What exactly is the Login shell? I looked at the link, but the compuspeak is beyond me and I dont understand exactly what this is.
“If you are neutral in situations of injustice, you have chosen the side of the oppressor. If an elephant has its foot on the tail of a mouse and you say that you are neutral, the mouse will not appreciate your neutrality.” Bishop Desmond Tutu
Seriously... I'm curious... can anyone explain in non-technical terms what a shell is? n what this is about. Please....
These are the real account information that applies to the underlying Unix operating system. UIDs, groups, shells, etc, are all standard fare for Unix/Linux systems.
BTW, don't play with these settings unless it's on a secondary account or you really know what you are doing. You could lock yourself out of your machine.
The Shell, is the command line interface (CLI), "Terminal" in Mac speak. When you are in the CLI, you are actually using a program called a "shell". By default, on OS X it is the "bash" shell (also available on other systems including Linux, Solaris, etc). There are other shells such as the original "sh", the very popular "csh", "zsh", etc. The shell is actually very powerful, it has a scripting language, variables, debugging tools, lots of built in commands, etc.
"Do the Right Thing. It will gratify some people and astound the rest." - Mark Twain
The default shell in OSX was tcsh; that changed to bash in 10.3x. If you upgraded from an earlier OS to 10.3 (and then to 10.4, etc), you will still have tcsh as the default; it has to be changed to bash manually (ie via the Terminal).
New, full installs of 10.3x or later have bash as the default, with tcsh and zsh included, should you wish to switch to either one.