Суммарное время, проведенное на kappa по вторникам (если время меньше 10 минут, то соответствующее поле оставлено пустым):

login    | Mar  5 | Mar 12 | Mar 19 | Mar 26 | Apr  2 | Apr  9 | Apr 16 | Apr 23 | Apr 30 | May  7 | May 14 | May 21 | 
ananin   |  01:34 |  05:47 |  01:52 |  01:37 |  02:23 |  00:51 |  ----- |  02:40 |  02:46 |  04:48 |  00:23 |  00:47 | 
kirilich |  01:30 |  ----- |  ----- |  ----- |  01:24 |  00:35 |  01:06 |  01:19 |  ----- |  ----- |  01:10 |  ----- | 
marinin  |  01:38 |  02:01 |  02:12 |  00:49 |  01:50 |  01:58 |  01:27 |  01:05 |  04:33 |  02:24 |  05:35 |  01:26 | 
otlivanc |  02:08 |  01:21 |  03:41 |  ----- |  02:29 |  00:59 |  01:26 |  01:02 |  00:46 |  02:14 |  00:57 |  02:50 | 
pytko    |  01:34 |  02:17 |  05:14 |  09:31 |  06:49 |  05:30 |  00:40 |  06:03 |  00:44 |  02:11 |  09:27 |  01:36 | 
solomato |  02:27 |  05:33 |  03:31 |  17:51 |  03:38 |  02:53 |  00:36 |  01:56 |  ----- |  ----- |  06:21 |  00:25 | 
surikov  |  03:42 |  02:39 |  01:47 |  03:42 |  01:35 |  01:36 |  01:45 |  01:10 |  01:34 |  05:45 |  03:33 |  01:07 | 
kryshen  |  ----- |  00:55 |  ----- |  01:33 |  ----- |  02:12 |  ----- |  02:50 |  ----- |  04:43 |  ----- |  ----- | 
lazareva |  ----- |  00:49 |  00:21 |  01:30 |  00:55 |  01:04 |  ----- |  02:59 |  00:48 |  01:25 |  00:57 |  03:32 | 
rafalson |  00:36 |  01:02 |  ----- |  00:41 |  01:33 |  01:31 |  ----- |  ----- |  00:31 |  ----- |  ----- |  00:27 | 
simakov  |  ----- |  01:30 |  ----- |  ----- |  01:27 |  01:35 |  00:14 |  05:38 |  00:12 |  00:32 |  ----- |  01:12 | 
simanovi |  ----- |  00:50 |  ----- |  01:22 |  01:07 |  01:15 |  ----- |  01:29 |  ----- |  00:37 |  ----- |  00:13 | 
gorinov  |  01:37 |  02:27 |  ----- |  ----- |  00:59 |  ----- |  ----- |  01:17 |  ----- |  ----- |  01:33 |  ----- | 
poikalai |  ----- |  ----- |  ----- |  ----- |  05:57 |  ----- |  01:12 |  ----- |  ----- |  ----- |  ----- |  ----- | 
radzhabo |  01:11 |  ----- |  ----- |  ----- |  01:29 |  ----- |  ----- |  ----- |  ----- |  ----- |  01:05 |  ----- | 
belov    |  01:27 |  ----- |  ----- |  ----- |  01:33 |  ----- |  ----- |  00:52 |  ----- |  ----- |  01:36 |  ----- | 
kuznecov |  01:34 |  00:17 |  ----- |  ----- |  01:26 |  ----- |  00:26 |  01:19 |  ----- |  ----- |  01:31 |  ----- | 
sarv     |  01:24 |  00:51 |  01:24 |  ----- |  ----- |  ----- |  00:18 |  02:57 |  01:13 |  ----- |  01:20 |  ----- | 
stepanov |  01:05 |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- | 
chegesov |  01:03 |  ----- |  01:04 |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- | 
ilin     |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- | 
voronov  |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  00:27 |  ----- |  ----- |  ----- | 
shitov   |  ----- |  00:13 |  ----- |  ----- |  ----- |  ----- |  ----- |  00:12 |  ----- |  ----- |  ----- |  ----- | 
pyanzin  |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- | 
medvedev |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- | 
taibakov |  04:05 |  01:26 |  01:39 |  ----- |  01:14 |  00:31 |  ----- |  ----- |  00:12 |  01:18 |  01:24 |  01:19 | 
kuznecov |  01:34 |  00:17 |  ----- |  ----- |  01:26 |  ----- |  00:26 |  01:19 |  ----- |  ----- |  01:31 |  ----- | 
charov   |  ----- |  ----- |  00:48 |  ----- |  02:53 |  00:23 |  ----- |  ----- |  ----- |  ----- |  00:41 |  00:30 | 
hairutdi |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- | 
ivanovz  |  ----- |  03:56 |  06:01 |  07:32 |  01:48 |  02:59 |  ----- |  04:05 |  04:15 |  03:48 |  05:25 |  05:57 | 
kuricyn  |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- |  ----- | 
ptichkin |  ----- |  ----- |  01:53 |  ----- |  ----- |  ----- |  00:14 |  ----- |  ----- |  ----- |  ----- |  01:34 | 
yakovlev |  01:36 |  ----- |  01:51 |  ----- |  00:30 |  02:11 |  04:34 |  ----- |  ----- |  ----- |  01:56 |  04:00 | 

Программа на языке shell, с помощью которой была получена таблица:

#!/bin/sh

# заголовок таблицы
printf "%-8s | " "login"
for day in "Mar  5" "Mar 12" "Mar 19" "Mar 26" \
  "Apr  2" "Apr  9" "Apr 16" "Apr 23" "Apr 30" \
  "May  7" "May 14" "May 21" 
do
  printf "%6s | " "$day"
done
printf "\n"

# цикл по login'ам
for login in \
  ananin kirilich marinin otlivanc pytko solomato surikov \
  kryshen lazareva rafalson simakov simanovi \
  gorinov poikalai radzhabo \
  belov kuznecov sarv stepanov chegesov \
  ilin voronov shitov pyanzin medvedev taibakov kuznecov charov hairutdi \
  ivanovz kuricyn ptichkin yakovlev 
do

  # вывести login в начале строки
  printf "%-8s | " $login

  # цикл по вторникам
  for day in "Mar  5" "Mar 12" "Mar 19" "Mar 26" \
    "Apr  2" "Apr  9" "Apr 16" "Apr 23" "Apr 30" \
    "May  7" "May 14" "May 21"
  do

    # подсчет суммарного времени (awk), 
    # которое провел $login (last -f wtmp $login)
    # за сутки $day (grep "$day") на kappa
    time=`
      last -f wtmp $login |\
      grep "$day" |\
      awk '
        BEGIN { s = 0 } 
        { s += 60 * substr($10, 2, 2) + substr($10, 5, 2) }   
        END { if (s > 10) printf("%02d:%02d", s/60, s%60); else printf("-----") }
      '
    `

    # вывод суммарного времени
    printf "%6s | " "$time"

  # конец цикла по вторникам
  done

  # перевод строки
  printf "\n"

# конец цикла по login'ам
done

Т.к. считается суммарное время то если открыто 3 терминала в течении 1.5 часа то общее время получается 4.5 часа.