#===============================================
#Exercise #2 sample Answer exercise02commands.sh
#===============================================
#
#Student Name:                 Ben Dover
#Algonquin EMail Address:      abcd0001
#Student Number:               074-210-779 
#Course Number:                DAT2330  
#Lab Section Number:           014 
#Professor Name:               Ian Allen 
#Assignment Name/Number/Date:  Exercise #2 due February 3, 2004
#Comment:                      one of two files

# show the current date and time
date
# show the current working directory
pwd
# show the system date and time in upper case
date | tr '[a-z]' '[A-Z]' 
# show only the time (4th field) from the system date and time
date | awk '{print $4}'
# show a simple count of the number of logged in users
who | wc -l
# checksum the last 5 lines of sorted password file
sort /etc/passwd | tail -5 | sum
# show "reboot" occurances in listing of last logged in users
last | grep "reboot"
# show the top 20 hosts (not reboot) in descending order by number of logins
last -a | grep -v "reboot" | awk '{print $10}' | sort | uniq -c | sort -nr | head -20