Opsworks is a wonderful SaaS tool provided by AWS which off-loads human driven tasks like managing own chef server, installing agents on each server, creating ssh user(s) even on run-time for the servers and various other benefits. In this blog an IAM User will be created without any CLI credentials, it will be registered with […]
This blog post refers to a use case I came across recently wherein, a few users had to remotely log into the server using SFTP. These users should be restricted to perform read/write operation only in their home directory and only from office network i.e the public IP address(es), their office network is fabricated upon. […]
This blog is in continuation to our previous blog. The focus of this blog is to enable AWS professionals to change pem of running servers or to add a new user with sudo privileges to an EC2 server farm using Puppet. Similar use case of performing the same task using CHEF has been discussed here. […]
Consider a use case where in any team members have opened port 22 for 0.0.0.0/0 inside an EC2 security group and forgot, which is a big security concern for the Instances. So I have written a script using python boto library which scans all the security groups of running / stopped instances and sends an email […]
ClusterSSH is a group SSH administration tool. It is used to control number of xterm windows via single Administration console to allow commands to run on multiple servers over an SSH connection. Sometimes, you may have chances to enter same command on many servers. To do that, you have to login to each server and […]
Sometimes we get the requirement to change the key-pair for some security reasons. In this article, we will be changing the key pair of running EC2 instances. Steps: 1. Create a new key pair from AWS Console. 2. Generate Public key from newly created key pair ( Private Key ). 3. Paste the generated public […]
In one of my Grails project I need to drop files over ftp server. Using JSch one can easily transfer files over sftp. Just follow the below steps. 1. Add the below dependency to Grails project “grails-app/conf/BuildConfig.groovy” file [sourcecode language=”groovy”] dependencies { compile ‘com.jcraft:jsch:0.1.49’ } [/sourcecode] 2. Create a class for adding ftp credentials information. e.g. “FtpCredentail” […]
Very often, we all need to access a remote database for debugging or any other related stuff. The simplest thing that comes to mind is to take the dump of remote database and bring it to the local and run the application using that data. We can avoid that, if we can connect our local […]
This post is just to talk about Screen Sessions in Linux (esp. ubuntu) using command “byobu”. What is Byobu? Byobu is a Japanese term for decorative, multi-panel screens. As an open source project, Byobu is an elegant enhancement of plain GNU Screen. Where can it be used? You SSH to some remote machine […]
