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A shell is a program that takes your commands from the keyboard and gives them to the operating system. Most Linux systems utilize Bourne Again SHell (bash), but there are several additional shell programs on a typical Linux system such as ksh, tcsh, and zsh. The simplest way to check which shell your machine has is to type any random letters and hit enter. For example, Lonestar in TACC uses bash.
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login1$ ffkakldk -bash: ffkakldk: command not found |
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