Converting crt to PEM
Took two steps:
openssl x509 -in input.crt -out input.der -outform DER
openssl x509 -in input.der -inform DER -out output.pem -outform PEM
Every Linux admin is familiar with the long time running through a large directory tree (with hundred of thousands of files and more) can take. Most are aware that if you re-run the same run-through, it will be shorter. This is caused by a short-valid filesystem cache, where the memory is allocated to other tasks,…
I was playing a bit with iSCSI initiator (client) and decided to see how complicated it is to setup a shared storage (for my purposes) through iSCSI. This proves to be quite easy… On the server: 1. Download iSCSI Enterprise Target from here, or you can install scsi-target-utils from Centos5 repository 2. Compile (if required)…
Using udev to set persistent raw devices for iscsi in Oracle RAC
This is a rather common knowledge now that on RHEL4 you need to state inside /etc/modprobe.conf the following line, when you want more than one bonding interfaces: options bonding max_bonds=2 Then you attempt to use a trick to address different bonding devices with their name (aka, bond0 and bond1, and maybe bond2, etc), using an…
Performance tuning is a sort of art. You know what you expect to reach, and you somehow strive towards that through selective tuning. Either your OS memory utilization, your network settings, NFS mount parameters, etc. I’ve been to a customer who’s server acted funny. First, it had high load average – for an idle server…
Due to a major disk crash, I have had to use my ‘other’ computer for VPN connections. It meant that I have had to prepare it for the operation. I attempted to login to aJuniper-based SSL-VPN connection, however, I did get a message saying that my 64bit Java was inadequate. I had a link, as…
Every Linux admin is familiar with the long time running through a large directory tree (with hundred of thousands of files and more) can take. Most are aware that if you re-run the same run-through, it will be shorter. This is caused by a short-valid filesystem cache, where the memory is allocated to other tasks,…
I was playing a bit with iSCSI initiator (client) and decided to see how complicated it is to setup a shared storage (for my purposes) through iSCSI. This proves to be quite easy… On the server: 1. Download iSCSI Enterprise Target from here, or you can install scsi-target-utils from Centos5 repository 2. Compile (if required)…
Using udev to set persistent raw devices for iscsi in Oracle RAC
This is a rather common knowledge now that on RHEL4 you need to state inside /etc/modprobe.conf the following line, when you want more than one bonding interfaces: options bonding max_bonds=2 Then you attempt to use a trick to address different bonding devices with their name (aka, bond0 and bond1, and maybe bond2, etc), using an…
Performance tuning is a sort of art. You know what you expect to reach, and you somehow strive towards that through selective tuning. Either your OS memory utilization, your network settings, NFS mount parameters, etc. I’ve been to a customer who’s server acted funny. First, it had high load average – for an idle server…
Due to a major disk crash, I have had to use my ‘other’ computer for VPN connections. It meant that I have had to prepare it for the operation. I attempted to login to aJuniper-based SSL-VPN connection, however, I did get a message saying that my 64bit Java was inadequate. I had a link, as…
Every Linux admin is familiar with the long time running through a large directory tree (with hundred of thousands of files and more) can take. Most are aware that if you re-run the same run-through, it will be shorter. This is caused by a short-valid filesystem cache, where the memory is allocated to other tasks,…
I was playing a bit with iSCSI initiator (client) and decided to see how complicated it is to setup a shared storage (for my purposes) through iSCSI. This proves to be quite easy… On the server: 1. Download iSCSI Enterprise Target from here, or you can install scsi-target-utils from Centos5 repository 2. Compile (if required)…