Emre Kurnaz's IT Diary

Most of the time I am using   vim   editor when I need to edit and modify files. In the beginning it looks strange for the people working on Windows since classical Notepad application is much more simple and the graphical user interface provides more simplicity. Having several modes in vim it is making things a little difficult to understand but the strength of the editor stays behinds these modes. Of course we will touch to the cursor highlighting in vim a little later. What we usually start to learn from using vim is to open a file then press i to enable  INSERT  mode, make some changes, and  ESC  to enable  escape mode  and type  :wq  to save and exit or  :q!  to quit without saving. As we all know this is the most basic thing we can perform with vim. Of course within the  ESCAPE  mode, there are many more things that can be done such as replacing strings, adding line numbers, define number of spaces of an indent ...

 I ntroduction to Passing Variables to AWK AWK  is one of the most famous commands to use and manipulate the string based files which can be parsed into fields using delimiters and the functionality can even extended with passing variables to awk. It is so much convenient to work with AWK due to its easiness and understandable scripting to accomplish some certain tasks such as filtering fields. The special parameter  -v  is used to pass bash variables or variables inside a script . The general syntax will look like the following. The most important thing is that for each variable that needs to be passed into awk script, they all need to be passed with repetitive -v use.  awk -v var_name=value [-v var_name2=value2] 'AWK script' input_file In a sample input.txt file, say the content looks like as the following. If delimited with space, first column will be the count, second field is the user agent and third field is the agent version. $ cat input.txt 30 okhttp 5.0...

  This article will be about some basic usages of awscli for S3 operations First we need to create a profile, this will be basically storing the information about our S3 connection. $ aws configure AWS Access Key ID []: <this will be Access Key Id> AWS Secret Access Key []: <this will be the Secret Key> Default region name []: <This will be the region name> Default output format []: <This will be the output format of each aws command> Listing the buckets $ aws s3 ls --endpoint-url <endpoint url> 2023-06-07 16:37:25 bucket1 2023-06-14 13:50:00 bucket2 List objects and prefixes in the bucket $ aws s3 ls --endpoint-url <endpoint url> bucket1 PRE folder1 2023-06-15 10:32:40 101713608 object1 Get ObjectLock configuration for a bucket $ aws s3api get-object-lock-configuration --bucket bucket1 { "ObjectLockConfiguration": { "ObjectLockEnabled": "Enabled", "Rule": { "DefaultRetention": { ...

I have been using Isilon simulator for a long time to test some features and prepare myself to some projects. Knowing that this is a home environment, I am also performing patch installations when I have time. Lets first power on the Powerscale nodes on my Vmware Workstation. We will need to wait some time for all nodes to totally up and running. Lets check if we are able to login from the cli and run "isi status" to check the cluster status. Next, we will need to download the Rollup Patch from the Dell Technologies Support page. After downloading we will need to extract the file. You will see that the contents of the file similar to below; here we will need to upload the file with the pkg extension to the /ifs/data/Isilon_Support/ .  I am using FileZilla to perform the upload I can verify that the file is there. Here we are ready to Perform  the code upgrade. This part really important since we are here only performing the code upgrade, in a real work scenario, you will nee...

For a long time, I have been using a home lab environment for many things. The way, I am doing is that, cloning from my template virtual machines to provision new ones, and change settings manually. This is not rocket science, however I wanted to ease and automate one of my basic processes. Using Vmware Workstation Pro 16 in my environment, I noticed that there is a Rest Api provided within the software, and noticed that there is no option for creating a virtual machine from the scratch however, there is an option to clone a VM to another, which I was surprised to see but liked a lot. While further digging, I noticed that I can use Terraform to do such provisioning using Vmware Workstation provider , which I was thinking to use. I was super excited to use Terraform for the first time in my life, so I cloned a new Virtual Machine, set its IP Address, create the DNS records as I described in my blog article  etc. I checked Terraform deployment article, prepare the prerequisites and i...

When working with enterprise systems, it is always good to have a lab system that you can easily try  and break things. Today, I will be writing about one of my favorite products, Dell EMC ECS, which is sometimes scary when I need to perform some uncommon things. I am following the GitHub website for Dell EMC ECS Community Edition , for the latest release and install this version. Today, the most recent version available is 3.7.0.0 and you may directly download the OVA file from here . You may also read the Release Notes  but dont forget that this article is aimed for Community Edition, thus keep in mind that this will be an unsupported deployment and purposed for lab and testing basically. For the enterprise Dell EMC ECS products, you may visit Dell Technologies website. OK, lets continue with the deployment. I assume you have the OVA file already downloaded and ready to be deployment. In my Vmware Workstation setup, I do click on File > Open and select the OVA file to dep...

One of the most struggling parts of administrating a huge NAS system like Isilon/Powerscale is Antivirus management. ICAP is the most used protocol for Antivirus scanning, which is basically, NAS is sending the file to the Antivirus server and wait for the file analysis and quarantine/truncate etc if needed. Most of the NAS admins can complain how this approach is not that much effective with the aspect of resource utilization and performance of antivirus scanning. CAVA is currently available on Powerscale OneFS versions 9.1 and later, and supports SMB protocol only. What it does is sharing the IFS filesystem only to CAVA servers over a restricted zone and IP Pool and relies on the filesystem auditing.  Whenever a file access is requested, the audit is sent to the CAVA/CEE Agent on the Antivirus server for him to identify what filepath needs to be scanned, and access the file path over CHECK$ share and performs the scan. To have a successful implementation of CAVA, please make sure...