Cronjob is a utility that schedules commands to run periodically at fixed times, dates, or intervals. It allows scheduling scripts, shell scripts, and commands to execute on a specific schedule. Cronjob syntax includes the timing, which has five fields for minute, hour, day of month, month, and day of week. Common cronjob expressions specify times like daily, weekly, monthly, and annually. The crontab command can be used to list, edit, and remove cronjobs for a user.
Computers are connected in a network to exchange information or resources with each other. Two or more computer are connected through network media called computer media.
There are a number of network devices or media that are involved to form computer network.
Computer loaded with Linux Operation System can also be a part of network whether it is a small or large network by multitasking and multi user natures.
Maintaining of system and network up and running is a task of System / Network Administrator’s job. In this article we are going to review frequently used network configuration and troubleshoot commands in Linux.
Introduction to users and groups in Linux. We will explore how to set user expiry information and force user password change after certain period of time. We will be also providing different permission to users and groups and restricting users and groups operations using sudoers file
What is Linux?
Command-line Interface, Shell & BASH
Popular commands
File Permissions and Owners
Installing programs
Piping and Scripting
Variables
Common applications in bioinformatics
Conclusion
This ppt gives information about:
1. Administering the server
2. Correcting installation problems
3. Setting up user accounts
4. Connecting to the network
5. Configuring utilities
Computers are connected in a network to exchange information or resources with each other. Two or more computer are connected through network media called computer media.
There are a number of network devices or media that are involved to form computer network.
Computer loaded with Linux Operation System can also be a part of network whether it is a small or large network by multitasking and multi user natures.
Maintaining of system and network up and running is a task of System / Network Administrator’s job. In this article we are going to review frequently used network configuration and troubleshoot commands in Linux.
Introduction to users and groups in Linux. We will explore how to set user expiry information and force user password change after certain period of time. We will be also providing different permission to users and groups and restricting users and groups operations using sudoers file
What is Linux?
Command-line Interface, Shell & BASH
Popular commands
File Permissions and Owners
Installing programs
Piping and Scripting
Variables
Common applications in bioinformatics
Conclusion
This ppt gives information about:
1. Administering the server
2. Correcting installation problems
3. Setting up user accounts
4. Connecting to the network
5. Configuring utilities
Samba is a popular freeware program that allows end users to access and use files, printers, and other commonly shared resources on a company's intranet or internet
Building a secure image pipeline with Ansible. Generating secure OS images for OpenShift Virtualization. Creating a immutable image pipeline with Ansible, OpenSCAP, Packer, Molecule and Vagrant. Packaging OS images for consumption to OpenShift Virtualization.
This Slide Pack contains the basics of Linux, what is linux, when it is created, what is opensource, some basic commands, the things you need to know about Linux.
Présentation aux Geeks Anonymes Liège par Cyril Soldani, le 13 décembre 2017.
Page des Geeks Anonymes : https://www.recherche.uliege.be/cms/c_9463913/fr/geeks-anonymes
Basic commands for powershell : Configuring Windows PowerShell and working wi...Hitesh Mohapatra
Configuring Windows PowerShell and working with basic commands
• Configuring the Windows PowerShell console
• Configuring the Windows PowerShell ISE application
• Finding commands
• Running commands
• Using the About files
[KubeCon EU 2022] Running containerd and k3s on macOSAkihiro Suda
https://sched.co/ytpi
It has been very hard to use Mac for developing containerized apps. A typical way is to use Docker for Mac, but it is not FLOSS. Another option is to install Docker and/or Kubernetes into VirtualBox, often via minikube, but it doesn't propagate localhost ports, and VirtualBox also doesn't support the ARM architecture. This session will show how to run containerd and k3s on macOS, using Lima and Rancher Desktop. Lima wraps QEMU in a simple CLI, with neat features for container users, such as filesystem sharing and automatic localhost port forwarding, as well as DNS and proxy propagation for enterprise networks. Rancher Desktop wraps Lima with k3s integration and GUI.
this is a presentation on scheduling algorithms of an operating system.
it also describes part of the psudo code.
basically this is all about the operating system and the basic processes
Samba is a popular freeware program that allows end users to access and use files, printers, and other commonly shared resources on a company's intranet or internet
Building a secure image pipeline with Ansible. Generating secure OS images for OpenShift Virtualization. Creating a immutable image pipeline with Ansible, OpenSCAP, Packer, Molecule and Vagrant. Packaging OS images for consumption to OpenShift Virtualization.
This Slide Pack contains the basics of Linux, what is linux, when it is created, what is opensource, some basic commands, the things you need to know about Linux.
Présentation aux Geeks Anonymes Liège par Cyril Soldani, le 13 décembre 2017.
Page des Geeks Anonymes : https://www.recherche.uliege.be/cms/c_9463913/fr/geeks-anonymes
Basic commands for powershell : Configuring Windows PowerShell and working wi...Hitesh Mohapatra
Configuring Windows PowerShell and working with basic commands
• Configuring the Windows PowerShell console
• Configuring the Windows PowerShell ISE application
• Finding commands
• Running commands
• Using the About files
[KubeCon EU 2022] Running containerd and k3s on macOSAkihiro Suda
https://sched.co/ytpi
It has been very hard to use Mac for developing containerized apps. A typical way is to use Docker for Mac, but it is not FLOSS. Another option is to install Docker and/or Kubernetes into VirtualBox, often via minikube, but it doesn't propagate localhost ports, and VirtualBox also doesn't support the ARM architecture. This session will show how to run containerd and k3s on macOS, using Lima and Rancher Desktop. Lima wraps QEMU in a simple CLI, with neat features for container users, such as filesystem sharing and automatic localhost port forwarding, as well as DNS and proxy propagation for enterprise networks. Rancher Desktop wraps Lima with k3s integration and GUI.
this is a presentation on scheduling algorithms of an operating system.
it also describes part of the psudo code.
basically this is all about the operating system and the basic processes
This talk is a followup to State of systemd @ Facebook that was presented last year. We'll cover the latest developments, how we're leveraging new systemd features, the design of our CI/CD pipeline for systemd, and finally discuss a number of interesting case studies.
2AM. We sleeping well. And our mobile ringing and ringing. Message: DISASTER! In this session (on slides) we are NOT talk about potential disaster (such BCM); we talk about: What happened NOW? Which tasks should have been finished BEFORE. Is virtual or physical SQL matter? We talk about systems, databases, peoples, encryption, passwords, certificates and users. In this session (on few demos) I'll show which part of our SQL Server Environment are critical and how to be prepared to disaster. In some documents I'll show You how to be BEST prepared.
IBM Connect 2016 - 60+ in 60 - Admin Tips Power HourChris Miller
See the full slides at http://idonot.es/60in60for2016
With a guaranteed minimum of 60 administration tips in 60 minutes you will walk out with a list of items to immediately help you tune your collaboration environment. Covering IBM Domino, Sametime, Connections, Traveler and more will have you eager to get back and implement some of the ideas. We will take best practices from the my SocialBizUg Admin Tips newsletter, customer case stories and other best practices. Have no fear, we will move faster that you can write so everything will be available for you to download. This is an ode to the hundreds of tips brought to you by the letters M and G (Mooney and Gab) over the years.
This talk will focus on the migration of the Facebook fleet to CentOS 7 and its adoption of systemd in a live production environment of hundreds of thousands of physical hosts. We'll discuss the process we used to perform the rollout, how our infrastructure benefited and took advantage of systemd and its features, how we worked with service owners on the integration and what challenges we encountered.
Recording: https://www.youtube.com/watch?v=LhYd0S3qiMY
Code reviews are vital for ensuring good code quality. They serve as one of our last lines of defense against bugs and subpar code reaching production.
Yet, they often turn into annoying tasks riddled with frustration, hostility, unclear feedback and lack of standards. How can we improve this crucial process?
In this session we will cover:
- The Art of Effective Code Reviews
- Streamlining the Review Process
- Elevating Reviews with Automated Tools
By the end of this presentation, you'll have the knowledge on how to organize and improve your code review proces
Modern design is crucial in today's digital environment, and this is especially true for SharePoint intranets. The design of these digital hubs is critical to user engagement and productivity enhancement. They are the cornerstone of internal collaboration and interaction within enterprises.
How Does XfilesPro Ensure Security While Sharing Documents in Salesforce?XfilesPro
Worried about document security while sharing them in Salesforce? Fret no more! Here are the top-notch security standards XfilesPro upholds to ensure strong security for your Salesforce documents while sharing with internal or external people.
To learn more, read the blog: https://www.xfilespro.com/how-does-xfilespro-make-document-sharing-secure-and-seamless-in-salesforce/
Multiple Your Crypto Portfolio with the Innovative Features of Advanced Crypt...Hivelance Technology
Cryptocurrency trading bots are computer programs designed to automate buying, selling, and managing cryptocurrency transactions. These bots utilize advanced algorithms and machine learning techniques to analyze market data, identify trading opportunities, and execute trades on behalf of their users. By automating the decision-making process, crypto trading bots can react to market changes faster than human traders
Hivelance, a leading provider of cryptocurrency trading bot development services, stands out as the premier choice for crypto traders and developers. Hivelance boasts a team of seasoned cryptocurrency experts and software engineers who deeply understand the crypto market and the latest trends in automated trading, Hivelance leverages the latest technologies and tools in the industry, including advanced AI and machine learning algorithms, to create highly efficient and adaptable crypto trading bots
Unleash Unlimited Potential with One-Time Purchase
BoxLang is more than just a language; it's a community. By choosing a Visionary License, you're not just investing in your success, you're actively contributing to the ongoing development and support of BoxLang.
Cyaniclab : Software Development Agency Portfolio.pdfCyanic lab
CyanicLab, an offshore custom software development company based in Sweden,India, Finland, is your go-to partner for startup development and innovative web design solutions. Our expert team specializes in crafting cutting-edge software tailored to meet the unique needs of startups and established enterprises alike. From conceptualization to execution, we offer comprehensive services including web and mobile app development, UI/UX design, and ongoing software maintenance. Ready to elevate your business? Contact CyanicLab today and let us propel your vision to success with our top-notch IT solutions.
Advanced Flow Concepts Every Developer Should KnowPeter Caitens
Tim Combridge from Sensible Giraffe and Salesforce Ben presents some important tips that all developers should know when dealing with Flows in Salesforce.
We describe the deployment and use of Globus Compute for remote computation. This content is aimed at researchers who wish to compute on remote resources using a unified programming interface, as well as system administrators who will deploy and operate Globus Compute services on their research computing infrastructure.
Strategies for Successful Data Migration Tools.pptxvarshanayak241
Data migration is a complex but essential task for organizations aiming to modernize their IT infrastructure and leverage new technologies. By understanding common challenges and implementing these strategies, businesses can achieve a successful migration with minimal disruption. Data Migration Tool like Ask On Data play a pivotal role in this journey, offering features that streamline the process, ensure data integrity, and maintain security. With the right approach and tools, organizations can turn the challenge of data migration into an opportunity for growth and innovation.
Enhancing Research Orchestration Capabilities at ORNL.pdfGlobus
Cross-facility research orchestration comes with ever-changing constraints regarding the availability and suitability of various compute and data resources. In short, a flexible data and processing fabric is needed to enable the dynamic redirection of data and compute tasks throughout the lifecycle of an experiment. In this talk, we illustrate how we easily leveraged Globus services to instrument the ACE research testbed at the Oak Ridge Leadership Computing Facility with flexible data and task orchestration capabilities.
Exploring Innovations in Data Repository Solutions - Insights from the U.S. G...Globus
The U.S. Geological Survey (USGS) has made substantial investments in meeting evolving scientific, technical, and policy driven demands on storing, managing, and delivering data. As these demands continue to grow in complexity and scale, the USGS must continue to explore innovative solutions to improve its management, curation, sharing, delivering, and preservation approaches for large-scale research data. Supporting these needs, the USGS has partnered with the University of Chicago-Globus to research and develop advanced repository components and workflows leveraging its current investment in Globus. The primary outcome of this partnership includes the development of a prototype enterprise repository, driven by USGS Data Release requirements, through exploration and implementation of the entire suite of the Globus platform offerings, including Globus Flow, Globus Auth, Globus Transfer, and Globus Search. This presentation will provide insights into this research partnership, introduce the unique requirements and challenges being addressed and provide relevant project progress.
Software Engineering, Software Consulting, Tech Lead.
Spring Boot, Spring Cloud, Spring Core, Spring JDBC, Spring Security,
Spring Transaction, Spring MVC,
Log4j, REST/SOAP WEB-SERVICES.
Field Employee Tracking System| MiTrack App| Best Employee Tracking Solution|...informapgpstrackings
Keep tabs on your field staff effortlessly with Informap Technology Centre LLC. Real-time tracking, task assignment, and smart features for efficient management. Request a live demo today!
For more details, visit us : https://informapuae.com/field-staff-tracking/
Check out the webinar slides to learn more about how XfilesPro transforms Salesforce document management by leveraging its world-class applications. For more details, please connect with sales@xfilespro.com
If you want to watch the on-demand webinar, please click here: https://www.xfilespro.com/webinars/salesforce-document-management-2-0-smarter-faster-better/
Globus Compute wth IRI Workflows - GlobusWorld 2024Globus
As part of the DOE Integrated Research Infrastructure (IRI) program, NERSC at Lawrence Berkeley National Lab and ALCF at Argonne National Lab are working closely with General Atomics on accelerating the computing requirements of the DIII-D experiment. As part of the work the team is investigating ways to speedup the time to solution for many different parts of the DIII-D workflow including how they run jobs on HPC systems. One of these routes is looking at Globus Compute as a way to replace the current method for managing tasks and we describe a brief proof of concept showing how Globus Compute could help to schedule jobs and be a tool to connect compute at different facilities.
TROUBLESHOOTING 9 TYPES OF OUTOFMEMORYERRORTier1 app
Even though at surface level ‘java.lang.OutOfMemoryError’ appears as one single error; underlyingly there are 9 types of OutOfMemoryError. Each type of OutOfMemoryError has different causes, diagnosis approaches and solutions. This session equips you with the knowledge, tools, and techniques needed to troubleshoot and conquer OutOfMemoryError in all its forms, ensuring smoother, more efficient Java applications.
Your Digital Assistant.
Making complex approach simple. Straightforward process saves time. No more waiting to connect with people that matter to you. Safety first is not a cliché - Securely protect information in cloud storage to prevent any third party from accessing data.
Would you rather make your visitors feel burdened by making them wait? Or choose VizMan for a stress-free experience? VizMan is an automated visitor management system that works for any industries not limited to factories, societies, government institutes, and warehouses. A new age contactless way of logging information of visitors, employees, packages, and vehicles. VizMan is a digital logbook so it deters unnecessary use of paper or space since there is no requirement of bundles of registers that is left to collect dust in a corner of a room. Visitor’s essential details, helps in scheduling meetings for visitors and employees, and assists in supervising the attendance of the employees. With VizMan, visitors don’t need to wait for hours in long queues. VizMan handles visitors with the value they deserve because we know time is important to you.
Feasible Features
One Subscription, Four Modules – Admin, Employee, Receptionist, and Gatekeeper ensures confidentiality and prevents data from being manipulated
User Friendly – can be easily used on Android, iOS, and Web Interface
Multiple Accessibility – Log in through any device from any place at any time
One app for all industries – a Visitor Management System that works for any organisation.
Stress-free Sign-up
Visitor is registered and checked-in by the Receptionist
Host gets a notification, where they opt to Approve the meeting
Host notifies the Receptionist of the end of the meeting
Visitor is checked-out by the Receptionist
Host enters notes and remarks of the meeting
Customizable Components
Scheduling Meetings – Host can invite visitors for meetings and also approve, reject and reschedule meetings
Single/Bulk invites – Invitations can be sent individually to a visitor or collectively to many visitors
VIP Visitors – Additional security of data for VIP visitors to avoid misuse of information
Courier Management – Keeps a check on deliveries like commodities being delivered in and out of establishments
Alerts & Notifications – Get notified on SMS, email, and application
Parking Management – Manage availability of parking space
Individual log-in – Every user has their own log-in id
Visitor/Meeting Analytics – Evaluate notes and remarks of the meeting stored in the system
Visitor Management System is a secure and user friendly database manager that records, filters, tracks the visitors to your organization.
"Secure Your Premises with VizMan (VMS) – Get It Now"
2. WHAT IS CRONJOB?
• is a utility program available on Linux/Mac OS.
• helps scheduling scripts, shell scripts, command or set of commands.
• executes commands or scripts on specific date and time.
• process is repeatable.
• you can schedule to execute as often you require.
• it is daemon or background running process.
• each user has their own crontab
• commands in any given crontab will be executed as the user who owns the
crontab.
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YOUTUBE CHANNEL:
LEARNERFOREVER
3. WHY CRONJOB IS USED?
Purpose of using Cronjob are:
• take a schedule backup of log files or database.
• delete old log files
• archive and purge database tables
• Send out any notification email such as Newletters, Password
expiration email
• Regular expire or clean up cached data
• Restart the servers for schedule maintenance 3
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LEARNERFOREVER
4. UNDERSTANDING THE CRONJOB SYNTAX
There are 2 essential parts in the syntax to understand:
• Timing part
• Command ( or set of commands)
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• e.g. --->
10 * * * * /usr/bin/sh /user/cartmanager/backup/db_backup.sh > /dev/null 2>&1
Timing Command
5. UNDERSTANDING THE TIMING SYNTAX
Timing is having total 5 parts
in it:
• Minute (M)
• Hour (H)
• Day of Month (Dm)
• Month (Mo)
• Day of Week (Dw)
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10 * * * *
M H Dm Mo Dw
6. FIELDS AND ALLOWED VALUES
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Field Value
Minute 0-59
Hour 0-23
Day of month 1-31
Month 1-12 or names
Day of week 0-7 or names (0 or 7 is
Sunday)
7. CRONJOB EXPRESSIONS
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Expression Meaning Equivalent Expression
@yearly Yearly 0 0 1 1 *
@annually Same as yearly 0 0 1 1 *
@monthly Monthly 0 0 1 * *
@weekly Weekly 0 0 * * 0
@daily Daily 0 0 * * *
@hourly Hourly 0 * * * *
@midnight Every Midnight 0 0 * * *
@reboot After every reboot of the
machine
Expression Meaning
* Any value
, Value list
- Separator
/ Step values
8. 12 FANTASTIC EXAMPLES TO LEARN
SCHEDULING
Example:
0 0 1 1 *
# run every month
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Example:
5 0 * * *
# run every five
minutes after
midnight
Example:
0 0 * * WED
#run every Wednesday
Example:
*/15 * * * *
#run every 15
minutes
Example:
0 */2 * * *
#run every 2 hours
Example:
* * * * *
#run every 1 minutes
Example:
0 2 * * *
#run every day 2PM
Example:
0 0 1 */3 *
# run every quarter
Example:
0 0 1 */6 *
# run every six
months
Example:
0 0 1 1 *
# run every year
Example:
0 22 * * 1-5
# run at 10 AM every
Monday to Friday
Example:
0 0 1 */2 *
# run every
alternative month
9. USE CASES
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Use case1: Your manager Ramesh asks you to schedule a cron job to
take a Database backup on 22nd August 08:30 AM
• 30 08 10 06 * /home/appuser/db-backup.sh
Use case2: Now Ramesh wants you to delete cache twice a day at 11AM
and 4PM
• 0 11,16 * * * /home/appuser/delete-cache.sh
10. USE CASES
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Use case4: Ramesh is not happy with the previous scheduling, he wants
you to update the same job to run only between Monday to Friday
• 00 09-18 * * 1-5 /home/appuser/db-backup.sh
Use case3: Now Ramesh wants you to activate newly created users
between 9AM to 6PM everyday
• 00 09-18 * * * /home/appuser/activate-users.sh
11. CRONTAB COMMANDS
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Command Value
crontab -l List all the cron job scheduled for the user
crontab -e Edit cron job for the user
crontab -r Remove crontab for the user
crontab -u Specify the user whose cron job you want to edit
12. YOUR LEARNING IS
YOUR RESPONSIBILITY.
SUBSCRIBE MY CHANNEL
FOR CONTINUOUS
LEARNING. 12
YOUTUBE CHANNEL:
LEARNERFOREVER