Here’s the Deal

sh vs eltclsh

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When comparing sh vs eltclsh, the Slant community recommends sh for most people. In the question“What are the best Bash replacements?” sh is ranked 8th while eltclsh is ranked 11th. The most important reason people chose sh is:

It may not be the best if you want power, but if you want to write a POSIX script that will run everywhere, it's a pretty good choice.

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Common Questions

What are the best Bash replacements?

Pros

Pro
Truely the most broadly available shell

It may not be the best if you want power, but if you want to write a POSIX script that will run everywhere, it's a pretty good choice.

Pro
Most influential Unix shell alongside csh

Bourne shell introduced features such as piping, here documents, command substitution, variables, control structures for condition-testing and looping and filename wildcarding.

Pro
A more consistent alternative to the POSIX shell

Tcl is a saner scripting language built on the same principle as the Unix shell (everything is a string) with more than a hint of Lisp. eltclsh makes it possible to use Tcl interactively with tab completion for both language constructs and file paths. The result is that you can develop a snippet of Tcl code interactively and then paste it in your script.

Pro
TclVFS

TclVFS allows you access files inside ZIP archives or on remote HTTP and FTP servers like you would local files. If you put "package require vfs::urltype; vfs::urltype::Mount http"
in your ~/.eltclshrc you can do things like "file copy http://example.com/file /tmp/file" (HTTPS is currently not supported by TclVFS.)