Other articles

1. Offer name on dhcp request (to set dns) on Centos 7

   Edit Network Script

   Edit /etc/sysconfig/network-scripts/ifcfg-XXXXX

   Append:

   DHCP_HOSTNAME="$(hostname -s)"
   

   read more

2. LetsEncrypt remote installation and renew

   Generate Certificate

   I have not tested this recently so revise when completing again

   letsencrypt certonly -d <website> --manual --manual-public-ip-logging-ok
   

   Then follow the same steps as for renewing

   The required apache config is below:

   SSLEngine on
   SSLProtocol all -SSLv2 -SSLv3
   SSLCipherSuite HIGH:!ADH:!EXPORT:!SSLv2:RC4+RSA:+HIGH:+MEDIUM
   
   SSLCertificateFile ...

   read more

3. XenServer 6.5 + mdadm raid stripe

   Enable Raid stripe module

   1. Create file /etc/sysconfig/modules/raid.modules with needed modules

   echo "modprobe raid1" > /etc/sysconfig/modules/raid.modules

   you can add lines for another raid level (raid0 or raid10 for example)

   1. Make this file executable

   chmod +x /etc/sysconfig/modules/raid.modules

   1. Reboot.

   May not survive ...

   read more