how to get the last line of an output

mahmoodn · 01-21-2011, 09:28 AM

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