Hello all,
first let me apologize if you find this question too stupid to post it
to this group :-)
I have some problem with swap space utilization and for this reason I
would like to log some information from lsof command.
I would like to parse lsof output line by line, take the first field
(command column of output table) and pick up only diffrrent names for
commands. Then I would like to make count for each differrent command
found - to find out how many times the command has been issued.
Thnx a lot in advance.
NoE

NoE wrote:
> Hello all,
> first let me apologize if you find this question too stupid to post it
> to this group :-)
> I have some problem with swap space utilization and for this reason I
> would like to log some information from lsof command.
> I would like to parse lsof output line by line, take the first field
> (command column of output table) and pick up only diffrrent names for
> commands. Then I would like to make count for each differrent command
> found - to find out how many times the command has been issued.
> Thnx a lot in advance.
> NoE
>

"man awk"

>>sigh<< really helpful....

base60 wrote:
[..]

oh, please. do not answer me with such guru-from-unix-heaven answers.
they are just statements, not helping at all.

base60 wrote:
[..]

"NoE" <dusankm> wrote in message news:3220
> Hello all,
> first let me apologize if you find this question too stupid to post it
> to this group :-)
> I have some problem with swap space utilization and for this reason I
> would like to log some information from lsof command.
> I would like to parse lsof output line by line, take the first field
> (command column of output table) and pick up only diffrrent names for
> commands. Then I would like to make count for each differrent command
> found - to find out how many times the command has been issued.
> Thnx a lot in advance.
> NoE
>

The usual idiom for counting things is to pipe them through
sort and then uniq -c (and then perhaps sort -n).

get list of things to count | sort | uniq -c | sort -n

lsof | sed 's/ .*//' | sort | uniq -c | sort -n

Thnx a lot John, it proves to be so simple (I thought about loops
etc.:-) )

"NoE" <dusankm> wrote in message news:3220
: Hello all,
: first let me apologize if you find this question too stupid to post it
: to this group :-)
: I have some problem with swap space utilization and for this reason I
: would like to log some information from lsof command.
: I would like to parse lsof output line by line, take the first field
: (command column of output table) and pick up only diffrrent names for
: commands. Then I would like to make count for each differrent command
: found - to find out how many times the command has been issued.
: Thnx a lot in advance.
: NoE
:

You don't have to parse the data. man lsof:

-F f This option specifies a character list, f, that selects the
fields to be output for processing by another program, and the
character that terminates each output field. Each field to be
output is specified with a single character in f. The field
terminator defaults to NL, but may be changed to NUL (000).
See the OUTPUT FOR OTHER PROGRAMS section for a description of
the field identification characters and the field output
process.

When the field selection character list is empty, all standard
fields are selected (except the raw device field and zone
field for compatibility reasons) and the NL field terminator
is used.

When the field selection character list contains only a zero
(`0'), all fields are selected (except the raw device field
for compatibility reasons) and the NUL terminator character is
used.

Other combinations of fields and their associated field termi-
nator character must be set with explicit entries in f, as
described in the OUTPUT FOR OTHER PROGRAMS section.

When a field selection character identifies an item lsof does
not normally list - e.g., PPID, selected with -R - specifica-
tion of the field character - e.g., ``-FR'' - also selects the
listing of the item.

When the field selection character list contains the single
character `?', lsof will display a help list of the field
identification characters. (Escape the `?' character as your
shell requires.)

If you google mercer and lsof you should run into some scripts I wrote
and posted.

Dan mercer