Directory tree listing, script does not work in csh?

Question

ls -R | grep ":$" | sed -e 's/:$//' -e 's/[^-][^\/]*\//--/g' -e 's/^/ /' -e 's/-/|/'

I found a command to display directory tree (see above), it didn't work correctly. It gave error message "Illegal variable name". I think the error is at $ sign. How can I modify this command for cshell environment?

• Ignacio Vazquez-Abrams: Other than escaping it?
• JdeBP: I suspect that I am not the only one enjoying that the answer is given only a few characters further along in the question itself.
• ctrl-alt-delor: What is "directory command"?

Answer 1

:$ should be in single quotes to stop the shell from expanding it.

so ls -R | grep ':$' | sed -e 's/:$//' -e 's/[^-][^\/]*\//--/g' -e 's/^/ /' -e 's/-/|/'

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Your next thing to learn, is shell quoting, and expansions.

Also a lot of people consider csh to have been a mistake. It is full of odd inconsistent behaviour. Consider another bash, ksh, fish ...

Answer 2

Instead of a shell script you can use an external commands. 'tree' may be available in your environment, then it's easy.

tree -d