vadirajks

$ aws pricing describe-services \
  --region us-east-1 \
| jq -r '.Services[] | select (.ServiceCode=="AmazonEC2") | .AttributeNames[]' \
| sort
LeaseContractLength
OfferingClass
PurchaseOption
capacitystatus
clockSpeed

vadirajks

sudo yum makecache
sudo yum update
sudo yum install epel-release
sudo yum makecache
sudo yum install python-pip
sudo yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-$(rpm -E '%{rhel}').noarch.rpm
sudo yum install https://$(rpm -E '%{?centos:centos}%{!?centos:rhel}%{rhel}').iuscommunity.org/ius-release.rpm
sudo yum makecache
sudo yum install yum-plugin-replace
sudo yum repolist

vadirajks

]# yum -y install perl-XML-Simple perl-YAML-Syck perl-Data-Dumper
]# cat /custom_scripts/xml2yaml.pl
#!/usr/bin/perl

use XML::Simple;
#use Data::Dumper;
use YAML::Syck;

if( ( not defined $ARGV[0]) or ( $ARGV[0] eq "-h" ) or ( $ARGV[0] eq "--help" ) ) {
	print "USAGE: perl xml2yaml.pl file.xml > file.yaml\n";

vadirajks

#!/bin/sh

ls Postman*.tar.gz > /dev/null 2>&1
if [ $? -eq 0 ]; then
	echo "Removing old Postman tarballs"
	rm -f $(ls Postman*.tar.gz)
fi

echo "Downloading latest Postman tarball"
curlExists=$(command -v curl)

vadirajks

example :
#yumdownloader --source  python-psycopg2-2.5.1-3.amzn2.0.2
yum -y install wget bash-completion bash-completion-extras vim screen sysstat chrony

vadirajks

[root@xen-R9-dev49-0 env]# cat vm_backupexport.sh
#!/bin/bash
eval array=($(xe vm-list params=uuid is-control-domain=false|grep "uuid"|cut -c 17-))
for uuid in "${array[@]}"; do
	vm_name=$(xe vm-list params=name-label uuid=$uuid|grep "name-label"|cut -c 23-)
	echo "xe vm-export vm='"$uuid"' filename="$vm_name".xva"
	#xe vm-export vm=$uuid filename=$vm_name.xva
done
[root@xen-R9-dev49-0 env]# 
[root@xen-R9-dev49-0 env]# cat vm_details.sh

vadirajks

Type arrows by copy/pasting the following Unicode characters:

arrows ↑ ↓ ← →
diagonal arrows ↖ ↗ ↘ ↙

The keyboard HTML entity character codes are: ↑ ↓ ← →
HTML entities for mdash and ndash (for long dashes): — –
HTML entities for less than and greater than characters: < >

vadirajks

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/device_naming.html
https://docs.aws.amazon.com/en_pv/AWSEC2/latest/UserGuide/recognize-expanded-volume-linux.html

disk Type:
   Nitro-based Instance:/dev/nvme[0-26]n1[p1...]->(0-26 Disk Number,[p1...] is Partition Number)

Identifying the File System for a Volume:
   [ec2-user ~]$ df -T
   Filesystem     Type      1K-blocks    Used  Available Use% Mounted on
   devtmpfs       devtmpfs    1878928       0    1878928   0% /dev

vadirajks

Xmllint
$ sudo apt install libxml2-utils
$ sudo yum install libxml2-utils
$ xmllint --format data

Xml_pp:
$ sudo apt install libxml2-utils
$ sudo yum install libxml2-utils
$ xmllint --format data

vadirajks

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
installing python 2.6 in RHEL7:
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
# Install fpm
yum install ruby-devel gcc make rpm-build rubygems
gem install --no-ri --no-rdoc fpm

# Install prerequisite to compile Python
yum groupinstall "Development tools"
yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel