Here is a quick reference to convert SSL certificate in different formats Converting PEM encoded certificate to DER #openssl x509 -outform der -in certificate.pem -out certificate.der Converting DER encoded certificate to PEM #openssl x509 -inform der -in certificate.cer -out certificate.pem Converting PEM encoded certificates to PKCS7 (P7B) #openssl crl2pkcs7 -nocrl… Read more »
After creating software RAID and installing Redhat / CentOS, boot records need to be set on all participating hard drives in order it to fail safely (RAID 10 in following scenario). This is how boot records can be set for each hard disk. #grub … Read more »
VIM is a defecto standard for Redhat / CentOS and other Unix like operating systems, and it is THE favorite choice of sysadmins as well. Here are my quick notes on using VIM. Key /Key combination #Description ^ … Read more »
Most of the time system administrators manage servers over the network or internet. It is very rare that a physical access is required. Now a days with cloud and stuff happening a Linux admin just need a SSH access to the server for day to day tasks. However, VNC allows… Read more »
Quick setup configuration file for Squid proxy server. Make backup of your existing squid.conf and replace the contents with following, service squid restart, you will be good to go. Squid will restart in transparent proxy mode. Cheers!