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Using sed, how do you print the first 'N' characters of a line?
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edited Jan 13 at 13:43
Paulo Mattos
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How do I redirect output to a variable in shell? [duplicate]
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Use the $( ... ) construct:
hash=$(genhash --use-ssl -s $IP -p 443 --url $URL | grep MD5 | gr...
Find all files with a filename beginning with a specified string?
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3 Answers
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How to skip “are you sure Y/N” when deleting files in batch files
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answered Aug 23 '11 at 11:34
Kerrek SBKerrek SB
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Unsigned keyword in C++
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tacaswell
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answered Jan 20 '10 at 8:14
futureelite7futur...
How do I get SUM function in MySQL to return '0' if no values are found?
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Use COALESCE to avoid that outcome.
SELECT COALESCE(SUM(column),0)
FROM table
WHERE ...
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Get pandas.read_csv to read empty values as empty string instead of nan
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The way to check a HDFS directory's size?
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Prior to 0.20.203, and officially deprecated in 2.6.0:
hadoop fs -dus [directory]
Since 0.20.203 (dead link) 1.0.4 and still compatible through 2.6.0:
hdfs dfs -du [-s] [-h] URI [URI …]
You can also run hadoop fs -help for more info ...
Difference between Dictionary and Hashtable [duplicate]
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edited May 3 '11 at 16:53
Gabe
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