Take Two: Eshell

Summary

This is a contribution to the Emacs Carnival 2025-06: Take Two collection of posts on Christian Tietze’s blog. My first take with Eshell many years back did not leave a good impression. My early expectations was that it should act like any other shell, only to be unpleasantly surprised by it. It took a long time for me to warm up to Eshell. Upon reflection, it was because I wasn’t ready for it. Now Eshell is an inseparable part of my Emacs experience. Paradoxically though, I find little occasion to use Eshell in the same way I’ve used shells in the past. Much of what I used to use the shell for, I do today with Emacs modes instead. It was not always this way. Like so many users who started Unix computing in the 80’s, I started with the command line (for myself ksh and later bash), studiously internalizing command line tools and their arcane syntaxes to support file management, running programs, and systems administration. Overwhelmingly though, it was file management and running programs that I did through the command line. For file management these days, Dired is my interface of choice. It is simply the more elegant tool for the job. Case in point: renaming a bunch of files in a directory to arbitrary names. With a shell, my standard approach would have been to run some variant of ls -1 > foo.sh, edit foo.sh to insert mv on each line to a renamed target file, chmod u+x foo.sh to be executable, run foo.sh, delete foo.sh and call it a day. With Dired, the above steps are replaced as such: make the buffer writable (via Wdired). Change the target filenames to a desired result, then commit the changes. This is even easier if there is a pattern you can use a regexp for. Unsurprisingly, all the basic file management operations that you would want are supported by Dired. Add Casual Dired to help make these operations discoverable and you’ll soon consider how quaint using mv, cp, rm, and ls are. Running a simple command on a file? Again, you can do that with Dired. Move the...