#Linux Linux 101 : Creating logical volumes - Physical volumes, Volume groups, Logical volumes - LVM - logical volume manager - offers up the flexibility: to grow a storage space to have a storage space that can spam multiple disks to combine several September 19, 2022 Share
#Istio Istio 101 : An overview of the architecture A service mesh is the software that connects services and containerized applications that are running as pods . It also manages traffic control, the di September 15, 2022 Share
#storage Storage 101 : Object storage and Block storage Bock storage: Bock storage manages data in blocks that are accessed using the iSCSI protocol for example. The end user accesses block storage over the n September 10, 2022 Share
#storage Storage 101 : Types of storage - File storage, Object storage and Block storage - Below is a simple diagram that depicts the types of storage: NAS - Network Area Network: In file storage - NAS -, the computation overhead is embedded w September 08, 2022 Share
#Linux Linux 101 : The boot process Below is a simplified diagram of the boot process of a Linux system: Remark: The UFEI is the new version of the BIOS and the GPT is the new version of t September 06, 2022 Share
#Linux Linux 101 : Background and Foreground processes By adding an ampersand - & - character to a command, we tell Linux to run it in the background and return to the shell prompt, allowing us to use September 01, 2022 Share
#Linux Linux 101 : Monitoring storage usage To monitor the disk usage for our mounted filesystems, we could use the below command: -h : outputs the results in human-readable format - gigabyte or August 29, 2022 Share
#Linux Linux 101 : Formatting, mounting and using a USB flashrive To check that a USB flash drive was recognized by a Linux system, we use the " lsusb " command: To show the disks and their partition, we could August 26, 2022 Share
#docker Docker 101: remove docker from Ubuntu As I am currently preparing my home lab and I faced some networking issues with an arm64 deployment of Ubuntu and Docker, I now prefer to start from August 24, 2022 Share
#security Security 101 : DNS poisoning DNS poisoning changes the HOSTS file - maps hostnames to addresses - . It works by changing an IP addresses to point to a malicious site instead of the August 24, 2022 Share
#Linux Linux 101 : the "/dev" directory - character and block devices - Linux devices - disks, keyboards, terminals, ... - exist as files in the in the " /dev " directory. Devices can be refered to using their path August 22, 2022 Share
#Virtualization Virtualization 101 : Type 1 and type 2 hypervisors Type 2 hypervisors run on an existing - host - operating system The - guest - operating systems running in the virtual machines have access the hardware August 19, 2022 Share
#Istio Istio 101 : How is the envoy proxy side car added to our pods/deployments Istio uses kubernetes admission webhooks to add a sidecar into an existing deployment of pods. We start by going into the istio namespace where we want August 17, 2022 Share
#Istio Istio 101 : Istio's pre-set installation profiles Istio has a set of pre-defined installation mode to make it easier for us to set up our first services mesh successfully. To see more details about eac August 15, 2022 Share
#Linux Linux 101 : Files permissions The chmod command helps us change the access permissions for our files. The permissions of a file look like below: The chmod command can use the the oc August 12, 2022 Share
#Istio Istio 101 : Managing network bottlenecks with the DestinationRule resource - TCP and HTTP connections - We could use the destination rule parameters to help alleviate bottlenecks and slowness caused by a rise in requests for an application. Some of the pa August 10, 2022 Share
#Istio Istio 101 : Basic retries using a Virtual Service When having issues connecting to an application,we could configure the " retry " parameter for the client application requests. The number of August 08, 2022 Share