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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).

20:35, 15 September 2024 Ardika Sulistija talk contribs created page Tailscale (Created page with "[https://tailscale.com/blog/how-tailscale-works| How Tailscale Works]")
14:39, 11 September 2024 Ardika Sulistija talk contribs created page Zombie Process (Created page with " 550px|center|class=img-responsive Related topics: * Processes * Orphan Process * Process Control Block (PCB) * Threads ---- ====What is a Zombie Process==== ---- A zombie (Z) process whose execution is completed but it still has an entry in the process table. Zombie processes usually occur for child processes, as the parent p...")
14:39, 11 September 2024 Ardika Sulistija talk contribs created page Yum, Apt, and Repos (Created page with "For dnf stuff, go to the Dnf page ===Yum=== Yum Cheatsheet: https://access.redhat.com/sites/default/files/attachments/rh_yum_cheatsheet_1214_jcs_print-1.pdf 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 * The configuration file for yum and related utilities is located at /etc/yum.conf</b...")
14:38, 11 September 2024 Ardika Sulistija talk contribs created page Xrdp (Created page with " xrdp - A remote desktop protocol (RDP) server. ---- ====Install a GUI and XRDP on Ubuntu 20.04==== ---- https://linuxize.com/post/how-to-install-xrdp-on-ubuntu-20-04/ ====Install a GUI and XRDP on Ubuntu 16 or Ubuntu 18==== ---- https://linuxize.com/post/how-to-install-xrdp-on-ubuntu-18-04/ You can use the steps in this article to install XFCE4 desktop GUI and Xrdp. Once setup, customers can use RDP clients, (such as Microsoft Remote Desktop), to access t...")
14:38, 11 September 2024 Ardika Sulistija talk contribs created page WordPress (Created page with " ==== Download and Configure WordPress (and mysql/mariadb) ==== ---- Download WordPress, extract, and change ownership of Files so Apache can access them: wget -c http://wordpress.org/latest.tar.gz tar -xzvf latest.tar.gz chown -R apache:apache /var/www/html/wordpress Assuming you have mysql/mariadb installed, login to mysql to configure it: mysql -u root -p Configure DB: CREATE DATABASE wordpress_db; GRANT ALL PRIVILEGES ON wordpress_db.* TO 'wordpress_user...")
14:38, 11 September 2024 Ardika Sulistija talk contribs created page Wireshark (Created page with "Useful tutorial article: https://www.varonis.com/blog/how-to-use-wireshark ====Install Wireshark on RHEL8.8 with GUI==== ---- In RHEL8.8, if you install wireshark using dzdo yum install wireshark you will see that you will not be able to open it as you will get the error: wireshark: error while loading shared libraries: libQt5PrintSupport.so.5: cannot oopen shared object file: No such file or directory To identify what packages provides libQt5PrintSupport...")
14:38, 11 September 2024 Ardika Sulistija talk contribs created page Windows (Created page with "====How to quickly generate a large file in Windows==== ---- Ref: https://tweaks.com/windows/62755/quickly-generate-large-test-files-in-windows/ Never download another 100mb test file or waste time searching for a large file. Sometimes you need a large file fast to test data transfers or disk performance. Windows includes a utility that allows you to quickly generate a file of any size instantly. Open an administrative level command prompt. Run the following comma...")
14:37, 11 September 2024 Ardika Sulistija talk contribs created page Whois (Created page with "https://www.2daygeek.com/whois-check-domain-ip-address-information-lookup-linux/")
14:37, 11 September 2024 Ardika Sulistija talk contribs created page Whoami (Created page with "https://www.thegeekstuff.com/2009/03/4-ways-to-identify-who-is-logged-in-on-your-linux-system/ whoami command is used to print the loggedin user name. $ whoami john whoami gives the same output as id -un as shown below: $ id -un john whoami command will display the logged-in user name and current tty details. The output of this command contains the following columns: logged-in user name, tty name, current time with date and ip-address...")
14:37, 11 September 2024 Ardika Sulistija talk contribs created page Who (Created page with "https://www.thegeekstuff.com/2009/03/4-ways-to-identify-who-is-logged-in-on-your-linux-system/ who command is used to get the list of the usernames who are currently logged in. Output of the who command contains the following columns: user name, tty number, date and time, machine address. $ who ramesh pts/0 2009-03-28 22:57 (dev-db-server) jason pts/1 2009-03-28 23:01 (dev-db-server) john pts/2 2009-03-28 23:04 (dev-db-server) To get...")
14:37, 11 September 2024 Ardika Sulistija talk contribs created page Waterfall Chart (Created page with "You can test here: https://www.webpagetest.org/ Or you can simply look at your browser network data (inspect elements) How to read a waterfall chart: https://nooshu.github.io/blog/2019/10/02/how-to-read-a-wpt-waterfall-chart/")
14:36, 11 September 2024 Ardika Sulistija talk contribs created page W (Created page with "w - Show who is logged on and what they are doing. https://www.thegeekstuff.com/2009/03/4-ways-to-identify-who-is-logged-in-on-your-linux-system/ w command is used to show logged-in user names and what they are doing. The information will be read from /var/run/utmp file. The output of the w command contains the following columns: Name of the user User’s machine number or tty number Remote machine address User’s Login time Idle time (not usable time) Time u...")
14:36, 11 September 2024 Ardika Sulistija talk contribs created page Vmstat (Created page with "Add notes: https://www.linode.com/docs/guides/use-vmstat-to-monitor-system-performance/ Add, by default it shows in Kilobytes!!! vmstat - Report virtual memory statistics. $ vmstat procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu----- r b swpd free buff cache si so bi bo in cs us sy id wa st 0 0 0 272904 0 235736 0 0 1 3 12 22 0 0 100 0 0 $ vmstat 1 5 procs -----...")
14:36, 11 September 2024 Ardika Sulistija talk contribs created page Vimdiff (Created page with "====Comparing two files==== ---- vimdiff file1 file2 vim -d file1 file2")
14:36, 11 September 2024 Ardika Sulistija talk contribs created page Vim (Created page with " vim - Vi IMproved, a programmers text editor. Vim Cheatsheet: https://devhints.io/vim Go - end of file, new line. ---- Vim shortcut keys: ":" (shift + ;), Brings up the vim command line esc To get out of the command line thing. "i" Insert mode "a" Append after cursor position "r" Replace letter...")
14:35, 11 September 2024 Ardika Sulistija talk contribs created page VPC Endpoints (Created page with "center|class=img-responsive")
14:35, 11 September 2024 Ardika Sulistija talk contribs created page Users (Created page with "https://www.thegeekstuff.com/2009/03/4-ways-to-identify-who-is-logged-in-on-your-linux-system/ users command is used to print the user name who are all currently logged in the current host. It is one of the command don’t have any option other than help and version. If the user using, ‘n’ number of terminals, the user name will shown in ‘n’ number of time in the output. $ users john jason ramesh")
14:35, 11 September 2024 Ardika Sulistija talk contribs created page Upstart and SysVinit (Created page with "/etc/init is where the upstart init configs live. While they are not scripts themselves, they essentially execute whatever is required to replace sysvinit scripts. Short story: /etc/init/name.conf will get picked up. It will be used automatically as their 'start on' stanzas control and/or manually by you. And it will put a log in /var/log/upstart/name.log In Red Hat Enterprise Linux 6, init from the sysvinit package has been replaced with Upstart...")
14:35, 11 September 2024 Ardika Sulistija talk contribs created page Umask (Created page with "https://www.cyberciti.biz/tips/understanding-linux-unix-umask-value-usage.html")
14:34, 11 September 2024 Ardika Sulistija talk contribs created page Ulimit (Created page with "ulimit is a built-in Linux shell command that allows you to view or configure system resource amount limits that individual users consume. Limiting resource usage is valuable in environments with multiple users and system performance issues. https://phoenixnap.com/kb/ulimit-linux-command # ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f...")
14:34, 11 September 2024 Ardika Sulistija talk contribs created page Ufw (Created page with "ufw - Uncomplicated Firewall https://wiki.ubuntu.com/UncomplicatedFirewall The following are some examples of how to use ufw: https://ubuntu.com/server/docs/security-firewall The ufw application is capable of doing anything that iptables can do. This is achieved by using several sets of rules files, which are nothing more than iptables-restore compatible text files. Fine-tuning ufw and/or adding additional iptables commands not offered via the ufw command is...")
14:34, 11 September 2024 Ardika Sulistija talk contribs created page Udev (Created page with "Read more: https://dev.to/enbis/how-udev-rules-can-help-us-to-recognize-a-usb-to-serial-device-over-dev-tty-interface-pbk Udev is the mechanism used to create and name /dev device nodes corresponding to the devices that are present in the system. Udev uses matching information provided by sysfs with rules provided by the user to dynamically add the required device nodes. Udev rule files are kept in the /etc/udev/rules.d/ directory. I.e: $ cat /etc/udev/rules.d/70-per...")
14:34, 11 September 2024 Ardika Sulistija talk contribs created page Ubuntu (Created page with "==== How to upgrade Ubuntu linux kernel ==== ---- Update/upgrade kernel: $ sudo apt-get update && sudo apt-get upgrade $ sudo apt-get dist-upgrade $ sudo reboot If the reboot doesn't work and it is still booting to the old kernel, then follow steps 3+ in section "How to Change the Default Ubuntu Kernel on AWS" on this page. ==== How to perform a major release upgrade ==== ---- Ubuntu 14.04 LTS ------> Ubuntu 16.04 LTS ------> Ubuntu 18.04 LTS I tried r...")
14:33, 11 September 2024 Ardika Sulistija talk contribs created page Traceroute (Created page with "https://www.thegeekstuff.com/2012/05/traceroute-examples/ Good example from Anam: Traceroute in a loop: while true; do sudo traceroute <IP address>; sleep 2; echo "*****************"; done")
14:33, 11 September 2024 Ardika Sulistija talk contribs created page Top (Created page with " 'top' - display Linux processes. It is part of the procps package, a set of Linux utilities that provide system information. And other tools such as free, vmstat, ps, and more. Top gets most of its info from several files under the /proc directory. It pretty much summarizes most of them into one window. ====The Basics==== ---- CPU In accordance with the USE method, I'm going to split this up based on the different resources, starting w...")
14:33, 11 September 2024 Ardika Sulistija talk contribs created page Tmux (Created page with "====Use Tmux to scroll up and down a long output==== ---- If you have a long output of something and you want to be able to view the whole output by scrolling, you can use tmux by running: # ctrl + b, then [ # Then Q to quit scroll mode")
14:33, 11 September 2024 Ardika Sulistija talk contribs created page Timedatectl (Created page with "https://www.howtogeek.com/782032/how-to-use-the-timedatectl-command-on-linux/")
14:33, 11 September 2024 Ardika Sulistija talk contribs created page Threads (Created page with "Related topics: * Processes * Zombie Process * Orphan Process * Process Control Block (PCB) ---- Threads are the smallest unit of processing that a scheduler can work, and can have the same resources such as memory, address space, open files. Also called "light weight processes (LWPs). Threads vs Processes: * Threads...")
14:32, 11 September 2024 Ardika Sulistija talk contribs created page Test-NetConnection (Created page with "For Windows PS C:\windows\system32> test-NetConnection 172.18.12.43 -port 22 ComputerName : 172.18.12.43 RemoteAddress : 172.18.12.43 RemotePort : 22 InterfaceAlias : Ethernet 3 SourceAddress : 172.24.113.86 TcpTestSucceeded : True")
14:32, 11 September 2024 Ardika Sulistija talk contribs created page Terraform (Created page with "My Terraform Notes: https://docs.google.com/document/d/15NuOrpV3ALFUAlvN8qVydKgcYYySfnLn/edit?usp=sharing&ouid=113385906598888138625&rtpof=true&sd=true")
14:31, 11 September 2024 Ardika Sulistija talk contribs created page Tenable (Created page with "====What is Tenable?==== ---- Ref: https://docs.tenable.com/nessus-agent/Content/GettingStarted.htm Tenable Nessus Agents are lightweight, low-footprint programs that you install locally on hosts to supplement traditional network-based scanning or to provide visibility into gaps that traditional scanning misses. Tenable Nessus Agents collect vulnerability, compliance, and system data, and report that information back to a manager for analysis. With Tenable Nessu...")
14:31, 11 September 2024 Ardika Sulistija talk contribs created page Telnet (Created page with " telnet -- user interface to the TELNET protocol. Useful to do a quick connection test to a remote server on a specific port. (Nmap might be more useful at times) ====How to use Telnet==== ---- To test is port 22 (SSH) is open on a remote server: $ telnet 34.195.120.102 22 Trying 34.195.120.102... Connected to 34.195.120.102. Escape character is '^]'. SSH-2.0-OpenSSH_7.4 To escape, hit ctrl + ]. You will get dropped down to th...")
14:31, 11 September 2024 Ardika Sulistija talk contribs created page Tee (Created page with "https://askubuntu.com/questions/103643/cannot-echo-hello-x-txt-even-with-sudo If you have to write to a file in a script using sudo like sudo echo "word" > file won't work because the redirection is done by the shell before sudo is even started. So make sure the redirection happens in a shell with the right permissions by using tee, like so: echo "blacklist nouveau" | sudo tee /etc/modprobe.d/denylist.conf Use -a to append: echo "options nouveau...")
14:29, 11 September 2024 Ardika Sulistija talk contribs created page Tcpdump (Created page with " * TCP Add notes: https://packetlife.net/blog/2010/jun/7/understanding-tcp-sequence-acknowledgment-numbers/ ------ UNDER CONSTRUCTION, PLEASE VISIT BACK SOON. https://support.rackspace.com/how-to/capturing-packets-with-tcpdump/ https://linux.die.net/man/8/tcpdump https://opensource.com/article/18/10/introduction-tcpdump https://www.thegeekdiary.com/examples-of-using-tcpdump-command-for-network-troubleshooting/ This one How to use tcpdump for ca...")
14:29, 11 September 2024 Ardika Sulistija talk contribs created page Tainted Kernels (Created page with "* Module verification failed - signature and/or required key missing - tainting kernel (Red Hat) https://access.redhat.com/solutions/3484741 * <module_name>: module verification failed: signature and/or required key missing - tainting kernel (Red Hat) https://access.redhat.com/solutions/800133 * What is a tainted kernel in Linux? https://unix.stackexchange.com/questions/118116/what-is-a-tainted-kernel-in-linux * Tainted kernels https://www.kernel.org/doc/html/late...")
14:29, 11 September 2024 Ardika Sulistija talk contribs created page TCP (Created page with "https://www.geeksforgeeks.org/tcp-connection-termination/ https://packetlife.net/blog/2010/jun/7/understanding-tcp-sequence-acknowledgment-numbers/ sliding window, three way handshake PAGE UNDER CONSTRUCTION!!! Add notes: https://docs.google.com/document/d/1QaI4mHGB5_tPimuyBVQRROpx5ErqumGSWZEa12dANXU/edit TCP header image; http://www.networksorcery.com/enp/protocol/tcp.htm ===TCP/IP Model=== ---- TCP/IP Model - Transmission Control Protocol/Internet Protoco...")
14:28, 11 September 2024 Ardika Sulistija talk contribs created page Systemd (Created page with "==== Making Changes to Systemd unit files/configuration ==== ---- When you have made changes to the unit file of a service on the filesystem. In order for the service to use that new configuration, we need to tell the service to reload its configuration file. So run systemctl reload <service>, to tell the service to dump the current configuration you are using and RELOAD its configuration from the filesystem into memory, and now it would use that newly modified v...")
14:28, 11 September 2024 Ardika Sulistija talk contribs created page Sysstat (Created page with "Add SAR notes here. https://www.thegeekdiary.com/how-to-view-past-performance-with-sar-in-linux/ By default, sar stats are collected every 10 minutes. The data is collected using a simple cron job configured within /etc/cron.d/sysstat. This job can be amended to collect the data as frequently as you require. Example /etc/cron.d/sysstat file is provided below. # cat /etc/cron.d/sysstat # Run system activity accounting tool every 10 minutes */10 * * * * root /usr...")
14:28, 11 September 2024 Ardika Sulistija talk contribs created page Subaru (Created page with "center|class=img-responsive * Oil Filter: 15208AA12A * Oil: 5w-30 * Changing the oil and oil filter: 4.5 US qt (4.3 liters, 3.8 Imp qt) * Cabin Air Filter: 72880FJ000 * Engine Air Cleaner Element: 16546AA180 * [https://static.oemdtc.com/OwnerManual/MSA5M2005A.pdf Owner's Manual] * [https://docs.google.com/spreadsheets/d/1GwGuTHZGoA_LwRzqZ449osxSmVT08P36/edit#gid=1485007918 Maintenance Logs] {| class...")
14:28, 11 September 2024 Ardika Sulistija talk contribs created page Strace (Created page with "https://www.tecmint.com/strace-commands-for-troubleshooting-and-debugging-linux/ ====How to run strace and output to a file==== ---- Example: sudo strace -f -o strace.txt sudo python ./installer_linux.py -t <token> --no-prompt")
14:28, 11 September 2024 Ardika Sulistija talk contribs created page Splunk (Created page with "the key command you will want to use to set up a universal forwarder to be a clean template on an VM image would be: /opt/splunkforwarder/bin/splunk clone-prep-clear-config There is also a seed.conf file that can be used.")
14:27, 11 September 2024 Ardika Sulistija talk contribs created page Split (Created page with "THIS PAGE IS UNDER CONSTRUCTION, PLEASE VISIT BACK SOON")
14:27, 11 September 2024 Ardika Sulistija talk contribs created page Sosreport (Created page with "Add notes here Very useful! https://access.redhat.com/solutions/3592 https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/pdf/generating_sos_reports_for_technical_support/red_hat_enterprise_linux-8-generating_sos_reports_for_technical_support-en-us.pdf ==== How to get sosreport on AL2 ===== - https://github.com/sosreport/sos/issues/1563 Which mentions GitHub repo for sos-amazon-linux: - https://github.com/TurboTurtle/sos/tree/amazon-linux And t...")
14:27, 11 September 2024 Ardika Sulistija talk contribs created page Sed (Created page with "ADD NOTES: https://stackoverflow.com/questions/29399790/comment-out-lines-in-fstab-with-bash-script https://www.bitdoze.com/sed-insert-append-text/#appending-text-with-sed You can use sed to print out specific lines of a file. I'm sure there's more you can do with sed but this is what I have for now. How to remove a line that contains a string like "aws-replication" from a file: # grep -i aws-replication test disk:x:6:aws-replication aws-replication:x:1001:...")
14:27, 11 September 2024 Ardika Sulistija talk contribs created page SUSE Linux (Created page with "====SUSE Public Cloud Infrastructure Update==== ---- SUSE has recently made changes to their Public Cloud Update Infrastructure starting June 1, 2020, which is known to cause issues when trying to reach the SUSE repositories as the repositories were no longer present. SUSE has shifted from IP based restrictions to Instance billing code-based restrictions. Per SUSE's official documentation [1], the instances must upgrade the package "cloud-regionsrv-client" to ve...")
14:26, 11 September 2024 Ardika Sulistija talk contribs created page SSM (Created page with " ====Run Command Troubleshooting Checklist==== ---- * Verify if the instance is online (SSM agent pre-requisites). Is the Agent up to date? * Verify if SSM document supports the type of instance you want to target (Windows and Linux) * Ask for command ID and verify the status in SSM K2 page from SSM dashboard or from Admiral page. * Check the logs and the stdout location: ** The agent also stores the script (_script.ps1) and outputs (stderr and stdout) in the worker (<...")
14:26, 11 September 2024 Ardika Sulistija talk contribs created page SSL / TLS (Created page with "ADD NOTES: What Happens in a TLS Handshake?: https://www.cloudflare.com/learning/ssl/what-happens-in-a-tls-handshake/ Good Video: https://www.youtube.com/watch?v=T4Df5_cojAs ====What is SSL?==== ---- How Does SSL Work?: https://www.cloudflare.com/learning/ssl/how-does-ssl-work/ SSL stands for Secure Sockets Layer. A protocol for encrypting and securing communications that take place on the Internet. SSL was replaced...")
14:26, 11 September 2024 Ardika Sulistija talk contribs created page SSH (Created page with " ssh — SSH stands for Secure Shell. OpenSSH SSH client (remote login program). The SSH protocol uses encryption to secure the connection between a client and a server. All user authentication, commands, output, and file transfers are encrypted to protect against attacks in the network. Uses for SSH protocol: * Providing secure access for users and automated processes. * Interactive and automated file transfers * Issuing remote commands...")
14:26, 11 September 2024 Ardika Sulistija talk contribs created page SS (Created page with "https://www.rootusers.com/21-ss-command-examples-in-linux/")
14:25, 11 September 2024 Ardika Sulistija talk contribs created page SFTP (Created page with " SFTP - Secure File Transfer Protocol ---- To open an SFTP connection to a remote system, use the sftp command followed by the remote server username and the IP address or domain name: sftp remote_username@server_ip_or_hostname Once connected, you will be presented with the sftp prompt, and you can start interacting with the remote machine: # To 'get' Download file usin SFTP from remote server to your local machine. sftp> get [file] # To 'put Upload f...")