming. In this guide,…
bash: How to increment variable
In Bash, variable incrementation refers to the process of increasing the value of a variable by a certain amount. This operation is crucial for tasks like counting iterations in loops,…
bash shebang #!/
The “shebang” is a special line in a script that specifies the interpreter for running the script. It is also known as a hashbang or a pound-bang. In Bash scripts,…
How to generate public/private keys
This post shows how to generate public / private key pair. To generate public/private key pair, simply run the following command:$ ssh-keygen -t rsa Following are step-by-step instructions: 1. Open…
Linux: How to delete files recursively
The rm command deletes files. To delete a directory that is not empty and its subdirectories, use$ rm -rf directory However, sometimes you need to remove a specific subdirectory rather…
Creating empty files from Linux command line
There are many ways to create an empty text file from command line. This post shows 3 ways. To create empty file from Linux command line, you can use one…
bash: Renaming multiple files
To rename multiple files using the command line, you can use the rename command or a shell script. Its syntax is as follows. As you can see, the catch is…
bash: How to change file extensions
This post shows how to change file extensions using bash. To change file extensions, we simple need to loop through file in a directory and use the “mv” command to…
bash shell scripting
A shell script is a code (script) written for the shell or command line interpreter of an operating system such as Unix. It allows users to automate tasks which would…
Reading files in a directory using bash
The following code reads files in a directory called SQL. Then if runs an SQL command with the file name as input. Finally, it deletes the file from the directory.