Difference between revisions of "Command Line Exercises"
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| + | = Command-line Exercises = | ||
| + | Many of these are so called throwaway one-liners | ||
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| + | In each of these examples we show the finished one-liner first, and then proceed to build it up | ||
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| + | = Extract columns from files held in differenrt subfolders = | ||
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| + | We shall run a for-loop in the shell environment and execute an awk column-selecting command for a certain file called '''report.tsv''' | ||
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| + | == Finished Command == | ||
| + | for i in $(ls -d */); do S=$(echo ${i%/*}); export S; awk '{if(NR!=1){if($19 != ".") {system("./echon.sh $S"); printf "\t%s\t%s\t%s\t%s\t%s\n",$2,$15,$17,$19,$20}}}' ${i}report.tsv;echo;done >a.xls | ||
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| + | = for-loop over the subfolders = | ||
Revision as of 16:56, 12 April 2017
Contents
Command-line Exercises
Many of these are so called throwaway one-liners
In each of these examples we show the finished one-liner first, and then proceed to build it up
Extract columns from files held in differenrt subfolders
We shall run a for-loop in the shell environment and execute an awk column-selecting command for a certain file called report.tsv
Finished Command
for i in $(ls -d */); do S=$(echo ${i%/*}); export S; awk '{if(NR!=1){if($19 != ".") {system("./echon.sh $S"); printf "\t%s\t%s\t%s\t%s\t%s\n",$2,$15,$17,$19,$20}}}' ${i}report.tsv;echo;done >a.xls
