linuxgeek: Re: [LINUX_Newbies] Re: Grep questions

Wednesday, July 17, 2013

Re: [LINUX_Newbies] Re: Grep questions

Good afternoon
Mi Jul 17 16:39:46 2013
Thank You for help.

> | > Normally, $HOME/bin. So:
> | > - log in
> | > - type "pwd" to check that you are in you home directory
> | > - type "mkdir bin" to create a directory called "bin" in your home
> | > directory
> | *
> | Is it better for not confuse myself to name it mybin
> | ?
>
> Your call.
*
OK
The idea is
doing update or start a new Linux at new computer:

bin is looking like Linux created
mybin is looking: Oh, Sophie created it You have to backup this.

But since it is in your home directory, it should already
> be obvious that it is for you.
>*
OK

> | > Then you need to put $HOME/bin into your $PATH.
> | >
> | > You can do this by running the command:
> | >
> | > PATH=$PATH:$HOME/bin
> | > export PATH
> | *
> | Thank You.
> |
> | Then Linux is searching
> | when I give comand like dothisnow
> | in the
> | directory
> | bin or mybin
> | for
> | dothisnow.sh.
> |
> | ?
>
> No. It searches for an executable file named "dothisnow".
*
Ok.
But where?
In the path directories or the whole hd?

> Windows does that oddball "add an extension". In UNIX, what you
> type is what is looked for.
*
OK
>
> Normally you do not end _commands_ in an extension saying what the
> language is. Instead, for scripts the leading shebang line:
>
> #!/bin/sh
>
> tells the kernel what program will be used to run the script.

*
OK
>
> So you make a script and store it as "/home/user1/bin/dothisnow".
> It starts with the line:
>
> #!/bin/sh
>
> When you issue the command "dothisnow a b c", if the kernel finds
> your script it will execute the actual command:
>
> /bin/sh /home/user1/bin/dothisnow a b c
*
Thank You.
>
> getting the "/bin/sh" from the first line of the script.
> In this way you can write scripts in different languages depending
> on your needs, and make them up so that the kernel knows how to run
> them.
+
thank You.
>
> As another example, a Python script would normally have a shebang
line like:
>
> #!/usr/bin/python

*
OK

>
> | > That does it only for the shell you ran it in.
> | *
> | This does mean
> | I close the terminal
> | and Linux will forget it.
>
> Yes.
>

Regards
Sophie