How-To on Shafiq Alibhai

Shutdown Proxmox VM using CLI

Tue, 17 Oct 2023 01:30:03 +0000

If you’re looking to shut down a virtual machine running on a Proxmox Virtual Environment (PVE), you can use the Proxmox command-line interface (CLI) to accomplish this task quite effectively. The command for shutting down a VM in Proxmox is qm shutdown, followed by the ID of the virtual machine you’d like to shut down. Here’s how to do it:

Access the Server: First, log in to your Proxmox server via SSH.

How to count number of words in a pdf file from Linux cli

Tue, 05 Sep 2023 04:30:03 +0000

Using `pdftotext`:#

Installation:
- If it’s not installed, you’ll need to install the poppler-utils package which includes pdftotext.
```
sudo apt install poppler-utils
```
or
```
yum install poppler-utils
```
depending on your distribution.
Usage:
- Once installed, you can convert a PDF to text and then count the words as follows:
```
pdftotext input.pdf - | wc -w
```
Here, input.pdf is your source PDF file, and wc -w counts the number of words. The - in pdftotext specifies that the output should be sent to stdout, which is then piped into wc.

How to avoid other pods from being scheduled on your node in Kubernetes

Thu, 13 Jul 2023 11:30:03 +0000

Kubernetes is a powerful platform for managing containerized applications across a cluster of nodes. However, sometimes you may want to have more control over which pods are scheduled on which nodes, for various reasons such as performance, security, or cost.

What are taints and tolerations?#

Taints and tolerations are a feature of Kubernetes that allow you to mark nodes with certain attributes or conditions, and then specify which pods can or cannot be scheduled on those nodes based on those attributes or conditions. Taints are applied to nodes, and tolerations are applied to pods.

How to get a remote server SSL certificate

Tue, 15 Jun 2021 08:21:21 +0000

openssl s_client -connect {HOSTNAME}:{PORT} -showcerts

Replace all dots in filenames except the extension on Linux

Thu, 21 Jan 2021 13:00:41 +0000

for f in .; do pre="${f%.}"; suf="${f##.}"; mv -i -f -- "$f" "${pre//./_}.${suf}"; done

Count number of directories in the current directory using Linux cli

Tue, 14 Jul 2020 09:17:02 +0000

ls -1 | wc -l

Count number of files in a directory using Linux cli

Tue, 14 Jul 2020 09:15:31 +0000

ls -l . | egrep -c '^-'

Fix casks with `depends_on` that reference pre-Mavericks

Mon, 18 May 2020 10:01:16 +0000

If you get an error of the type Error: Cask 'hex-fiend-beta' definition is invalid: invalid 'depends_on macos' value: ":lion", where hex-fiend-beta can be any cask name, and :lion any macOS release name, run the following command:

/usr/bin/find "$(brew --prefix)/Caskroom/"*'/.metadata' -type f -name '*.rb' -print0 | /usr/bin/xargs -0 /usr/bin/perl -i -pe 's/depends_on macos: \[.*?\]//gsm;s/depends_on macos: .*//g'

This will remove all depends_on macos references of installed casks.

How to run VLC player as root user

Mon, 18 May 2020 09:59:54 +0000

sed -i 's/geteuid/getppid/' /usr/bin/vlc

Explanation: The initialization script check if the UID is equals to zero. Zero is reserved for the root user. Using sed to replace geteuid for getppid fools the initialization script because it is always > 0.

While running the VLC as root is not recommended, it works. Be aware of the risks and obviously do not do it for production environments.

NPM update all globally installed packages

Sat, 22 Dec 2018 09:42:28 +0000

npm update -g

Decoding the Error: StatusCode=0 "ReferencedResourceNotProvisioned" in Azure

Sat, 22 Dec 2018 09:38:39 +0000

Introduction#

If you’re working with Azure, you might have encountered an error that looks something like this:

“Failure sending request: StatusCode=0 — Original Error: Code=‘ReferencedResourceNotProvisioned’ Message=‘Cannot proceed with operation because resource used by resource is not in Succeeded state. Resource is in Updating state and the last operation that updated/is updating the resource is PutSubnetOperation.’”

Though the error message can seem intimidating and cryptic at first, don’t worry. In this post, we’ll delve into what this error means and how you can resolve it.

Import a Resource to Terraform Module

Wed, 24 Oct 2018 15:57:34 +0000

The example below will import an AWS instance into a terraform module:

terraform import module.foo.aws_instance.bar i-abcd1234

Navigating Terraform Modules Stored in Package Subdirectories

Wed, 24 Oct 2018 13:16:15 +0000

In the realm of Infrastructure as Code, Terraform modules can play a significant role in making your life easier. Sometimes, however, these modules don’t live at the root directory of their source package. Instead, they reside in sub-directories. Thankfully, Terraform has a smart way to help you access these nested modules.

Terraform employs a unique double-slash (//) syntax to help pinpoint the exact sub-directory where the module is located. The path that follows this double-slash syntax is considered to be a sub-directory within the package or repository.

How to Fix the "RPC failed; HTTP 413 curl 22" Error in Nginx

Fri, 12 Oct 2018 09:49:17 +0000

Understanding the Issue: ‘RPC failed; HTTP 413 curl 22’#

If you’ve stumbled upon the error message “RPC failed; HTTP 413 curl 22 The requested URL returned error: 413 Request Entity Too Large,” you’re probably trying to push a rather hefty commit over HTTP to your server running Nginx. This error means that the size of the request you’re trying to send exceeds the limit that the server is willing to accept. So, how do you fix it?

Install ruby gem files

Thu, 27 Sep 2018 10:16:03 +0000

Install the gems on the destination machine from the local files:

cd /path/to/gems
gem install --force --local *.gem

/bin/sh: 1: flex: not found

Wed, 19 Sep 2018 15:32:11 +0000

sudo apt-get install flex

Merging Unrelated Git Histories - A Simple Guide

Tue, 04 Sep 2018 13:48:55 +0000

Are you stuck with two Git repositories or branches that have completely different histories, but you need to merge them? You may be hitting a roadblock because Git is designed to prevent this kind of operation by default. However, there’s a workaround for this, and it’s simpler than you might think.

The Problem: Unrelated Git Histories#

Imagine you’re working on a project where you have a main branch, and someone else has a completely separate project with its own history. Now, you want to combine both projects into a single repository. If you try to perform a regular git merge or git rebase, Git will likely stop you with an error message, something like:

Running Firefox OS apps on Ubuntu linux

Sat, 24 Nov 2012 12:02:39 +0000

[HowTo] Replace ip address using sed

Mon, 20 Jun 2011 11:38:01 +0000

Following one-liner will search for a ip address pattern in the specified file and replace it with the one provided :

sed 's/[0-9]\{1,3\}.[0-9]\{1,3\}.[0-9]\{1,3\}.[0-9]\{1,3\}/**IPADDRESS-COMES-HERE**/g' /SourceFilename > /DestinationFilename

Disable services in Solaris 10

Mon, 23 May 2011 16:57:14 +0000

To disable a service, you must be root or have sudo privileges.

For example, to disable the Puppet service, you would run the following command:

svcadm disable network/cswpuppetd:default

This will disable the Puppet service and prevent it from running.

To verify that the service has been disabled, you can run the following command:

svcs | grep puppet

This will list all of the services that are currently running, and if the Puppet service is disabled, it will not be listed.

ERROR: phpize failed [solved]

Mon, 17 Jan 2011 06:51:05 +0000

How to install PHP development files

If you want to run phpize on your system, you need to install the development files of PHP first. Otherwise, you might get an error message like this:

sh: phpize: not found
ERROR: `phpize' failed

To install the PHP development files on Ubuntu/Debian, you can use the following command in the terminal:

apt-get install php5-dev

That should solve the problem. 🙂

How To Get The Current Epoch Time (Unix Timestamp)

Thu, 30 Sep 2010 04:56:45 +0000

PHP
PostgreSQL
powershell
Python
ruby
shell
sql server
unix
Unix Timestamp
vbscript

disableHLJS: false#

Perl:

time

PHP:

time()

Ruby:

Time.now # (or Time.new). To display the epoch: Time.now.to_i

Python:

import time # first, then int(time.time())

Java:

long epoch = System.currentTimeMillis()/1000;

Microsoft .NET C#:

epoch = (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000;

VBScript/ASP:

DateDiff("s", "01/01/1970 00:00:00", Now())

Erlang:

calendar:datetime_to_gregorian_seconds(calendar:now_to_universal_time( now()))-719528*24*3600. # OR element(1, now()) * 10000 + element(2, now()).

MySQL:

SELECT unix_timestamp(now())

PostgreSQL:

SELECT extract(epoch FROM now());

Oracle PL/SQL:

SELECT (SYSDATE - TO_DATE('01-01-1970 00:00:00', 'DD-MM-YYYY HH24:MI:SS')) * 24 * 60 * 60 FROM DUAL

SQL Server:

SELECT DATEDIFF(s, '1970-01-01 00:00:00', GETUTCDATE())

JavaScript:

Math.round(new Date().getTime()/1000.0) // getTime() returns time in milliseconds.

Unix/Linux Shell:

date +%s

PowerShell:

Get-Date -UFormat "%s" # Produces: 1279152364.63599

Actionscript:

(new Date()).time

Other OS’s Command line:

perl -e "print time" # (If Perl is installed on your system)

ColdFusion (CFML) MX 6.1+:

#int( getTickCount() / 1000 )#

Bash Command Line:

date +%s

Preserve File Permissions While Copying Files in Linux

Mon, 14 Jun 2010 09:35:12 +0000

Following is the command :

cp -p /aaa/bbb /ccc/ddd

How to Identify Your Linux Distribution and Version with Simple Commands

Tue, 23 Mar 2010 05:10:33 +0000

If you are using a Linux-based operating system and you want to know which specific distribution and version you have installed, there is a simple command that can help you with that. Just open a terminal window and type the following:

cat /etc/issue

This will display the name and the release number of your Linux distribution. For example, if you are using Debian 4.0, the output will look like this:

Debian GNU/Linux 4.0 \n \l

The \n and \l are special characters that represent the current date and the name of the terminal device, respectively. They are not part of the distribution name.