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Full Discussion: How to do user-preset login to Bash shell then automate path modification?
Top Forums Shell Programming and Scripting How to do user-preset login to Bash shell then automate path modification? Post 303012313 by rbatte1 on Friday 2nd of February 2018 04:01:01 AM
Old 02-02-2018
I'm not quite sure what you are trying to achieve. I think you are wanting to customise the environment by settings the PATH, variables, current directory etc. You would be better writing a script with the settings in and the you can source it.

Something like:-
my_env_1
Code:
PATH=/my_path1:$PATH
cd /my_dir1
BASE_VAR="DEV1"

my_env_2
Code:
PATH=/my_path2:$PATH
cd /my_dir2
BASE_VAR="DEV2"

etc.

You can then (from the shell prompt or within a sh/ksh/bash script) do source my_eny_1 or shorthand, you could . my_env_2 and it will set the various variables/values/directory etc. in the current shell. You could even (in .bashrc perhaps) create an alias to call this in for you, e.g. alias DEV1='source my_env_1 would allow you to just type DEV1 on the command line to set it up.

You need to be careful because switching back & forth between these two would grow the PATH variable each time, possibly leading to confusion.


Does that help, or have I missed the request entirely?

Robin
Last edited by rbatte1; 02-02-2018 at 05:06 AM..
 

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LEARN ABOUT POSIX

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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