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Combined display of all available logs of DikapediaV2. You can narrow down the view by selecting a log type, the username (case-sensitive), or the affected page (also case-sensitive).

00:12, 27 August 2024 Ardika Sulistija talk contribs created page ElastiCache (Created page with "====How to install Redis-cli==== ---- How to install Redis-cli on Amazon Linux 2: $ sudo yum -y install openssl-devel gcc $ wget http://download.redis.io/redis-stable.tar.gz $ tar xvzf redis-stable.tar.gz $ cd redis-stable $ make distclean $ make redis-cli BUILD_TLS=yes $ sudo install -m 755 src/redis-cli /usr/local/bin/ ==== Is there downtime when changing node type? (scaling up)==== ---- Reference: [1] Cluster mode disabled https://docs.aws.amazon...")
00:10, 27 August 2024 Ardika Sulistija talk contribs created page EFS (Created page with "EFS - Elastic Filesystem ====Other methods besides DD==== ---- * How can I copy data to and from Amazon EFS in parallel to maximize performance on my EC2 instance? https://aws.amazon.com/premiumsupport/knowledge-center/efs-copy-data-in-parallel/ DD is not parallel, so there are other methods to create files much quicker than DD. Below is a process on how you can do so: 1) Create ten thousand small files in your local storage on your instance. $ mkdir /t...")
00:10, 27 August 2024 Ardika Sulistija talk contribs created page ECS (Created page with "ECS - Amazon Elastic Container Service https://docs.aws.amazon.com/AmazonECS/latest/developerguide/Welcome.html Related Topics: Docker, Docker Troubleshooting and CLI, ECR Really good blog post about how ECS manages CPU and memory resources: https://aws.amazon.com/blogs/containers/how-amazon-ecs-manages-cpu-and-memory-resources/ ====ECS Components==== ---- =====Cluster==...")
00:10, 27 August 2024 Ardika Sulistija talk contribs created page ECR (Created page with "* Docker * Docker Troubleshooting and CLI ---- ECR - Amazon Elastic Container Registry * A fully managed private docker container registry service that makes it easy to store, pull, and push docker images securely. * ECR automatically encrypts images at rest using S3 server-side encryption and transfers your container images over HTTPS. * ECR uses AWS S3 service in the back-end to host images in a Hig...")
00:09, 27 August 2024 Ardika Sulistija talk contribs created page EC2 (Created page with "the default user name for the AMI that you used to launch your instance: * For Amazon Linux 2 or the Amazon Linux AMI, the user name is ec2-user. * For a CentOS AMI, the user name is centos. * For a Debian AMI, the user name is admin. * For a Fedora AMI, the user name is ec2-user or fedora. * For a RHEL AMI, the user name is ec2-user or root. * For a SUSE AMI, the user...")
00:09, 27 August 2024 Ardika Sulistija talk contribs created page EBS (Created page with " ====How to list and delete EBS Snapshots in Bulk==== ---- How to list all EBS snapshots: https://aws.amazon.com/premiumsupport/knowledge-center/ebs-volume-snapshot-ec2-instance/ How to delete EBS snapshots in bulk: * This deletes all EBS snapshots created before 2020-07-28: $ for i in $(aws ec2 describe-snapshots --owner-ids self --query 'Snapshots[?StartTime<=`2020-07-28`].SnapshotId' --output text); do aws ec2 delete-snapshot --snapshot-id $i; sleep 5; done; * An...")
14:49, 21 August 2024 Ardika Sulistija talk contribs created page Du (Created page with " du - estimate file space usage. Summarizes disk usage of each FILE, recursively for directories. The two commands (df & du) reports their figures from different sources, and changes to the filesystems are not always considered in the same way. The disk free command (abbreviated to "df") is the standard Linux/Unix command used to display available disk space for the file systems. The "df" command uses the statvfs() system call and asks the file system for the c...")
14:49, 21 August 2024 Ardika Sulistija talk contribs created page Dracut (Created page with "In Red Hat Enterprise Linux (RHEL), dracut typically runs automatically when you install a new kernel. During the kernel installation process, dracut is invoked to create a new initial RAM filesystem (initramfs) image. This initramfs image is necessary for the system to boot with the new kernel, as it contains the drivers and modules required to mount the root filesystem and start the boot process. The new initramfs image is usually placed in the /boot directory alongsi...")
14:49, 21 August 2024 Ardika Sulistija talk contribs created page Dos2unix (Created page with " dos2unix - DOS/Mac to Unix and vice versa text file format converter. ----- Install: yum -y install dos2unix apt-get install dos2unix Convert Dos -> Unix dos2unix [file] Convert Unix -> Dos unix2dos [file]")
14:48, 21 August 2024 Ardika Sulistija talk contribs created page Docker Troubleshooting and CLI (Created page with "* Docker (Main page) * ECR ---- ====Common Docker CLI commands and troubleshooting concepts==== * The $ docker pull command allows you to download an image or set of images (i.e. repository). * The $ docker images command allows you to list the currently downloaded images. * The $ docker build command builds an image from a Dockerfile and a context. The build's context is processed...")
14:48, 21 August 2024 Ardika Sulistija talk contribs created page Docker (Created page with "* Docker Troubleshooting and CLI * ECR ====Containers vs Virtual Machines==== ---- center|class=img-responsive Virtual machines (VMs) are an abstraction of physical hardware turning one server into many servers. The hypervisor allows multiple VMs to run on a single machine. Each VM includes a full copy of an operating system, one or more apps, necessary binar...")
14:48, 21 August 2024 Ardika Sulistija talk contribs created page Dnf (Created page with "For Yum, Apt, and Repos stuff, refer to the Yum, Apt, and Repos page. ====Dnf==== ---- DNF is the modern successor to Yum, featuring improved speed, efficiency, and enhanced dependency resolution capabilities. More information: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/managing-software-packages_configuring-basic-system-settings#doc-wrapper")
14:48, 21 August 2024 Ardika Sulistija talk contribs created page Dmesg (Created page with "https://www.tecmint.com/dmesg-commands/ ====View Dmesg in Real-time==== ---- dmesg --follow")
14:47, 21 August 2024 Ardika Sulistija talk contribs created page Dig (Created page with "UNDER CONSTRUCTION, PLEASE VISIT BACK SOON. Add notes from gdrive https://stackpointer.io/internet/get-authoritative-dns-for-domain/435/ https://www.rootusers.com/12-dig-command-examples-to-query-dns-in-linux/")
14:47, 21 August 2024 Ardika Sulistija talk contribs created page Diff (Created page with "https://www.geeksforgeeks.org/diff-command-linux-examples/ sudo diff sosreport-A/ sosreport-B/ | grep differ sudo diff -qr sosreport-A/ sosreport-B/ | grep differ (this one better)")
14:47, 21 August 2024 Ardika Sulistija talk contribs created page Df (Created page with " df - DISK FREE; Report file system disk space. Df shows the available sizes on your disk partition. Tells you what percentage of the disk is occupied. Shows you what's mounted. ====How To Use Df==== ---- =====Basic Uses===== ---- df df -ah $ df -h Filesystem Size Used Avail Use% Mounted on devtmpfs 3.7G 0 3.7G 0% /dev tmpfs 3.7G 0 3.7G 0% /dev/shm tmpfs...")
14:47, 21 August 2024 Ardika Sulistija talk contribs created page Device Mapper Multipath (Created page with "====What is Device Mapper Multipathing?==== ---- What is Multipath? • Multipath is a storage network design technique that allows for fault tolerance or increased throughput by providing multiple concurrent physical connections (paths) from the storage to the individual host systems. multipathd and multipath internally use WWIDs to identify devices. WWIDs are also used as map names by default. ——— Device Mapper Multipathing (DM-Multipath) is a native multipat...")
14:46, 21 August 2024 Ardika Sulistija talk contribs created page Dd (Created page with " dd - convert and copy a file. REALLY GOOD ARTICLE: https://www.computernetworkingnotes.com/linux-tutorials/generate-or-create-a-large-text-file-in-linux.html ===How to use dd=== ---- This command will create a file of size count*bs, in which the below will create a file of 1 MB: dd if=/dev/zero of=file.txt count=1024 bs=1024 * /dev/zero is a special file in Unix-like operating systems that provides as many null characters as are read from i...")
14:46, 21 August 2024 Ardika Sulistija talk contribs created page DNS (Created page with "DNS (Domain Name Server) ====How I have my websites' DNS records set up==== ---- Before proceeding with the [https://dikapedia.com/wiki/SSL_/_TLS#How_to_install_Let.27s_Encrypt_with_Certbot_on_Amazon_Linux_2_.28Super_Easy.29 Let's Encrypt steps to configure SSL cert], I configured my DNS records with the following (on namecheap): * A record - @ - 23.20.238.64 * A record - www - 23.20.238.64 ====DNS==== ---- https://en.wikipedia.org/wiki/Domain_Name_System Good video...")
14:46, 21 August 2024 Ardika Sulistija talk contribs created page DHCP (Created page with " DHCP - DORA https://ipwithease.com/understanding-dora-process-in-dhcp/ ====dhclient==== ---- dchlient - the Dynamic Host Configuration Protocol (DHCP) Client used to allow a client to connect to a DHCP server. * You need this if you are not booting up using a static IP address!! dhclient configuration files: $ which dhclient /usr/sbin/dhclient # Another way of checking if dhclient is installed # Run as root $ dhclient status && dhclient --version...")
14:45, 21 August 2024 Ardika Sulistija talk contribs created page Curl (Created page with " curl - transfers a URL. Or make HTTP requests (or HTTPS, FTP, FTPS, SCP, SFTP, TFTP, DICT, TELENET, LDAP or FILE). https://www.thegeekstuff.com/2012/04/curl-examples/ ---- * Useful for testing web servers at the application level, testing an application's endpoint or connectivity, or checking if a service is healthy. * HTTP uses TCP so if curl works then TCP (and lower levels) must be working, too. Can be used in many different ways: * Designed to work wi...")
14:45, 21 August 2024 Ardika Sulistija talk contribs created page Cron (Created page with " crond - daemon to execute scheduled commands. crontab - Used to schedule repetitive tasks/commands. *must be root* Good info: * https://cronitor.io/cron-reference/5-places-cron-jobs-live * https://www.geeksforgeeks.org/crontab-in-linux-with-examples/ * https://crontab.guru/ * https://unix.stackexchange.com/questions/212703/crontab-error-no-crontab-for-use * https://serverfault.com/questions/449651/why-is-my-crontab-not-working-and-how-can-i-troubleshoo...")
14:44, 21 August 2024 Ardika Sulistija talk contribs created page Cp (Created page with "From cp manpage: -p same as --preserve=mode,ownership,timestamps --preserve[=ATTR_LIST] preserve the specified attributes (default: mode,ownership,timestamps), if possible additional attributes: context, links, xattr, all")
14:44, 21 August 2024 Ardika Sulistija talk contribs created page Core Dumps (Created page with "Terminology For Unix systems, the term "core dump" generally refers to a dump of the state of an individual process. The term "core dump" is also used in the context of NetWare, but in that context it refers to a dump of the state of a complete system. The equivalent of a NetWare core dump for Unix systems is typically called a "system crash dump" or "kernel crash dump". Core dump analysis Core dumps can be a valuable source of information in certain troubleshooting s...")
14:44, 21 August 2024 Ardika Sulistija talk contribs created page Context Switch (Created page with "Context Switching is when CPU switches to another process, the system must save the state of the old process and load the saved state for the new process via context switch. * Context-switch time is overhead; the system does no useful work while switching. The more complex the OS and the PCB --the longer the context switch. * Context switches are costly as it destroys the TLB buffer. A translation lookaside buffer (TLB)...")
14:43, 21 August 2024 Ardika Sulistija talk contribs created page CloudFormation (Created page with "====How to create Redis (cluster mode enabled) with 1 shard using YAML==== ---- CacheParameterGroupName is key to making it cluster mode enabled: AWSTemplateFormatVersion: 2010-09-09 Resources: myReplicationGroup: Type: AWS::ElastiCache::ReplicationGroup DeletionPolicy: Retain Properties: AtRestEncryptionEnabled: true AutomaticFailoverEnabled: true CacheParameterGroupName: 'default.redis5.0.clust...")
14:43, 21 August 2024 Ardika Sulistija talk contribs created page CloudEndure (Created page with "====CloudEndure log files==== ---- * Installation log file: ./cloudendure.log ** Generated during the agent installation process. ** Located in the directory from which the installation process was initiated. * Agent Logs: /var/lib/cloudendure/agent.log.0 ====How to start/stop the CloudEndure Agent==== ---- sudo /var/lib/cloudendure/runAgent.sh sudo /var/lib/cloudendure/stopAgent.sh * Note: stop / starting of the agent causes re-replicati...")
14:43, 21 August 2024 Ardika Sulistija talk contribs created page Cloud-Init and User-Data (Created page with "===Cloud-Init=== ---- add notes: https://cloudinit.readthedocs.io/en/latest/topics/dir_layout.html Cloud-init is the industry standard multi-distribution method for cross-platform cloud instance initialization. It is supported across all major public cloud providers, provisioning systems for private cloud infrastructure, and bare-metal installations. Cloud instances are initialized from a disk image and instance data: Cloud metadata User data (optional) Vendo...")
14:43, 21 August 2024 Ardika Sulistija talk contribs created page Chroot (Created page with "* Very important to bind /dev since the passwd command makes use of /dev/random which needs to actually exist Robert's way (This example shows how to change a password while chrooted): (all sudo) mount /dev/xvdf1 /mnt mount -o bind /proc /mnt/proc mount -o bind /sys /mnt/sys mount -o bind /dev /mnt/dev mount -o bind /run /mnt/run #This one was recommended but I didn't end up using it chroot /mnt passwd [username] exit umount /mnt/{dev,sys,proc} umo...")
14:42, 21 August 2024 Ardika Sulistija talk contribs created page Chrome (Created page with "Chrome Policy Template json file for Linux: https://gist.github.com/meets2tarun/2161e544f4c458c2f07641cafbdd186d")
14:42, 21 August 2024 Ardika Sulistija talk contribs created page Centrify/Delinea (Created page with "This is the Centrify for UNIX/Linux/Mac Command Line Cheat Sheet Ref: https://centrifying.blogspot.com/2016/02/centrify-for-unix-cli-cheat-sheet.html ====AD-bridging commands ("ad" commands)==== ---- adcheck - check OS, network and AD readiness for Centrify DirectControl To check the system with domain (e.g. corp.contoso.com) $ adcheck corp.contoso.com To only perform OS checks $ adcheck --test os To only perform network-related tests $ adcheck --test n...")
14:42, 21 August 2024 Ardika Sulistija talk contribs created page CPanel (Created page with "The cPanel & WHM Log Files https://docs.cpanel.net/knowledge-base/cpanel-product/the-cpanel-log-files/ ====File Manager==== ---- If you don't have direct access to the underlying server of the website but you have access to cPanel, you can use cPanel to access the website files (i.e. public_html, .htaccess (if it's apache), plugins, themes, wp-admin directory, etc.). #. Login to cPanel #. Go to File Manager. ====How to set Expires Headers for Your Site on cPanel=...")
13:56, 20 August 2024 Ardika Sulistija talk contribs created page Boot Process (Created page with " ==== Linux Boot Process ==== ---- Understanding the boot process will help you understand how the hardware and software is working together, and also will give you the required information to begin troubleshooting a booting problem you have. ====Main Stages (short version)==== ---- (sysVinit) BIOS -- Basic Input/Output System; executes MBR. * System starts BIOS located on flash memory. MBR -- Master Boot Record; executes GRUB. * MBR contains the...")
13:56, 20 August 2024 Ardika Sulistija talk contribs created page Bitnami (Created page with "List all of Bitnami's configuration files and scripts. ====Bitnami CTL script==== ---- Controls the stack (mysql, php-fpm, apache) $ sudo /opt/bitnami/ctlscript.sh start/restart/stop/status $ sudo /opt/bitnami/ctlscript.sh status apache already running mariadb already running php-fpm already running To restart individual services: $ sudo /opt/bitnami/ctlscript.sh restart php-fpm $ sudo /opt/bitnami/ctlscript.sh restart apache $ sudo /opt/bitnami/ctlscript.s...") Tag: Visual edit: Switched
13:32, 20 August 2024 Ardika Sulistija talk contribs created page Bastions (Created page with " A Bastion Host is a special purpose computer on a network specifically designed and configured to withstand attacks. * The bastion generally hosts a single application, for example a proxy server, and all other services are removed or limited to reduce the threat to the computer. * It is hardened in a manner primarily due to its location and purpose, which is either on the outside of a firewall or in a DMZ (demilitarized zone(public subnet)) and usually involve...")
13:31, 20 August 2024 Ardika Sulistija talk contribs created page Bash Scripting (Created page with " My fave cheatsheet site: https://devhints.io/bash How to commit scripts to GitHub: [http://dikapedia.com/wiki/index.php/Git Git] [https://github.com/ardikas/Shell-scripts Ardika's GitHub Repo] Add: netstat -plan | awk '/.*[0-9]+.[0-9]+.[0-9]+.[0-9].*/{gsub(/::ffff:/,"",$0);print $4"\t" $5}'|cut -sd. -f 1->netstat.log;echo "Netstat report";echo;echo "Number of Connections to each port:";cat netstat.log |awk {'print $1'}|cut -d: -f 2|sort|uniq -c|sort -nk 1|...")
05:42, 20 August 2024 Ardika Sulistija talk contribs created page Azure (Created page with "====Migrating Ubuntu from Azure to AWS ==== ---- [+] Useful links: https://ubuntu.com/aws https://ubuntu.com/blog/ubuntu-on-aws-gets-serious-performance-boost-with-aws-tuned-kernel https://packages.ubuntu.com/search?keywords=linux-aws https://launchpad.net/ubuntu/+source/linux-aws In order to run Ubuntu from Azure in AWS, the Azure kernel needs to be replaced with the 'generic' AWS turned Ubuntu kernel (linux-aws) either on the source o...")
05:41, 20 August 2024 Ardika Sulistija talk contribs created page AWS CLI (Created page with "====How to uninstall AWS CLI v1 (on AL2)==== ---- Uninstall aws cli v1: $ sudo yum remove awscli https://docs.aws.amazon.com/cli/v1/userguide/install-linux-al2017.html#install-amazon-linux-yum-uninstall ====How to install AWS CLI v2 (on AL2)==== ---- curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip" unzip awscliv2.zip sudo ./aws/install or another way: $ curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awsc...")
05:41, 20 August 2024 Ardika Sulistija talk contribs created page Auditd (Created page with "====What is Audit Daemon (auditd)?==== ---- auditd is the userspace component to the Linux Auditing System. It's responsible for writing audit records to the disk. Viewing the logs is done with the ausearch or aureport utilities. Configuring the audit system or loading rules is done with the auditctl utility. During startup, the rules in /etc/audit/audit.rules are read by auditctl and loaded into the kernel. Alternately, there is also an augenrules program that reads ru...")
05:41, 20 August 2024 Ardika Sulistija talk contribs created page Atop (Created page with "https://www.redhat.com/sysadmin/analyzing-linux-server-performance-atop Good article: https://haydenjames.io/use-atop-linux-server-performance-analysis/")
05:41, 20 August 2024 Ardika Sulistija talk contribs created page Archiving and Compression (Created page with " It is always good to have a backup. You can use the cp command, or you can archive it using tar and compress it using gzip, that way you will save some space. ====Archiving and Compression==== ---- This will archive and compress using gzip! Be sure to end in '.gz' and use -z, -z is for gzip: tar -zcvf [newArchiveName.tar.gz] [file/dir you want to archive] This will archive files and compressing using bzip2! Be sure to end name with '.bz2' and use -j. -j is for b...")
05:40, 20 August 2024 Ardika Sulistija talk contribs created page Apache (Created page with " ==== Apache Basics (old notes): ==== ---- To check Apache status: systemctl status httpd systemctl status apache2 service apache2 status # Ubuntu service httpd status To start, stop... Apache: systemctl start|stop|restart httpd service httpd start|stop|restart To auto start Apache upon boot up: systemctl enable httpd chkconfig httpd on ==== Virtual Hosts, Redirects, and SSL==== ---- Redirect examples that have worked for me using VirtualHost in the /e...")
05:40, 20 August 2024 Ardika Sulistija talk contribs created page Ansible (Created page with "Under construction")
05:40, 20 August 2024 Ardika Sulistija talk contribs created page AWS (General) (Created page with "* AWS IP ranges: https://docs.aws.amazon.com/general/latest/gr/aws-ip-ranges.html")
05:39, 20 August 2024 Ardika Sulistija talk contribs created page API (Created page with " ==== Application Programming Interface ==== ---- TL/DR: APIs just allow applications to communicate with each other. An API is a software intermediary that allows two apps to talk to each other. In other words: * An API is the messenger that delivers your request to the provider that you're requesting it from and then delivers the response back to you. * The way for an application to interact with certain system/application/library/etc. * Integrating lin...") Tag: Visual edit: Switched
04:53, 20 August 2024 Ardika Sulistija talk contribs deleted page Keep calm and sudo on! (content was: " center|275px|class=img-responsive ====Favorite External Links==== * [https://bash-prompt.net/ Bash Prompt - Linux Guides For Linux Users] ** [https://bash-prompt.net/guides/server-hacked/ How To Tell If Your Linux Server Has Been Compromised] * [https://devhints.io/ Rico's Cheatsheets - devhints] ** [...", and the only contributor was "Ardika Sulistija" (talk))
04:29, 20 August 2024 Ardika Sulistija talk contribs created page Keep Calm and Sudo On~ (Created page with " center|275px|class=img-responsive ====Favorite External Links==== * [https://bash-prompt.net/ Bash Prompt - Linux Guides For Linux Users] ** [https://bash-prompt.net/guides/server-hacked/ How To Tell If Your Linux Server Has Been Compromised] * [https://devhints.io/ Rico's Cheatsheets - devhints] ** [https://devhints.io/bash Bash scripting cheatsheet] * [https://tutorialsdojo.com/links-to-all-aws-cheat-sheets/ Tutorial...") Tag: Visual edit: Switched
03:30, 20 August 2024 Ardika Sulistija talk contribs created page MediaWiki:Tweeki-navbar-brand (Created page with "D I K A P E D I A V 2")
03:24, 20 August 2024 Ardika Sulistija talk contribs created page Keep calm and sudo on! (Created page with " center|275px|class=img-responsive ====Favorite External Links==== * [https://bash-prompt.net/ Bash Prompt - Linux Guides For Linux Users] ** [https://bash-prompt.net/guides/server-hacked/ How To Tell If Your Linux Server Has Been Compromised] * [https://devhints.io/ Rico's Cheatsheets - devhints] ** [https://devhints.io/bash Bash scripting cheatsheet] * [https://tutorialsdojo.com/links-to-all-aws-cheat-sheets/ Tutorial...") Tag: Visual edit: Switched
03:23, 20 August 2024 Ardika Sulistija talk contribs created page MediaWiki:Mainpage (Created page with "Keep calm and sudo on!")