Linux: Using the maybe Command for Randomized Testing Scenarios
The maybe command is a custom alias in Linux that randomly returns either true or false. This randomness can be an excellent tool for……
$ grep -rn "#Linux" ./posts
How to Tail a File and Add Timestamps in Real Time on Linux and macOS
When monitoring or debugging log files, it’s often helpful to tail a file and add timestamps to each new line as it appears. This guide……
Linux: Add File Icons to Your ls Command with colorls
The command line is a developer’s trusty companion, but the default ls command can feel a bit drab with its plain output. Enter colorls, a……
Migrate A Running Linux Process on Another Machine Using CRIU
Introduction…
How to Generate a QR Code for Wi-Fi Connection from the Command Line
QR codes offer a quick and easy way to share Wi-Fi credentials. By generating a QR code, users can scan it with their smartphone or tablet……
How to create a directory that will automatically zip files
When managing large file systems, automating routine tasks like file compression can help improve storage efficiency and reduce manual……
How to replace the nth occurrence of a word using sed
Assume the following scenario, you have a text file and you want to replace each nth occurrence of a word on each line, using sed is a……
How to force a Linux server to shutdown if there is no active SSH connection for the last hour
Ahh the cloud! What a wonderful time to work as a sysadmin/devops. you have the power to create an unlimited number of virtual machines……
Linux: How to append text to a file only if text does not exist
Assume the following scenario! you have multiple log lines coming from various sources but there is always the chance that there could be……
Linux: track a file and send an email when a particular text shows up
Assume that you have to solve the following problem, you have to constantly watch a log file for a specific event and then send an email……