Monthly Archives: December 2016


To monitor the number of LVE fault
"lveinfo --display-username --show-all --limit=25 --order-by=any_faults --by-fault=any -r 1 -d 1 --period=5m | tee /dev/stderr

To monitor the number of LVE with max CPU usage >90%
"lveinfo --display-username --show-all --limit=25 --order-by=cpu_max --by-usage=cpu_max -p 90 -d 1 - iod=5m | tee /dev/stderr

To show I/O:
"lveinfo --display-username --show-all --limit=25 --order-by=io_max --by-usage=io_max -p 90 -d 1 -period=5m | tee /dev/stderr

enable kvm nested

cat /sys/module/kvm_intel/parameters/nested
Temporarily remove the KVM intel Kernel module, enable nested virtualization to be persistent across reboots and add the Kernel module back:

sudo rmmod kvm-intel
sudo sh -c “echo ‘options kvm-intel nested=y’ >> /etc/modprobe.d/dist.conf”
sudo modprobe kvm-intel
Ensure the Nested KVM Kernel module parameter for Intel is enabled on the host:

cat /sys/module/kvm_intel/parameters/nested

modinfo kvm_intel | grep nested
parm: nested:bool

postgrey whitelist hotmail or outlook

vi /etc/postfix/postgrey_whitelist_clients

# Do NOT greylist MX servers (see dig in mx

# Do NOT greylist ANY host from or


killall postgrey
service start postgrey


postgrey[30881]: action=pass, reason=client whitelist,, client_address=, sender=

You also can whitelist * and etc