Very Computer

I am fairly new to UNIX, but keen to learn. I have a few scripts I am trying
to write and was wondering if anyone could be of some assistance?

Script 1.
I am trying to display/list the top 15 users of HDD space, and if they
exceed the quota (5000KB) then display "Yes" next to their name, and "NO" if
they haven't.

Script 2.
List any inactive users or users that haven't logged on for 3 months.

Script 3.
Make a script called "IP". Then if I run IP device_name  (where device_name
is a device on the network) it returns the IP address of the device.

I have had a good go at the 3 scripts, but not having too much luck. Any
help would be greatly appreciated.

Milan.

--
Richard Howlett

Quote:> > Script 1.
> > I am trying to display/list the top 15 users of HDD space, and if they
> > exceed the quota (5000KB) then display "Yes" next to their name, and
"NO" if
> > they haven't.

> How about posting what you have already attempted from your homework
> assignment?

clear
tabs 2,33,45,60,75   #set tab positions

echo "Top 15 USERS of HDD (Students)"
echo "\tUser Name \tFull Name \tHDD Usage (in KB) \tEXCEEDED QUOTA? "

du -s /home/student/* | while read line  #process only users in
/home/student directory

do
     set -- $line
     hddusage=$1
     userid=`echo $2|cut -d"/" -f4`
     fullname=`grep "^$userid" /etc/passwd | cut -d":" -f5`
     if test "$1" -gt 5000
     then
          exquota="Yes"
     else
          exquota="No"
     fi
     echo "\t$hddusage \t$userid \t$fullname \t$exquota " >> student_list
done

sort -r -n student_list | tail +15 > student_top15_list   #Sorts students by
descending order of HDD usage

cat student_top15_list | while read line
do
     set -- $line
     hddusage=$1
     userid=$2
     fullname=$3
     exquota=$4
     echo "\t$userid \t$fullname \t$hddusage \t$exquota "
done

1. "tabs" doesn't work as I'd expect on my system. You may be better off
using printf to get your fields tabulated nicely. printf will also allow you
to right justify the usage figure.
2. You will need the -k option of du to get your usage value in kb.
3. "read" can read more than one variable so I would change your read
statement to something like ...... while read hddusage homedir .....
4. Which means the set and next line down are not needed.
5. The assignment of userid can now be made much simpler with basename or in
ksh or bash ${homedir##*/}
man basename
6. The test line should now be written as:  if [ $hddusage -gt 5000 ]
7. Rather than using >> to add to the file for each line processed redirect
stdout after the "done" statement. Eg: done > student_list
8. You need to use head instead of tail to get the top 15
9. If you don't need the intermediate file you could continue the pipeline
to the sort and therefore remove the reference to student_file in the sort
command. Furthermore this pipeline could also include the while read of your
output stage making: done | sort -rn |head -15 |while read line ; do
10. You should put the variable that can have multiple words ($fullname) at
the end so your echo becomes: echo "\t$hddusage \t$userid \t$exquota
\t$fullname"
11. Swap fullname and exquota around in your output loop, put a "shift 3"
after exquota and assign fullname using: fullname=$*

I am by no means the cleanest coder here but here is a working example to
show the solution I came up with:

clear
echo "Top 15 USERS of HDD (Students)"
echo "User Name  Full Name                  Usage  EXCEEDED QUOTA?"
du -sk /home/student/* |\
while read hddusage homedir ; do
    userid=${homedir##*/}
    exquota=No
    if [ $hddusage -gt 5000 ] ; then
        exquota=Yes
    fi
    echo "$hddusage:$userid:$exquota:\
`grep "^$userid" /etc/passwd |cut -d":" -f5`"
done |sort -rn |head -15 |\
awk -F: '{printf "%-10s %-25s %6s  %-3s\n",$2,$4,$1,$3}'

--
Richard Howlett

OK, script 2 is supposed to show a list of users who have not logged on, or
who haven't logged on for 3 months or more.

Using the header:

INACTIVE USERS (Students) as at <todays date>
User Name        Full Name                Last Logged on

here is what I have written, but cannot seem to get any users from:

clear
date '+INACTIVE USERS (Students) as at %d %b %y'
echo "User Name Full Name  Last Logged on"

finger /home/students/* |tail +3 |head -1 |\
while read line ; do
     userid=${homedir##*/}
     currentmonth='date "+ %m"'
     lastonmonthnumber=0
     if [ $1 == "Never" ] ; then
          lastonmonth=Never
     else
          lastonmonth=$3
     fi
     if [ $4 == "Jan" ] ; then
          lastonmonthnumber=4
     elif [ $4 == "Feb"  ] ; then
          lastonmonthnumber=5
     elif [ $4 == "Mar" ] ; then
          lastonmonthnumber=6
     elif [ $4 == "Apr" ] ; then
          lastonmonthnumber=7
     elif [ $4 == "May" ] ; then
          lastonmonthnumber=8
     elif [ $4 == "Jun" ] ; then
          lastonmonthnumber=9
     elif [ $4 == "Jul" ] ; then
          lastonmonthnumber=10
     elif [ $4 == "Aug" ] ; then
          lastonmonthnumber=11
     elif [ $4 == "Sep" ] ; then
          lastonmonthnumber=12
     fi
     if [ $lastonmonthnumber -le $currentmonth ] ; then
          echo "$userid:$lastonmonth:\
          `grep "^$userid" /etc/passwd | cut -d":" -f5`"
          awk -F: '{printf "%-12s %-24s %-25s\n",$1,$3,$2}'
     fi
done

Quote:> clear
> date '+INACTIVE USERS (Students) as at %d %b %y'
> echo "User Name Full Name  Last Logged on"

> finger /home/students/* |tail +3 |head -1 |\

How many lines do you think "head -1" will give you?
Will that line give you the information you need?

Quote:> while read line ; do
>      userid=${homedir##*/}

Quote:>      currentmonth='date "+ %m"'

Quote:>      lastonmonthnumber=0
>      if [ $1 == "Never" ] ; then
>           lastonmonth=Never
>      else
>           lastonmonth=$3

Quote:>      fi
>      if [ $4 == "Jan" ] ; then

Quote:>           lastonmonthnumber=4

Quote:>      elif [ $4 == "Feb"  ] ; then
>           lastonmonthnumber=5
>      elif [ $4 == "Mar" ] ; then
>           lastonmonthnumber=6
>      elif [ $4 == "Apr" ] ; then
>           lastonmonthnumber=7
>      elif [ $4 == "May" ] ; then
>           lastonmonthnumber=8
>      elif [ $4 == "Jun" ] ; then
>           lastonmonthnumber=9
>      elif [ $4 == "Jul" ] ; then
>           lastonmonthnumber=10
>      elif [ $4 == "Aug" ] ; then
>           lastonmonthnumber=11
>      elif [ $4 == "Sep" ] ; then
>           lastonmonthnumber=12
>      fi
>      if [ $lastonmonthnumber -le $currentmonth ] ; then
>           echo "$userid:$lastonmonth:\

Quote:>           `grep "^$userid" /etc/passwd | cut -d":" -f5`"
>           awk -F: '{printf "%-12s %-24s %-25s\n",$1,$3,$2}'
>      fi
> done

currentmonth=`date +%m`

for dir in /home/students/*
do
    finger `basename $dir` | {
      read _ userid _ username ### underscore '_' is a throw-away
      read _
      read ever _ day lastonmonth date time

      if [ "$lastonmonth" != "Never" }
      then
          ### do your calculations here

      fi
    }
done

--
    Chris F.A. Johnson                        http://cfaj.freeshell.org
    ===================================================================
    My code (if any) in this post is copyright 2001, Chris F.A. Johnson
    and may be copied under the terms of the GNU General Public License

Also you sent an email with exactly the same message? I read the newsgroup
every day so there was no need to email me.

--
Richard Howlett