Missing NIC in cloned VirtualBox VM


If you ever encounter similar error 'Device eth0 does not seem to be present, delaying initialization' in the cloned VirtualBox VM, the fix is to remove this file (/etc/udev/rules.d/70-persistent-net.rules) and reboot the VM. The reason is that the new cloned VM generates new MAC addresses which do not match the previous ones that have been recorded … Continue reading Missing NIC in cloned VirtualBox VM

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Setup LDAP authentication in CentOS (openldap+sssd)


1) Install openldap server in CentOS 6.5 yum install -y openldap* 2) Copy the sample slapd.conf configuration cp /usr/share/openldap-servers/slapd.conf.obsolete /etc/openldap/slapd.conf 3) Generate encrypted password for later use slappasswd 4) Modify /etc/openldap/slapd.conf, use the encrypted password created in above step. #TLSCACertificatePath /etc/openldap/certs #TLSCertificateFile "\"OpenLDAP Server\"" #TLSCertificateKeyFile /etc/openldap/certs/password database monitor access to * by dn.exact="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth" read by … Continue reading Setup LDAP authentication in CentOS (openldap+sssd)

Apache Rewrite Rule Flags – NE


I was working on an Apache URL redirection request this morning. The task is to redirect the URL ‘^/example/1’ to ‘/#example1’. My first configuration is something like below. When I test it, the redirected URL becomes …/%23example1 instead of …/#example1. RewriteRule ^/example/1(/)?$ %{HTTP_HOST}/#example1 [R,L,NC] As you see the problem is that the redirection automatically convert … Continue reading Apache Rewrite Rule Flags – NE