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Full Discussion: UNIX Basics about shell and editors and default settings
Top Forums UNIX for Dummies Questions & Answers UNIX Basics about shell and editors and default settings Post 302955697 by ysvsr1 on Sunday 20th of September 2015 09:38:03 PM
Old 09-20-2015
UNIX Basics about shell and editors and default settings
Hi all,
I have 3-4 years of experience working on unix environment. I am not a beginner, but unix is not my primary skill set. I am very good at awk programming and doing many of my tasks very well, really very weak on basics. I moved to a new job recently and the settings there are driving me nuts. Following are my questions:

1) Who decides what shell would be default when we login to unix enviroment? Is there any way we can overide it?

2) I am currently using korn shell and i was using the same shell in my old job, but i am not able to mimic mostly of the usual commands and functionality at my new environment. The things that are driving me nuts is :

- not able to use arrows on command line , gives me garbage
- escape \ to get the command history
- autocomplete the filenames
- when i use the vi editor, it does even tell me which mode i am in, when i press insert it changes the case of the text
- not able to use page up and page down to scroll through scripts

Many other things. they are very basic but i am so used to all these settings , it is literally driving me nuts. Can someone help me what settings need to be done?

Also some one can point to some books/documentation to understand the basics about shells and the settings and different editors how and when to use it would really help me a lot ! Thanks in advance .
 

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LEARN ABOUT OPENDARWIN

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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