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Old 08-21-2021, 10:10 PM   #16
elnetotaca
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I will do nd thanks again for the extra info!

Last edited by elnetotaca; 08-21-2021 at 10:11 PM. Reason: non whatsoever.
 
Old 08-22-2021, 10:36 AM   #17
MadeInGermany
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$[arith]
is a deprecated bash-only style.
The new standard for an arithmetic expression is
$((arith))
 
Old 08-23-2021, 04:53 AM   #18
pan64
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additionally probably I would try to remove that link before [re]creating it. Otherwise it may have "strange" side effects.
 
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Old 08-24-2021, 12:42 AM   #19
ondoho
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What "strange" side effects? The '-sf' options to 'ln' have never failed me so far.
 
Old 08-24-2021, 12:55 AM   #20
NevemTeve
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When symlinks to directories are involved, option `-sfn` might be even safer.
 
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Old 08-24-2021, 12:57 AM   #21
pan64
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Quote:
Originally Posted by ondoho View Post
What "strange" side effects? The '-sf' options to 'ln' have never failed me so far.
That is my paranoid "side". Usually removing requires fewer permissions than this ln. But you are right, probably in a single user environment it is pointless.
 
Old 08-24-2021, 02:48 AM   #22
GazL
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As Nev' says, existing links pointing to directories can result in unexpected outcomes.

GNU's ln has the -n, or -T options to deal with this situation, but POSIX adherents will need to remove any existing link with rm -f prior to creating a new one to avoid this issue catching them out.

Getting back to OPs original question: I would have used the following for this job:
random_mp3=$( printf "%s\n" *.mp3 | shuf -n 1 )

Last edited by GazL; 08-24-2021 at 02:58 AM.
 
Old 08-24-2021, 08:38 PM   #23
elnetotaca
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Quote:
Originally Posted by GazL View Post
As Nev' says, existing links pointing to directories can result in unexpected outcomes.

GNU's ln has the -n, or -T options to deal with this situation, but POSIX adherents will need to remove any existing link with rm -f prior to creating a new one to avoid this issue catching them out.

Getting back to OPs original question: I would have used the following for this job:
random_mp3=$( printf "%s\n" *.mp3 | shuf -n 1 )
Thank you very much.
So far I have NO PROBLEMS whatsoever, so I will stick with it.
but THANK YOU again!!!!!
 
Old 08-25-2021, 02:10 AM   #24
GazL
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Quote:
Originally Posted by elnetotaca View Post
Thank you very much.
So far I have NO PROBLEMS whatsoever, so I will stick with it.
but THANK YOU again!!!!!
No worries: it's all good.
 
  


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