The setup Having physical server pA, running VMs using KVM. One of theVMs (vA) acts as an NTP server. pA gets the time from vA
Category: Administration
Things that concern a systems or network administrator.
Multiple relay configuration based on sender address with sendmail
One of the needs that came up was to be able to use separate relay configurations based on the sender email address, using sendmail. The
IPsec, Racoon, setkey, Linux, Mikrotik, tunnel, transport and everything
It took me more than 6 months in order to sort all issues, so here are the experiences. Most of the trouble was because I
rsync as root with rrsync and sudo
Here’s how to rsync something to a remote host as root without allowing root logins and with directory restriction. I did that because I wanted
Linux Containers: Easy LXC
Linux containers (a.k.a. LXC) rock. It’s the ultimate way of having multiple Linux boxes with minimal requirements. Here’s how I do it under Debian (and
Big nfs_inode_cache
The story Boxes with various kernel versions have weird free memory problems. After examining the memory usage it seems that processes don’t add up to
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