bash script for showing last users

[vassu]

Hi! I'm new in scripting and I need some help with one simple script. I have to write a program that shows in a predetermined period (using "last" command), to draw up a list of users who have used the machine during this period. Each user to indicate how many sessions it has been during this period. Output must be sorted alphabetically by usernames (increasing alphabetically). Can someone help

[vassu]

The code should be something like:
cat lastfile | cut -c1-8 | egrep -v '(^reboot)|(^$)|(^wtmp a)|(^ftp)' | sort | uniq -c | sort -rn

But how to I predetermine the period and sort alphabetically(increasing)?

[vassu]

I understand that id I want to sort by user name then

sort -k 2

number means the field to sort. So now I have only some code but still nos script:

cat lastfile | cut -c1-8 | egrep -v '(^reboot)|(^$)|(^wtmp a)|(^ftp)' | sort | uniq -c | sort -k 2

Script should show something like this:

Example:\\>users.sh  Oct 26 11:00 - Oct 27 14.00
 SESSIONS      USER              LAST LOGIN
   12              userA      Tue Oct 27 13:45 - 13:50  (00:04)
    3               userB      Tue Oct 27 13:31   still logged in
    5               userC      Tue Oct 27 13:31   still logged in
   ...              .......        ............................................