why we have different shells? Post: 302269108

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I have came across the definitions of these shells korn bourne c etc .. but honestly till now i din't get the exact difference between these threes , the advantages ..... can anyone pinpoint me where it actually lies ..... don;t include me answers like aliasing in c is posible and not in bourne .....

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Hello there, i just want to know what are the different type of shells and the main difference betwee them. The problem is that if you try to search over the net you will find a lot of information and hence you will have no enough time to read all of them.....Anyone can help with this??

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What is the practical difference among the different shell like csh , ksh , bash etc.:confused::confused: Please use descriptive subjects instead of single words

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ple tell me What is the diff between ksh,sh,bash and csh

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Lets say my default shell is bash and then i load up csh and then ksh. How would i exit csh without exiting ksh? so basically i gone from bash > csh > ksh and i wish to close csh

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I'm taking a LINUX and UNIX class and we are using bash as the shell in terminal. On my mac-book I use zsh only because my professor had a pretty cool start-up file for it. It has benefited me in becoming familiar with different shells. However, I'm having a hard time understanding the purpose...

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Please what are shells?

I mean like this: http://shells.red-pill.eu/ Can anyone explain how this works? I hope my post is not spam. I think its related to linux. Thank you

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chsh

CHSH(1)                                                            User Commands                                                           CHSH(1)

NAME

       chsh - change login shell

SYNOPSIS

       chsh [options] [LOGIN]

DESCRIPTION

       The chsh command changes the user login shell. This determines the name of the user's initial login command. A normal user may only change
       the login shell for her own account; the superuser may change the login shell for any account.

OPTIONS

       The options which apply to the chsh command are:

       -h, --help
           Display help message and exit.

       -R, --root CHROOT_DIR
           Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory.

       -s, --shell SHELL
           The name of the user's new login shell. Setting this field to blank causes the system to select the default login shell.

       If the -s option is not selected, chsh operates in an interactive fashion, prompting the user with the current login shell. Enter the new
       value to change the shell, or leave the line blank to use the current one. The current shell is displayed between a pair of [ ] marks.

NOTE

       The only restriction placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker is the superuser,
       and then any value may be added. An account with a restricted login shell may not change her login shell. For this reason, placing /bin/rsh
       in /etc/shells is discouraged since accidentally changing to a restricted shell would prevent the user from ever changing her login shell
       back to its original value.

FILES

       /etc/passwd
           User account information.

       /etc/shells
           List of valid login shells.

       /etc/login.defs
           Shadow password suite configuration.

SEE ALSO

       chfn(1), login.defs(5), passwd(5).

shadow-utils 4.5                                                    01/25/2018                                                             CHSH(1)

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chsh