Monitoring Commands

w        -- To Check the load on Server

df -h    -- To check the disk space utilization of server

free -m  -- To check the memory utilization of server

vzlist   -- Shows list of Virtual Machines

vzctl enter vpid -- To enter into the vps

ps -auxf -- To check the running process of Server

who      -- check who is on the server

lastlog  -- check who was has been on the server

tail -f /var/log/messages -- To check the logs

tail -f /usr/local/psa/var/log/maillog -- Plesk Server Qmail Logs

tail -f /var/log/secure  -- Monitor login attempts
Command to disable email service on plesk server /usr/local/psa/bin/domain.sh -u  "Domain name" -mail_service false

netstat -i :- Display list of all open ports

ifconfig -a   Network card and IP address information

top - Process Activity Command

vmstat - System Activity, Hardware and System Information

vmstat -m Report Virtual memory statistics(Display Memory utilization stableinfo)

route -n Display routing information
route

more /etc/network/interfaces :- Debian / Ubuntu Linux network configuration file (all interface eth0,eth1,...ethN)

df -h :- Find out disk space usage

du -h :- Find/Estimate file space usage:

ulimit -a Find out user limits

lsmod :- Find out installed device drivers (modules)

cat /proc/cpuinfo : - Find out information about Linux CPU

cat /proc/meminfo :- Find out information about Linux Memory



View login related logs:-

tail -f /var/log/secure
vi /var/log/secure
grep 'something' /var/log/secure


View mail server related logs:-

tail -f /var/log/maillog
vi /var/log/maillog
grep 'something' /var/log/maillog