Linux System Administration Jobs

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Fixed-Price - Entry Level ($) - Est. Budget: $50 - Posted
1. I will need the explanation of the project after the completion, so that I can present it later. 2. First we need to generate x509 Client and Server Certificates (Attribute certificates). 3. After that, we need to use these Certificates in OPC UA Server and client and should establish a secure connection. You can get OPC UA client and server here. https://www.prosysopc.com/products/opc-ua-java-sdk/. 4. After the connection establishment, we need to use Attribute based access control. I need mobile device as client. We do have option in OPC UA clients. I should be able to access the server with my mobile as the client. 5. Attribute based Access control with roles and time as two different attributes
Skills: Linux System Administration Information Security Internet Security Java
Hourly - Intermediate ($$) - Est. Time: Less than 1 week, 10-30 hrs/week - Posted
I need to tune apache server to optimize speed, Job scope: Install and run Apache2Buddy, document suggestions Optimize MPM: StartServers MinSpareServers MaxSpareServers MaxClients MaxRequestsPerChild document all We have a server wich is using cpu and ram no more than 15% but after 500 concurrent users server is very very slow, we use new relic monitoring tools. Bottom line, we need to increase our server response time
Skills: Linux System Administration
Fixed-Price - Expert ($$$) - Est. Budget: $200 - Posted
I have an office with about 20 switches about 4 or 5 routers. There is two types of switches, however they are the same brand and so they will use the same commands to remotely configure. All of the switches and routers are accessible via SSH. switches and routers are all accessible via SSH I want a script made that our technicians can run from a linux console. The script will manages the backup, restore and deployment of routers and switches. Passwords for swithes and routers will all be uniform and will just be set in a variable of the script that we can open and edit if required. We will have already preconfigured the switches, so there is no need for the script to interact with the content of the configs. The script would manage a basic database of switch/router names and IP addresses. Imagine that the name of the script is "script". Here are some of the example commands that we would run from the linux console. ./script router add <routername> <routerip> or ./script switch add <switchname> <switchip> or ./script router delete <routername> <routerip> or ./script switch delete <switchname> <switchip> **what this does it just adds a switch or router to the database and gives it a name and IP address ./script switch backup <switchname> **this would ssh into the ip address of the switch and use commands to output the running config to a file with the name of the switch and a datestamp. if there is an existing file for that date it will just overwrite it. for example the fill would be switch-<switchname>-config-2016-08-24.conf ./script switch restore <switchname> **will take the most recent config file for the named switch upload it to the switch and reboot the switch ./script switch restore <switchname> 2016-08-23 **will restore the switch config from that date **same obviously for ./script router restore <routername> (date) ./script switch deploy <switchname> **deploy will work as follows: **we will have several spare switches and routers **these will all have the same IP and username and password so that the script can write the config to any of them if they are plugged onto the network. We will make sure that all of the spare routers and switches are configured correctly. i.e. if 192.168.1.254 is the IP of every spare router, and 192.168.1.253 is the IP of every spare switch, and admin / admin as the username and password, if we have a router or switch die we could use the following command to deploy a new version of "router5". ./script router deploy router5 or ./script router deploy router5 2016-08-23 this will result in ssh to admin@192.168.1.254 and upload the config file router-router5-config-2016-08-23.xml to the router and then reboot the router allowing us to deploy a router quickly from a backup. we will always have a spare router and spare switch connected to the network at all times. as a result, we would like a function "testdeploy". This will login to the router and test the login to the spare switch and spare router. When adding or removing a switch to the database it will also manage a script run by cron to do daily backups of all switches and routers, as well as the function above "testdeploy" which would be outputted to an email every day. all switches are dell switches, which, like cisco we can just write or save the config to and from the switch. all the routers are pfsense, we can sftp the config file down to backup and to restore, sftp the config up and reboot the server to apply. we have already built a script that downloads the configs of all of our switches and routers, so you can take a look at this. We just require assistance with tieing it all together in a script with a database that manages the routers and switches, and automatically builds cron jobs to do daily backups of all of the named switches/routers in the database. ./script router makespare router5 or ./script switch makespare switch10 it could also be used to turn a running production router/switch into a spare, for testing or other reasons, making sure that the device is configured correctly for redeployment we could have a sparerouter.conf and spareswitch.conf which we can provide so that it can be saved in the working directory so that we can upload these to the device to do this function.
Skills: Linux System Administration Bash shell scripting Network Administration Ubuntu
Fixed-Price - Expert ($$$) - Est. Budget: $150 - Posted
We are looking for someone to create a quick proof of concept using our existing software. This is a chance for ongoing work and will allow the candidate to get to know our current codebase with a paid project. The current software takes interior room images, identifies polygons with holes (walls) in the image (let's call these Pa) and modifies the polygon color while preserving the existing lightness of the polygon. The proof of concept only requires some image manipulation for a mockup and should: 1. Allow a new polygon, Pb where the area of Pb < Pa, to be placed inside Pa 2. Assuming there are no rotations, find the lightness of the area in Pa now covered by Pb 3. Map the lightness of Pa onto Pb If the proof of concept works this can lead to a much richer project which does include rotations and further image manipulation. We also have some additional work needed on the current code base which, if this project works out, will be awarded to the successful candidate.
Skills: Linux System Administration C Computer vision OpenCV
Hourly - Intermediate ($$) - Est. Time: More than 6 months, 10-30 hrs/week - Posted
We are looking for an expert Linux admin with extensive WHM/Cpanel experience to help us monitor and admin 8 VPS servers. We have to be available during US Business hours 8AM - 5PM PST. PLEASE DO NOT APPLY IF YOU DO NOT HAVE EXTENSIVE WHM/CPANEL EXPERIENCE. Need to be very familiar with DNS clusters and MySQL MASTER-SLAVE setup. Thanks,
Skills: Linux System Administration CPanel DNS MySQL Administration
Hourly - Entry Level ($) - Est. Time: Less than 1 month, 10-30 hrs/week - Posted
We are creating a VPN provider to a specific list of IP Addresses. At the end of this project, when a user registers to our website (creates an LDAP account) and is approved, our website should be able to trigger the start of an OpenVPN server provisioning using Ansible. A user should be able to have multiple VPN servers attached to a single LDAP account. We should have the ability to cancel (and destroy) any server on any account (and recycle the IP). We are looking for a person with sysadmin experience using Ansible, KVM, OpenVPN and LDAP. You will be working with a software developer to provide a frontend to the automations. We are Automating VPN registration for our users, we want to create a system that allows us to simply provision a VPN server that is connected to a LDAP user account. This process should be fully automated and open to automation that can be triggered from software from our website, probably through an API. We are suggesting Ansible, KVM, OpenVPN and LDAP, but we are open to suggestions that can accomplish the same outcome with less effort. The front-end system will be a php website (custom Drupal) developed by our in-house software developers. We require clear written documentation on all work done. This project will be done on a phase by phase basis, so we will pay on milestone achievements based on what you suggest as the solution and what we discuss. To stand out from the crowd, please give a detailed outline of your implementation plan. We are mostly developers so we understand network Jargon. The best plan wins, we will negotiate to get the best price in the shortlist.
Skills: Linux System Administration Ansible KVM Virtualization LDAP
Hourly - Entry Level ($) - Est. Time: Less than 1 week, 10-30 hrs/week - Posted
Hi, I messed up an upgrade of Owncloud, tried to do it directly from version 8.2.6 to 9.1, skipping the releases between. Now I'me getting the error attached: "PHP module mb multibyte not installed. Please ask your server administrator to install the module. PHP modules have been installed, but they are still listed as missing? Please ask your server administrator to restart the web server." The reason of the upgrade was because some of the folders weren't synchronizing correctly to the desktop clients. The job consist in correctly install the 9.1 version, maintaining the files (which are intact as I can see them by FTP) and user database. I have a backup of all of files from the 8.2.6 version from the day before the upgrade. Owncloud is hosted in a GoDaddy Dedicated Server, installed first through installatron.
Skills: Linux System Administration
Fixed-Price - Expert ($$$) - Est. Budget: $50 - Posted
We currently have 2x Mikrotik CCR routers that are connected to a BGP provider each. We are having problems with some VPS' on our platform causing/being targeted by UDP flood attacks, etc. We would like someone to mitigate this problem by integrating a solution that can automatically resolve those issues: 1) Use FastNetMon (or any other open source DDoS protection tool) to monitor traffic from CCR (preferably using traffic flows, flexible on this). 2) Set it up in "watch" only mode to alert via PagerDuty if an issue occurs 3) After a week, if everything is okay, we will switch it into blocking mode, you'll have to configure ExaBGP integration so it can announce /32 prefixes to a BGP peer which will block all incoming traffic at our transit provider AND automatically blackhole in mikrotik 4) Slack notifications once something gets blocked! Thank you.
Skills: Linux System Administration Mikrotik RouterOS Network Security System Administration