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Xiaobian to share with you how to achieve linux when Bash with undeclared variables to make the script exit, I hope you have something to gain after reading this article, let's discuss it together!

Exiting scripts when Bash uses undeclared variables

Bash may also use undeclared variables that can cause logical errors. So let bash know when it tries to use an undeclared variable to exit script execution with the following line:

Linux is a free-to-use and freely distributed UNIX-like operating system, a POSIX-based multiuser, multitasking, multithreaded, and multiCPU operating system that runs major Unix utilities, applications, and network protocols.

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