environment variables

What is the maximum character length of arguments in a shell command? How do I find out the maximum length of arguments for a new process under Linux or Unix like operating systems?

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How do I set default printer in my Bash shell under CentOS Linux or FreeBSD unix desktop operating systems?

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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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I noticed that many shell scripts in /etc/init.d/ directory use the following syntax:

echo $“Usage $prog start|stop|reload|restart”

Why a double-quoted string preceded by a dollar sign ($”string”) using the echo command under Linux / UNIX bash scripts?

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How do I set environment variables using c shell (tcsh or csh) under FreeBSD UNIX or Linux operating systems? How do I save variable using csh shell under Unix like operating systems?

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