[ale] bash commands

[Damon L. Chesser]

On Sat, 2012-05-19 at 10:54 -0400, arxaaron wrote:
> On 2012/05/18, at 17:55 , Drifter wrote:
> 
> > Thanks.  That did it.
> >
> > sean
> >
> 
> 
> Pipes ["|"] are for moving output across processes.
> 
> I suspect that bash was trying to run your empty text file
> as a process.  "Permission Denied" was an appropriate
> error message.
> 
> Redirects [">" | ">>"] are for writing output streams to files.
> The first version appends to the file (and creates it if it doesn't
> exist),  the second "double" form overwrites the file (or creates
> it if it doesn't exist)

Aaron,

I think you got it backwards:

damon at dam-main:~/Desktop$ touch testredirect.xt
damon at dam-main:~/Desktop$ echo 1 > testredirect.xt 
damon at dam-main:~/Desktop$ echo 2 > testredirect.xt 
damon at dam-main:~/Desktop$ cat testredirect.xt 
2
damon at dam-main:~/Desktop$ echo 1 >> testredirect.xt 
damon at dam-main:~/Desktop$ cat testredirect.xt 
2
1


> 
> HTH
> peace
> aaron
> 
> > ------------------------------------------------------------------------------------
> >
> > On Friday, May 18, 2012 05:37:43 pm Robert L. Harris wrote:
> >> try ">" instead of "|"
> >>
> >> On Fri, May 18, 2012 at 3:27 PM, Drifter <drifter at oppositelock.org>
> > wrote:
> >>> I keep reminding myself that I don't begin to know what I think I
> >>> know! :(
> >>>
> >>> I am about to upgrade this box, finally from FC 13 to FC 14.
> >>> Ought to be simple enough.  I have the CD, which I think will do a
> >>> clean install onto a software RAID.
> >>>
> >>> Prior to that I really ought to have on hand a list of all the
> >>> installed packages.
> >>>
> >>> So I created a file <app_list.txt> on the Desktop and then tried
> >>> this:
> >>>
> >>> yum list installed | ~/Desktop/app_list.txt
> >>> and got back this
> >>>
> >>> bash: /home/kilpatms/Desktop/app_list.txt: Permission denied
> >>>
> >>> WTF!
> >>>
> >>> So I checked the perms on the existing (empty) file and they were
> >>> correct. Then I tried the same thing as root, expanding the ~/ and
> >>> got the same response.
> >>>
> >>> So, How DO I make yum throw a list of the installed packages to a
> >>> text file rather than to the terminal?
> >>>
> >>> Sean
> >>>
> >>>
> >>> _______________________________________________
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> 
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-- 
Damon
damon at damtek.com