set command

I am a new shell user. How do I print or list environment variables on Linux and Unix-like operating system using shell prompt? In Linix and Unix, how can I print values of all my environment variables?

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How do I display all my environment variables using bash shell on RHEL / Debian / Ubuntu / CentOS / Fedora / Mint Linux operating systems?

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I‘ve recently started to use FreeBSD operating system with tcsh (c shell clone) shell. I noticed that both set and setenv command set shell user environment. What’s the difference between the SET and SETENV commands?

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Bash shell is used for various purposes under Linux. How do I customize the shell environment variable under Linux operating systems?

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Q. How do I display shell environment settings under FreeBSD operating systems?

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How do I add a new path to $PATH variable under Linux and UNIX like operating system? What is my path, and how do I set or modify it using csh/tcsh or bash/ksh/sh shell?

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