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mahmoodn

01-21-2011 09:28 AM

how to get the last line of an output

I want to write a bash script to run a command and get the last line of the output of that command.
For example, the output of "cat /proc/zoneinfo" is:

Code:

Node 0, zone      DMA

  pages free    3948

        min      2

        low      2

        high    3

        scanned  0

        spanned  4080

        present  3807

    nr_free_pages 3948

.....

.....

  vm stats threshold: 70

  all_unreclaimable: 0

  prev_priority:    12

  start_pfn:        6422528

  inactive_ratio:    8

How can I get the last line in a separated format?

Nylex

01-21-2011 09:31 AM

To get the last line, you can use

tail -n 1 /proc/zoneinfo

See the man page for tail for more details. What do you mean by "separated format"?

pwc101

01-21-2011 09:32 AM

Code:

tail -1 /proc/zoneinfo

mahmoodn

01-21-2011 11:11 AM

Thanks. it was useful

trickykid

01-26-2011 01:10 PM

On a side note, proc files can change. If you know what you really need from it, grep for the pattern you wish to grab.

grep inactive_ratio /proc/zoneinfo

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