trap

This blog details the use of the `BASH_COMMAND` in a `trap` command for logging exact Bash script executions, enhancing debugging and script robustness. It explains `trap` functionality, incorporates `BASH_COMMAND` for monitoring script behaviors during triggers, and provides practical examples, including logging executed commands upon script exit or during interruptions, boosting script reliability and maintenance.

The article explains handling `SIGINT` in Linux Bash scripts, focusing on maintaining uninterrupted operations during critical sections. It introduces the `trap` command for custom signal management, particularly `trap '' INT` to ignore `SIGINT` temporarily, ensuring the stability and integrity of crucial operations. Practical examples and scenarios demonstrate effective signal handling in scripts.

Learn to handle `SIGCHLD` signals in Bash for asynchronous monitoring of background processes. Utilize the `trap` command to set up real-time alerts on process completion, enabling efficient cleanup and updates within your scripts. This technique improves responsiveness and is ideal for managing multiple concurrent tasks.

This blog article examines using `SIGCHLD` for asynchronous child process monitoring in bash. It explains how `SIGCHLD` helps manage child processes by notifying the parent process about their status changes. Utilizing the `trap` command, the blog demonstrates setting handlers for `SIGCHLD`, enabling efficient clean-up and processing after a child process ends, thus enhancing script robustness in handling multiple child processes.

This article delves into Linux signal handling using `trap` and `kill -TERM $!` in Bash scripts, explaining methods to manage inter-process communication such as `SIGINT` and `SIGTERM`. It covers setting traps in parent scripts to catch signals and forward them via `kill` to a child process, ensuring that scripts can handle unexpected terminations gracefully.

The article explains the use of temporary FIFOs (First In, First Out named pipes) in Linux scripting for process communication. It covers creating FIFOs with `mkfifo` and cleaning up with `trap` upon script exit to maintain system cleanliness. Tips on FIFO usage, example commands, and instructions for necessary tool installation on various Linux distributions are included to help master effective FIFO management.