Space storage shell script issue! Post: 302550187

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Top Forums Shell Programming and Scripting Space storage shell script issue! Post 302550187 by itkamaraj on Thursday 25th of August 2011 01:40:24 AM

08-25-2011

Registered User

Code:

 
nawk '/%/ {if(length($(NF-1))> 2) {a=substr($(NF-1),1,length($(NF-1))-1); if(a > 30){print $0}}}'

/%/  --> Match % and process the lines which is having %
$(NF-1) --> Print the value of (last - 1) column value (disk usage column)
length($(NF-1)) --> Get the length of the disk usage column.
if(length($(NF-1))> 2  --> check the length is greater than 2 ( It will eliminate the usage which is less than 10%)
a=substr($(NF-1),1,length($(NF-1))-1);  --> Strip the % value from the disk usage column ( eg: 85% to 85 )
then check a > 30, then print the line.
More example for understaing :
echo "abc edf ghi" | awk '{ print $NF }'            # prints the last record value
echo "abc edf ghi" | awk '{ print $(NF-1) }'  # prints the last-1 record value
echo "abc edf ghi" | awk '{ print $(NF-2) }'  # prints the last-2 record value
echo "abcd efg hi" | awk '{print length($1)}'  # prints the lenght of first record
echo "abcd efg hi" | awk '{print length($2)}'  # prints the lenght of second record
echo "abcd efg hi" | awk '{print length($3)}'  # prints the lenght of third record
echo "abcdefg" | awk '{ print substr($0,1,2)}'   # prints 2 letters from the 1st position

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LEARN ABOUT PHP

pg_field_name

PG_FIELD_NAME(3)														  PG_FIELD_NAME(3)

pg_field_name - Returns the name of a field

SYNOPSIS

       string pg_field_name (resource  $result, int  $field_number)

DESCRIPTION

       pg_field_name(3)  returns the name of the field occupying the given $field_number in the given PostgreSQL $result resource. Field numbering
       starts from 0.

       Note

	       This function used to be called pg_fieldname(3).

PARAMETERS

	      o $result
		- PostgreSQL query result resource, returned by pg_query(3), pg_query_params(3) or pg_execute(3) (among others).

	      o $field_number
		- Field number, starting from 0.

RETURN VALUES

	The field name, or FALSE on error.

EXAMPLES

       Example #1

	      Getting information about fields

	      <?php
		$dbconn = pg_connect("dbname=publisher") or die("Could not connect");

		$res = pg_query($dbconn, "select * from authors where author = 'Orwell'");
		$i = pg_num_fields($res);
		for ($j = 0; $j < $i; $j++) {
		    echo "column $j
";
		    $fieldname = pg_field_name($res, $j);
		    echo "fieldname: $fieldname
";
		    echo "printed length: " . pg_field_prtlen($res, $fieldname) . " characters
";
		    echo "storage length: " . pg_field_size($res, $j) . " bytes
";
		    echo "field type: " . pg_field_type($res, $j) . " 

";
		}
	      ?>

	      The above example will output:

	      column 0
	      fieldname: author
	      printed length: 6 characters
	      storage length: -1 bytes
	      field type: varchar

	      column 1
	      fieldname: year
	      printed length: 4 characters
	      storage length: 2 bytes
	      field type: int2

	      column 2
	      fieldname: title
	      printed length: 24 characters
	      storage length: -1 bytes
	      field type: varchar

SEE ALSO

       pg_field_num(3).

PHP Documentation Group 													  PG_FIELD_NAME(3)