[SOLVED] bash script reading specified lines from multiple files and concatenating into one
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bash script reading specified lines from multiple files and concatenating into one
Hi Everyone!
I'm trying to write a little bash script to go into sub directories and find all the files named *.cluster.summary, grab lines 13, 36, and 40 through to the end of the file, and then paste/concatenate those lines into one single outputfile. Each *cluster.summary file is two directories down (i.e. ./firstdirectory/directorywithfileinit/), and although lines 13 and 36 will always exist, the length of the file after line 40 varies. Importantly, I have a similar set of *.cluster.summary files in parent directories that I don't want to copy lines from. I think I need to use a simple for loop like the one below, but I can't work out how to specify the lines and make sure that it doesn't go into parent directories. Any suggestions would be most appreciated!
#!/bin/bash
for clustersummaries in *.cluster.summary
do
sed -n '13,36,40' $clustersummaries >> clusteroutputfile
done
Thanks for the suggestion Shivaa - I gave it a try and it works for just finding one of the *cluster.summary files but I have ~200 of them in separate sub-directories that I want to be able to get the loop to go through recursively. Also - why the tmp file? I want to keep the output file to look at later, am I misunderstanding the function of the tmp piece? Here are the adjustments I made that saves the output file in the parent directory where I want it - I just need to work out the "search recursively through all subdirectories for *cluster.summary files" bit (and then get rid of the cd ./firstdirectory...?)
#!/bin/bash
cd ./firstdirectory/directorywithfileinit/
for file in *.cluster.summary
do
echo "Reading file $file"
awk 'NR ~ /^(13|36|40)$/ {print}' $file >> ../../clusteroutputfile.txt
done
Ah - the find cmd addition works a treat. However - I noticed that the line search piece grabs ONLY lines 13,36, and 40; what I want it to do is grab line 13, line 36, and then all lines from 40 onwards to the end of the file. How would I denote that?
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