So we've examined covered a lot number of "framework" issue topics – argument handling, stream handling, error handling – in a systematic way. This section presents various tips and tricks for actually manipulating data, which can be useful both in writing scripts and in command line manipulations.
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Add a count to the unique run lines then sort on it numerically, in reverse order. The 1st line will then be the job with the most lines (jobs). | Code Block |
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| cat joblist.txt | cut -f 2 | sort | uniq -c | sort -k1,1nr | head -1
# 23 SA13038 |
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field delimiter issues
sort – default delimiter is whitespace; change with -t or --field-separator option
| utility | default delimiter | how to change | example |
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| cut | tab | -d or --delimiter option | cut -d ':' -f 1 /etc/passwd |
| sort | whitespace | -t or --field-separator option | sort -t ':' -k1,1 /etc/passwd |
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