Sendmail smtp auth under CentOS 6

1.Get signed server certificate for auth

2. edit as below : (port 587 is listened by default, no need to add in the mc)

define(`confAUTH_OPTIONS’, `A p y’)dnl TRUST_AUTH_MECH(`LOGIN PLAIN’)dnl define(`confAUTH_MECHANISMS’, `LOGIN PLAIN’)dnl define(`confCACERT_PATH’,`/etc/pki/tls/certs’) define(`confCACERT’,`/etc/pki/tls/certs/gd_bundle.crt’) define(`confSERVER_CERT’,`/etc/pki/tls/certs/server.crt’) define(`confSERVER_KEY’,`/etc/pki/tls/certs/server.key’) DAEMON_OPTIONS(`Port=465,Addr=, Name=MTA’)

3. install saslauthd, make sure the below are installed :

cyrus-sasl-plain cyrus-sasl-devel cyrus-sasl-lib […]

Use NOOP I/O Scheduler for virtualized Linux guest with kernel 2.6 guest on vmware

Refer to

The scheduler can be set for each hard disk unit. To check which scheduler is being used for particular drive, run this command:

cat /sys/block/disk/queue/scheduler

For example, to check the current I/O scheduler for sda:

# cat /sys/block/sda/queue/scheduler [noop] anticipatory deadline cfq

In this example, the sda drive scheduler is set to […]

Linux 2.6+ tuning for Data Transfer hosts connected at speeds of 1Gbps or higher

Nagios nrep “NRPE: Unable to read output” after using sudo

edit /etc/sudoers and comment the below :

#Defaults requiretty

Windows 7 autologin

Use netplwiz

Enhanced vMotion Compatibility (EVC) with creating a cluster or the required license

In short

Edit CPUID Mask in vsphere at “Level 1 section” and for “ecx” :

—- –0- —- —- —- —- —- –0-