Re: current directory and use of login scripts

On Fri, 23 Apr 2021 15:31:46 -0500, Daniel L Newhouse
<[email protected]> wrote:

Usually, do not use the .profile script.  Furthermore, 

One advantage of bash’s ability to look for either synonym is that you
can retain your .profile if you have been using the Bourne shell. If
you need to add bash-specific commands, you can put them in
.bash_profile followed by the command source .profile. When you log
in, all the bash-specific commands will be executed, and bash will
source .profile, executing the remaining commands. If you decide to
switch to using the Bourne shell you don’t have to modify your
existing files. A similar approach was intended for .bash_login and
the C shell .login, but due to differences in the basic syntax of the
shells, this is not a good idea. .bash_profile is read and executed
only by the login shell. If you start up a new shell (a subshell) by
typing bash on the command line, it will attempt to read commands from
the file .bashrc. This scheme allows you the flexibility to separate
startup commands needed at login time from those you might need when
you run a subshell. If you need to have the same commands run
regardless of whether it is a login shell or a subshell, you can just
use the source command from within .bash_profile to execute .bashrc.
If .bashrc doesn’t exist then no commands are executed when you start
up a subshell.

Cameron Newham. Learning the bash Shell (In a Nutshell (O'Reilly))
(pp. 89-90). O'Reilly Media. Kindle Edition. 

>On Wed, 21 Apr 2021 20:36:36 -0500, Daniel L Newhouse
><[email protected]> wrote:
>
>A file must have copy and delete enabled for the move command to work
>on it.
>
>>On Wed, 21 Apr 2021 20:04:17 -0500, Daniel L Newhouse
>><[email protected]> wrote:
>>
>>
>>ls -al is the way to view files in Unix.  That way you can see your
>>startup scripts and the write permissions on your files.  Change the
>>write permissions with chmod.
>>
>>
>>>On Tue, 20 Apr 2021 12:52:34 -0500, Daniel L Newhouse
>>><[email protected]> wrote:
>>>
>>>There is a web site on all the prompt strings
>>>
>>>https://idojo.co/how-to-set-a-custom-bash-shell-prompt-string-ps0-ps1-ps2-ps3-ps4-in-linux/
>>>
>>>PS1    The  value  of  this parameter is expanded (see PROMPTING
>>>below)
>>>       and used as the primary prompt string.   The  default  value is
>>>       ``\s-\v\$ ''.
>>>PS2    The  value of this parameter is expanded as with PS1 and used
>>>as
>>>       the secondary prompt string.  The default is ``> ''.
>>>PS3    The value of this parameter is used as the prompt for the
>>>select
>>>       command (see SHELL GRAMMAR above).
>>>PS4    The  value  of  this  parameter  is expanded as with PS1 and
>>>the
>>>       value is printed before each command bash displays during an
>>>ex-
>>>       ecution trace.  The first character of the expanded value of
>>>PS4
>>>       is replicated multiple times, as necessary, to indicate
>>>multiple
>>>       levels of indirection.  The default is ``+ ''.
>>>
>>>
>>>>On Mon, 19 Apr 2021 10:02:42 -0500, Daniel L Newhouse
>>>><[email protected]> wrote:
>>>>
>>>>
>>>>.profile is the login script.  
>>>>
>>>>PS1 is called a "prompt string."
>>>>
>>>>>On Sat, 17 Apr 2021 23:48:43 -0500, Daniel L Newhouse
>>>>><[email protected]> wrote:
>>>>>
>>>>>.bashrc in the home directory is the startup script.
>>>>>
>>>>>>On Sun, 28 Mar 2021 19:52:47 -0500, Daniel L Newhouse
>>>>>><[email protected]> wrote:
>>>>>>
>>>>>>"\s-\v\w$" is the best it will ever be, a $ before the prompt.  
>>>>>>
>>>>>>
>>>>>>>On Sun, 28 Mar 2021 18:40:31 -0500, Daniel L Newhouse
>>>>>>><[email protected]> wrote:
>>>>>>>
>>>>>>>The fact that there is no startup script, however, means that you have
>>>>>>>to change PS1 every time you restart cygwin!
>>>>>>>
>>>>>>>I also vote for Minix compatibility.
>>>>>>>
>>>>>>>>On Sun, 28 Mar 2021 18:35:48 -0500, Daniel L Newhouse
>>>>>>>><[email protected]> wrote:
>>>>>>>>
>>>>>>>>>K, the syntax is "\s-\v\w".  What I posted was a typo.  Parts of these
>>>>>>>>>Kindle books aren't searchable.  Try searching on "PS1" to find it in
>>>>>>>>>Bash from O'Reilly.  
>>>>>>>>
>>>>>>>>
>>>>>>>>Also, IIRC, ending the prompt with a '~' indicates a working
>>>>>>>>directory, which is normal, whereas ending it with a '$' indicates an
>>>>>>>>absolute path.