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  Keep in mind the Channel when adding new RAMs in sockets The Dell PowerEdge T420 server has 12 DIMM slots. For optimal performance, it is recommended to install RAM in pairs of matching capacity and speed. We already have two 4 GB models placed in white DIMMS.  We added two more so keep in mind the number that is mentioned on the motherboard DIMMS places. The system contains 12 memory sockets split into two sets of six sockets, one set per processor. Each six-socket set is organized into three channels. In each channel, the release levers of the first socket are marked white and the second black. NOTE:  DIMMs in sockets A1 to A6 are assigned to processor 1 and DIMMs in sockets B1 to B6 are assigned to processor 2. Figure 35. Memory Socket Locations find PowerEdge-t420_owners-manual_en-us page# 69 RAM channels , specifically dual-channel and quad-channel memory configurations, are used to improve memory bandwidth and overall system performance. These configurations are ...
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Fix Error installation of EXSI 8.0 (Requested Malloc size xxxxxxxx failed........fatal error :10 (out of resources))

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  The requested malloc size 186079680 by failed, caller offset 0xeffob4f0 Fatal error:10 (Out of  resources) Fixed with the following step-by-step approach. Cause: This error most of the time caused by bootable use is not properly bootable for the ESXi server. 1-Make bootable with the help of Rufus   2-boot system UEFI Boot Mode The Second Error is fallowing Last step  1- reboot and press Shift+O at booting time 2- Edit line   allowLegacyCPU=true  press Enter. ہارڈ ویئر اس کی سپورٹ نہیں کر رہا جس کی وجہ یہ ایرر آئی ہے Even after making the last step, this error did not disappear آخر میں حل یہ تھا کہ میں نے اپنا پچھلا ورژن انسٹال کیا  ESXI 7.3u ۔
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Persistent configure of bridge by use of YAML

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 This is a persistent Configuration of the bridge by use of YAML Default  YAML file 01-network-manager-all.yaml  is the default  YAML file for network configuration. we need to edit according to the need. First, we configure the interface in the YAML file and Apply it to ubuntu 22.04 Linux YAML is spaces for indentation, for example, a network is an object have a key: value pair version is key and 2 is a value with the use of double spaces as an indent from the network . object =network key = renderer value = networkd
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Bridge Network Example

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 There are many utilities from the bridge Network like bridge-util ,   iproute2 ,netplen, nmcil and ebtables, etc. Here we use iproute2: Man page of IP command The Frist OBJECT link is used for devices at the Layer 2 (data link connectivity )levels.  The subcommand of the link Object are:  show, set, add, and del . For example in the above image   ip -c -br link show:  Show Layer 2 info about the devices  the Layer 2 information of both interfaces lo and enp0s3 for the default bridge To Group the devices zero is the default group so we can create a new group 1 to the vi group file name red. we can modify the attributes  sudo ip link set  dev lo group red  sudo ip link set  dev enp0s3 group red sudo ip link show group red sudo ip link set  dev enp0s3 up or sudo ip link set  dev enp0s3 down sudo ip link del dev docker0 (Delet docker0 virtual bridge) sudo ip link add dev mybridge type bridge (Add mybridge virtual bridge wit...
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Who to Connect Physical Machine with Virtual Machine

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 Bridge: the bridge is layer 2 devices or software connecting different segments(media independent) from one logical segment(single broadcast domain). although the network segments belong to different mediums (wire and wireless). Example: we have logical network 192.168.1.0/24                    Take two hosts with physical networks eth0 and eth1 which belong to the same subnet(Broadcast domain). OR                  eth0 IP :  192.168.1.2 (physical NIC Host-a) and  eth1 IP:   192.168.1.3 (host A-NIC)                     eth0 IP :  192.168.1.2 (physical NIC) and  enp0s3 IP:   192.168.1.3 (vNIC) OR                  eth0 IP:   192.168.1.2 (physical NIC) and wlan0 IP:   192.168.1.3 (wifi NIC) ...
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Create Customization or Manual Partition in Linux

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 There is Step by Step procedure to create a partition manually. 1. Take Raw Hard disk The hard disk is without partition and formatting there is nothing on it. 2. Create Partitions(MBR or GPT) what is a partition : it is a logical division of the whole raw hard disk. Three types of partition in the MBR partition system. Primary partition (we have a limit to creating 4 partitions only) Extended partition (when we need more than 4 partitions we create one extended partition) Logical partition (we can create multiple partitions in extended a partition) Note:  Extended Partition is not bootable and also one extended partition per hard disk which is not directly formatted but uses the logical partition. 3. Create Volume After formatting with File System and Assige the Letter we can use the partition.  
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Use of SSH Protocol

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SSH Protocol is used in Serval Services as Demone. what is Demone? The daemon is a Background process that runs in a system without user interaction. The program file of the daemon is end with the letter d usually in Linux/Unix-based systems. Note: Process is the Program that is run in the Memory(RAM) for example, HTTP Service uses httpd as a daemon program SSH Service uses sshd .    /etc/init.d/sshd keypair SFTP SCP rsync X11 Forwarding etc......
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