Monitoring Process and User
##Display Statistics of Users Connect Time
# ac
##Display Statistics of Users Day-wise
# ac -d
##Display Time Totals for each User
# ac -p
##Display Individual User Time
# ac tecmint
##Display Day-Wise Logn Time of User
# ac -d tecmint
##Print All Account Activity Information
# sa
##Print Individual User Information
# sa -u
##Print Number of Processes
# sa -m
##Print Sort by Percentage
# sa -c
##List Last Executed Commands of User
# lastcomm tecmint
##Search Logs for Commands
# lastcomm ls
#iotop -o -b