sorting - Linux - numerical sort then overwrite file -


i have csv file general format

date,   2013.04.04, 2013.04.04, 2012.04.02, 2013.02.01, 2013.04.05, 2013.04.02,

a script run add data file not in date order. how can sort file date order (ignoring header) , overwrite existing file rather writing stdout

i have used awk

awk 'nr == 1; nr > 1 {print $0 | "sort -n"}' file > file_sorted mv file_sorted file

is there more effective way without creating additional file , moving?

you can following:

sort -n -o your_file your_file

-o defines output file.

output

$ cat s date,   2013.04.04, 2013.04.04, 2012.04.02, 2013.02.01, 2013.04.05, 2013.04.02,  $ sort -n -o s s  $ cat s date,   2012.04.02, 2013.02.01, 2013.04.02, 2013.04.04, 2013.04.04, 2013.04.05,

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