26. The shell environment variables are used to customize the environment in which shell runs.
a) True
b) False
a) True
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a) True.
To confirm this answer, you can refer to the documentation or resources related to shell programming or Unix-like operating systems, such as POSIX standards or the documentation for specific shell types like Bash or Zsh.
Shell environment variables are indeed used to personalize and modify the environment in which the shell operates. These variables define various aspects of the shell's behavior, such as the default editor, search path for executables, default command-line prompt, and many other settings. They allow users to customize their shell experience according to their preferences and requirements.