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Combined display of all available logs of HPCWIKI. You can narrow down the view by selecting a log type, the username (case-sensitive), or the affected page (also case-sensitive).

• 18:16, 16 June 2023 Admin talk contribs created page Ulimit (Created page with "'''<code>ulimit</code>''' is a built-in Linux shell command that allows '''viewing or limiting system resource amounts''' that individual users consume. Limiting resource usage is valuable in environments with multiple users and system performance issues. ''limits.conf'' file is a configuration file that defines the system resource allocation settings '''<code>ulimit</code>''' uses. The full path to the configuration file is ''/etc/security/limits.conf''. Changing th...") Tag: Visual edit
• 17:08, 16 June 2023 Admin talk contribs created page Hugepage (Created page with "Hugepage support is required for the large memory pool allocation used for packet buffers (the HUGETLBFS option must be enabled in the running kernel as indicated the previous section). By using hugepage allocations, performance is increased since fewer pages are needed, and therefore less Translation Lookaside Buffers (TLBs, high speed translation caches), which reduce the time it takes to translate a virtual page address to a physical page address. Without hugepages, h...") Tag: Visual edit
• 16:29, 16 June 2023 Admin talk contribs moved page Network performance terminology to Network performance test
• 09:08, 16 June 2023 Admin talk contribs created page Network performance terminology (Created page with "== Throughput == throughput means as data transfer rate or digital bandwidth consumption and denotes the achieved average useful bit rate in a com- puter network over a physical communication link. so it is measured below the network layer and above the physical layer, e.g, data link layter in OSI 7 layer concept. In network terminology, one Kbit/s means 1,000 bit/s and not 1,024 bit/s == Round trip time == Round trip time (RTT) is the total amount of time that a pac...") Tag: Visual edit
• 13:42, 15 June 2023 Admin talk contribs created page Ubuntu tips and tricks (Created page with "== apt-get update “the following signatures couldn’t be verified because the public key is not available” == <syntaxhighlight lang="bash"> $ sudo apt update Err:5 https://packages.cloud.google.com/apt kubernetes-xenial InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B53DC80D13EDEF05 #need to add the missing Key B53DC80D13EDEF05 $sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys B53DC80D13ED...") Tag: Visual edit
• 19:55, 14 June 2023 Admin talk contribs created page Linux iptables (Created page with "Among big topic of networking, iptables is incredibly versatile and widely used despite being replaced by nftables on Linux. Iptables works as a command-line firewall that filters packets according to the defined rules. With Iptables, users can accept, refuse, or onward connections. == Iptables glossary == * '''TARGET''': A target is an action you want Iptables to apply when a packet matches a rule. * '''CHAIN''': A chain is a list of rules; available built-in chains...") Tag: Visual edit
• 18:26, 9 June 2023 Admin talk contribs created page FQDN (Created page with "'''FQDN''' – A fully qualified domain name (FQDN) is the complete domain name for a specific computer, or host, on the internet or in your local area network. An example is ''mail.yourdomain.com'' Category: Terminology") Tag: Visual edit: Switched
• 10:05, 30 May 2023 Admin talk contribs uploaded File:Samsung PM9A3 specificatio.png
• 10:05, 30 May 2023 Admin talk contribs created page File:Samsung PM9A3 specificatio.png
• 17:11, 29 May 2023 Admin talk contribs created page BIOS vs UEFI (Created page with "UEFI and BIOS are used to boot computer system. Although UEFI is a newer software solution, it is not always necessary to use UEFI. Some mother board provides led or bottom-right corner on monitor to display boot code status {| class="wikitable" ! !BIOS ('''B'''asic '''I'''nput/'''O'''utput '''S'''ystem) |UEFI ('''U'''nified '''E'''xtensible '''F'''irmware '''I'''nterface)<ref>https://en.wikipedia.org/wiki/UEFI</ref> |- |'''Release Date''' |1975. |2002...") Tag: Visual edit
• 17:08, 29 May 2023 Admin talk contribs moved page BIOS code to AMI Boot code
• 16:06, 29 May 2023 Admin talk contribs created page BIOS code (Created page with "== Typical AMI bios code == Progress Codes 00 - Not used 01 - Power on. Reset type detection (soft/hard) 02 - AP initialization before microcode loading 03 - System Agent initialization before microcode loading 04 - PCH initialization before microcode loading 05 - OEM initialization before microcode loading 06 - Microcode loading 07 - AP initialization after microcode loading 08 - System Agent initialization after microcode loading 09 - PCH initialization after...") Tag: Visual edit
• 13:51, 27 May 2023 Admin talk contribs created page Network interface name (Created page with "The Linux kernel assigns names to network interfaces, nowaday there are multiple network interface naming scheme is available and each has pros and cons. == Simple scheme == <code>eth0</code>, <code>eth1</code>, etc were simply assigned by the kernel. There are many possible way to use this scheme, * . reboot with the kernel parameter <code>net.ifnames=0</code>, or made persistent by editing <code>/etc/default/grub</code> and running <code>update-grub</code> * ove...") Tag: Visual edit
• 11:33, 27 May 2023 Admin talk contribs uploaded File:Tap tun veth.png
• 11:33, 27 May 2023 Admin talk contribs created page File:Tap tun veth.png
• 11:33, 27 May 2023 Admin talk contribs uploaded File:Https---www.packetcoders.io-content-images-2020-10-image1.png.png
• 11:33, 27 May 2023 Admin talk contribs created page File:Https---www.packetcoders.io-content-images-2020-10-image1.png.png
• 11:30, 27 May 2023 Admin talk contribs created page Virtual Networking Devices (Created page with "In physical world, computer systems typically consist of one or more physical network adapter something like ethx, enox. however, in virtual networking world, '''TUN, TAP''' and '''veth Pairs are used for VMs for network connectivity.''' TUN/TAP/VETH makes a virtual network interface on host then we can assign an IP to it, analyze the traffic, route traffic to it etc. File:Packetcoders.io.image.png|center|thumb|813x813px|Ref-https://www.packetcoders.io/content/images...") Tag: Visual edit
• 11:29, 27 May 2023 Admin talk contribs uploaded File:Packetcoders.io.image.png
• 11:29, 27 May 2023 Admin talk contribs created page File:Packetcoders.io.image.png
• 13:50, 26 May 2023 Admin talk contribs created page A malware on GPU server (Created page with "My team does not realize a malware in our system, we just assumed someone is working hard on the shared GPU system. Because we are not frequently checking host resource due to container or web interface oriented working process. however, it turns out one of Coinminer<ref>https://en.wikipedia.org/wiki/Cryptojacking</ref>- Multios.Coinminer.Miner - live in hiding on the system. This page describes how to handle this malware to help someone's time for the similar situation...") Tag: Visual edit
• 12:45, 26 May 2023 Admin talk contribs uploaded File:Malware name.png
• 12:45, 26 May 2023 Admin talk contribs created page File:Malware name.png
• 12:40, 26 May 2023 Admin talk contribs uploaded File:Malware 100CPU.png
• 12:40, 26 May 2023 Admin talk contribs created page File:Malware 100CPU.png
• 17:32, 25 May 2023 Admin talk contribs created page Docker library sharing from host to container (Created page with "From Docker and micro service point of view, the best practices of Docker are to package the library into the image, and not rely on a library file being present on the host. however, sometime sharing host library to container would be helpful to reduce redundancy and reduce size of Docker images. One of example would be CUDA tool kit, for example, install various version of CUDA toolkit on host and volume mouting when container start with read only. this method will...") Tag: Visual edit
• 17:02, 25 May 2023 Admin talk contribs created page Docker command workflow (Created page with "Following slide show a high level Docker commands from Dockerfile to Dockerhub or private Dockerhub. {| class="wikitable" |+ !commands !State from !State to !Example !Notes |- |build/compose |Dockerfile or compose file |docker image |build docker image from source | |- |run |docker image |docker container |execute image as container | |- |commit |docker container |docker image |apply change in container to image | |- |stop/start/restart |docker container |docker contain...") Tag: Visual edit
• 16:56, 25 May 2023 Admin talk contribs uploaded File:Docker file2hub2.png
• 16:56, 25 May 2023 Admin talk contribs created page File:Docker file2hub2.png
• 16:47, 25 May 2023 Admin talk contribs uploaded File:Docker file2hub.png
• 16:47, 25 May 2023 Admin talk contribs created page File:Docker file2hub.png
• 16:39, 25 May 2023 Admin talk contribs uploaded File:Docker image2hub.png
• 16:39, 25 May 2023 Admin talk contribs created page File:Docker image2hub.png
• 16:32, 25 May 2023 Admin talk contribs uploaded File:Dockercli work flow.png
• 16:32, 25 May 2023 Admin talk contribs created page File:Dockercli work flow.png
• 14:59, 25 May 2023 Admin talk contribs created page Linux file permission (Created page with "== Traditional file permission == ls command witl -al option to view the permissions (or '''file mode''') set for the contents of a directory<syntaxhighlight lang="bash"> $ ls -al / total 2098648 drwxr-xr-x 20 root root 4096 May 25 08:40 . drwxr-xr-x 20 root root 4096 May 25 08:40 .. lrwxrwxrwx 1 root root 7 Aug 31 2022 bin -> usr/bin drwxr-xr-x 4 root root 4096 May 25 09:40 boot drwxr-xr-x 20 ro...") Tag: Visual edit
• 13:02, 24 May 2023 Admin talk contribs created page Pip tips and tricks (Created page with "== WARNING: Running pip as the 'root' user == This was introduced in pip <code>21.1</code> as a "bug fix" as of pip 22.1<ref>https://stackoverflow.com/questions/68673221/warning-running-pip-as-the-root-user</ref> <syntaxhighlight lang="bash"> #you can now opt out of the warning using a parameter: $sudo pip install --root-user-action=ignore <packages> # You can ignore this in your container by using the environment: ENV PIP_ROOT_USER_ACTION=ignore </syntaxhighlight> ==...") Tag: Visual edit
• 09:42, 24 May 2023 Admin talk contribs created page Conda tips and tricks (Created page with " == Downgrading Conda Version == <syntaxhighlight lang="bash"> conda config --set allow_conda_downgrades true conda install conda=a.b.c # version you want to install </syntaxhighlight> == Manage Conda Channel == {| class="wikitable" |+ !Commands !Description !Notes |- |<code>conda config --add channels conda-forge</code> |Add conda channel | |- |<code>conda config --set channel_priority strict</code> |Set channel priority policy | |- |<code>conda config --show-sourc...") Tag: Visual edit
• 10:53, 22 May 2023 Admin talk contribs created page MLPerf (Created page with "[https://mlcommons.org/en/ MLPerf] is a consortium of key contributors from the AI/ML (Artificial Intelligence and Machine Learning) community that provides unbiased AI/ML performance evaluations of hardware, software, and services. == References ==") Tag: Visual edit
• 09:26, 22 May 2023 Admin talk contribs uploaded File:Nvidia-mig-example.png
• 09:26, 22 May 2023 Admin talk contribs created page File:Nvidia-mig-example.png
• 09:03, 22 May 2023 Admin talk contribs created page MIG (Created page with "== NVIDIA Multi-Instance GPU == NVIDIA introduced MIG(Multi-Instance GPU) since Ampere architecture. MIG feature allows GPUs to be securely partitioned into up to seven separate GPU Instances for CUDA applications, so that multiple users use the same physical GPU with separate resources for optimal GPU utilization. <ref>https://docs.nvidia.com/datacenter/tesla/mig-user-guide/</ref> MIG ensures to providing each instance's processors have separate and isolated paths th...") Tag: Visual edit
• 18:23, 21 May 2023 Admin talk contribs created page Power Supply Ratings (Created page with " Power Supply Unit (PSU) ratings, specifications, and efficiency levels based on load. Higher efficiency ratings result in less power loss, reduced heat generation, and lower energy consumption. The specific efficiency levels may vary slightly depending on the manufacturer and model of the power supply {| class="wikitable sortable" !Rating !Specification !Efficiency by Load |- |80 PLUS |Specifies efficiency at different loads |Varies by certification level (80 PLUS Br...") Tag: Visual edit
• 17:59, 20 May 2023 Admin talk contribs created page Private:UCM (Created page with "== UCM menu control == {| class="wikitable" !Plugin !Menu !Menu Options !Script action !Notes !Ref |- |Diskless |PXE enable / disable | |dhcp-ignore=bootp |stop any replies to BOOTP, no messing with client-ids<ref>https://dnsmasq-discuss.thekelleys.org.narkive.com/D56pRrTi/how-to-disable-bootp-and-all-pxe-boot-in-dnsamsq</ref> |Private:DnsmasqPrivate:Diskless |- | | | | | | |- | | | | | | |}") Tag: Visual edit
• 17:51, 20 May 2023 Admin talk contribs moved page Private:Syslinux to Private:Diskless
• 17:34, 20 May 2023 Admin talk contribs created page BOOTP (Created page with "BOOTP (Bootstrap Protocol) is an internet protocol that lets a network user automatically be configured to receive an IP address and have an operating system booted without user involvement. BOOTP is executed using User Datagram Protocol (UDP) and is the basis for Dynamic Host Configuration Protocol (DHCP). DHCP servers are used to receive client requests. * BOOTP is the successor of RARP. The problem with RARP is that it only works within a broadcast domain and only...") Tag: Visual edit
• 17:09, 20 May 2023 Admin talk contribs created page Internet protocols (Created page with " == List of Protocols == {| class="wikitable sortable" !Protocol !Port !Description |- |HTTP |80 |Hypertext Transfer Protocol |- |HTTPS |443 |HTTP over TLS/SSL encryption |- |FTP |21 |File Transfer Protocol |- |SSH |22 |Secure Shell |- |Telnet |23 |Remote terminal access |- |SMTP |25 |Simple Mail Transfer Protocol |- |DNS |53 |Domain Name System |- |DHCP |67/68 |Dynamic Host Configuration Protocol |- |TFTP |69 |Trivial File Transfer Protocol |- |SNMP |161 |Simple Network...") Tag: Visual edit
• 16:18, 20 May 2023 Admin talk contribs created page Manual:UCM (Created page with "== UCM (Universal Cluster Management) == == Reference == <references />") Tag: Visual edit
• 16:14, 20 May 2023 Admin talk contribs moved page Linux to Linux Process
• 15:52, 20 May 2023 Admin talk contribs moved page Manual:DLSssh to Manual:HMSSH