I have the code below. If I want to loop through PKA1 through PKA24, how do i do that, without manually typing it all out
cd PKA1/1keV/
rm cascade.dump
cd ../../
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3 Answers
I'd consider using something like this
rm PKA{1..24}/1keV/cascade.dump
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This is OK as long as you are using
bash.Bob Eager– Bob Eager2017-07-19 22:31:01 +00:00Commented Jul 19, 2017 at 22:31 -
1@Bob it's tagged bashChris Davies– Chris Davies2017-07-19 22:39:56 +00:00Commented Jul 19, 2017 at 22:39
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1Good point! I always tend to go for more generic answers, I guess.Bob Eager– Bob Eager2017-07-19 22:42:42 +00:00Commented Jul 19, 2017 at 22:42
The first thing is that you don't have to be in a directory to remove the file, so you could just say:
rm PKA1/1keV/cascade.dump
rm PKA2/1keV/cascade.dump
etc. However, a loop can be used:
for i in $(seq 24); do
rm PKA$i/1keV/cascade.dump
done
(the seq command generates the number 1 to 24 automatically)
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Or just
rm PKA{1..24}/1keV/cascade.dump. orfind . -name cascade.dump -type f -delete.DopeGhoti– DopeGhoti2017-07-19 22:28:57 +00:00Commented Jul 19, 2017 at 22:28 -
The comment about
bashalso applies here. Thefindsolution is a bit dangerous, as there might be other subdirectories containingcascade.dumpthat you don't want to delete.Bob Eager– Bob Eager2017-07-19 22:32:12 +00:00Commented Jul 19, 2017 at 22:32
'find' is your answer:
First use it with 'echo' to check out that everything will work correctly. I suppose that you don't care about the same filename in more PKA directories.
find PKA* -name "cascade.dump" -exec rm {} \;
Otherwise you have to fix the first pattern.
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That will also hit directories such as
PKA99(if it exists) whereas the OP as specified onlyPKA1..PKA24. Your-exec rm{} \;kicks off an instance ofrmfor every file. While there are only 24 it's not a big deal but for a large number it files it could be. You'd be better with-deleteif it exists for yourfindversion, which doesn't fork any separate processes.Chris Davies– Chris Davies2017-07-19 22:47:55 +00:00Commented Jul 19, 2017 at 22:47 -
You are true. I warned him about more directories. Because he told about a dump file I supposed that he has more and he does not care; also I mention this.Nicholas Christopoulos– Nicholas Christopoulos2017-07-19 22:54:07 +00:00Commented Jul 19, 2017 at 22:54