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In csh, using quotes in a quoted string can be tricky, especially if the string contains both single and double quotes. If you use single quotes to quote the string, use ‘\’’ (a single quote, a backslash followed by two single quotes) where you want to insert ...

A environment variable defined in a shell (or a shell script) stays defined everywhere, including inside new shells (or shell scripts) executed within the shell, until the shell (or the shell script) terminates or the variable gets unset explicitly. E.g.script...