oh. so '*' searches the first string in the lines.... I understand that
now.
and $ matches the end string of lines. I get it now!
:-)~MIKE~(-:
On Sat, Mar 7, 2015 at 8:43 AM, sean <
sean.a.ritzler@gmail.com> wrote:
> $ matches the end of line. You don't get any output because that file
> doesn't have any lines ending in 'bmike1'. That's why it was recommended
> that you grep for a shell.
>
> You are getting the same output with and without the ^ because it happens
> to be that bmike1 always appears at the beginning of the line in that file.
> Create a new file with these two lines:
>
> My name is bmike1
> bmike1 is my name
>
> Then do grep ^bmike1, grep bmike1 and just grep bmike1 (no -E necessary).
> On Mar 7, 2015 8:34 AM, "Michael Havens" <bmike1@gmail.com> wrote:
>
>> Okay, I tried to grep my passwd file with and without the '^' and it
>> seems both are the same. What's the difference between the commands and why
>> should I bother to type the '^'? As to the '$' if all it does is produces a
>> blank linr what is it's use?
>>
>> bmike1@c521 ~ $ grep -E '^bmike1:' /etc/passwd
>> bmike1:x:1000:1000:Michael Havens,,,:/home/bmike1:/bin/bash
>> bmike1@c521 ~ $ grep -E 'bmike1:' /etc/passwd
>> bmike1:x:1000:1000:Michael Havens,,,:/home/bmike1:/bin/bash
>> bmike1@c521 ~ $ grep -E 'bmike1$:' /etc/passwd
>> bmike1@c521 ~ $ grep -E 'bmike1$' /etc/passwd
>> bmike1@c521 ~ $
>>
>>
>> :-)~MIKE~(-:
>>
>> On Fri, Mar 6, 2015 at 11:39 PM, der.hans <PLUGd@lufthans.com> wrote:
>>
>>> Am 06. Mär, 2015 schwätzte Michael Havens so:
>>>
>>> moin moin Mike,
>>>
>>> when using regular expressions '$' matches the end of the line and '^'
>>> matcheѕ the beginning of the line. So, '^$' matches a blank line.
>>>
>>> grep -E '^fred:' /etc/passwd # shows the entry for fred's account
>>>
>>> grep -E ':/bin/bash$' /etc/passwd # shows all of the accounts that have
>>> bash as their shell
>>>
>>> ciao,
>>>
>>> der.hans
>>>
>>>
>>> I'm going through the BASH manual at The Linux Documentation Project and
>>>> was going over special characters. They say that 'a "$" addresses the
>>>> end
>>>> of a line bash'. Huh; what does that mean? You see on my blog that I had
>>>> another special character I was wondering about but my web search
>>>> revealed
>>>> to me what was hidden. My web search in this case turns up a lot of
>>>> stuff
>>>> too. None of it relevant though. Could you wonderful people of Plug
>>>> remove
>>>> the scales from my eyes?
>>>> :-)~MIKE~(-:
>>>>
>>>>
>>> --
>>> # http://www.LuftHans.com/ http://www.PhxLinux.org/
>>> # "Metrosexuals notwithstanding, quiche still lacks something." --
>>> David Brin
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>>>
>>
>>
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