AWS news analysis and DevOps guides.

AWS news analysis and DevOps guides from the engineers who run production AWS for regulated teams. The Linux and sysadmin archive goes back to 2009.

AWS

Synology NAS – LDAP Integration issue

15 July 2017·1 min readArchive

Issue After the latest update of Synolofy NAS 6.1, the LDAP integration is no more working. The NAS is throwing error while clicking on the LDAP detected users. Solution NAS >> Domain / LDAP >> LDAP...

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AWS

SSH or git-clone via Proxy

28 June 2017·1 min readArchive

Today we were setting up few Web servers on a private network which will be serving the traffic through the Load Balancer. The setup was simple until we came to know that the Webservers needs to...

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RHEL

IPA registration error – libcurl failed to execute the HTTP POST transaction. SSL connect error

7 June 2017·1 min readArchive

Today we were trying to join RHEL-6 clients to our new IPA server. Most of the servers got registered and very few RHEL6 systems were failing to join. We ran the ipa-client-install with -d option for...

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Azure

How to Install Hyper-V on a Virtual Machine VM

5 May 2017·1 min readArchive

Hello 🙂 If you are here with the below error, and you are trying to install Hyper-V on a VM for testing purpose, you are at the right place. Error Hyper-V can not be installed: The hypervisor is...

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AWS

Jenkins not starting on CentOS 7 / RHEL 7

24 March 2017·1 min readArchive

Today i was installing Jenkins on a CentOS7 systems. After installing it via Jenkins yum repository, the service was not stating. The java was already installed on the server. Issue You have...

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RHEL

The disk contains an unclean file system (0, 0). NTFS error on Linux

23 February 2017·1 min readArchive

Issue You are trying to mount an NTFS partition and the console is throwing the below error. Let’s see how to fix this. The disk contains an unclean file system (0, 0). Metadata kept in Windows...

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CentOS

OpenVPN with CSF firewall rules

2 February 2017·1 min readArchive

We are a big fan of OpenVPN when it comes to security. Many organizations have already switched to OpenVPN from PPTP etc. NixVPN is my favorite VPN software to host it on a standalone instance. But...

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CentOS

VSFTP chroot jail users – Limit FTP users access to home directory

1 February 2017·1 min readArchive

Lets see how we can configure a secure FTP server on CentOS RHEL 6 / 7 First, you need to install the vsftp package on your server yum install -y vsftpd Once installed, lets start editing the...

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AWS

Disable SU access for sudo users

11 January 2017·1 min readArchive

Some times you need to disable sudo su – access on your environment so that the users will use sudo command always and they will not switch to any other users account unnecessarily Lets see how to do...

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RHEL

How to log all sudo commands

11 January 2017·1 min readArchive

Sometimes it’s necessary to log all the sudo commands run in your environment. Let”s see how to achieve this. Edit the sudoers file by running visudo visudo Add the below line to the Defaults section...

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Hot News

AWS Announces Immediate Availability of London Region

14 December 2016·1 min readArchive

AWS has announced immediate availability of the new Europe (London) Region. The London Region joins Ireland and Frankfurt as AWS’ third European location, and provides the customer with a new option...

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SysAdmin

How to clear Memcache and redis without restarting the service

30 November 2016·1 min readArchive

How to clear memcache and redis without restarting service. Clear Memcache telnet 172.25.16.191 11211 Trying 172.25.16.191… Connected to 172.25.16.191. Escape character is ‘^]’. flush_all OK quit...

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